Slieve Gallion (County Londonderry) weather
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Forecast days
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Today. Maximum daytime temperature: 5 degrees Celsius; Minimum nighttime temperature: 0 degrees Celsius. Overcast changing to sunny intervals by early evening. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; Pollen: Low.Today. Maximum daytime temperature: 5 degrees Celsius; Minimum nighttime temperature: 0 degrees Celsius. Overcast changing to sunny intervals by early evening. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; Pollen: Low.
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Friday 26 April. Maximum daytime temperature: 5 degrees Celsius; Minimum nighttime temperature: -2 degrees Celsius. Sunny changing to cloudy by late morning. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; Pollen: Low.Friday 26 April. Maximum daytime temperature: 5 degrees Celsius; Minimum nighttime temperature: -2 degrees Celsius. Sunny changing to cloudy by late morning. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; Pollen: Low.
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Saturday 27 April. Maximum daytime temperature: 7 degrees Celsius; Minimum nighttime temperature: -2 degrees Celsius. Sunny changing to light showers by lunchtime. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; Pollen: Low.Saturday 27 April. Maximum daytime temperature: 7 degrees Celsius; Minimum nighttime temperature: -2 degrees Celsius. Sunny changing to light showers by lunchtime. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; Pollen: Low.
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Sunday 28 April. Maximum daytime temperature: 7 degrees Celsius; Minimum nighttime temperature: 0 degrees Celsius. Sunny changing to cloudy by late morning. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; Pollen: Low.Sunday 28 April. Maximum daytime temperature: 7 degrees Celsius; Minimum nighttime temperature: 0 degrees Celsius. Sunny changing to cloudy by late morning. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; Pollen: Low.
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Monday 29 April. Maximum daytime temperature: 8 degrees Celsius; Minimum nighttime temperature: 3 degrees Celsius. Overcast changing to light rain by lunchtime. Sunrise: ; Sunset: . UV: Moderate; No pollen data.Monday 29 April. Maximum daytime temperature: 8 degrees Celsius; Minimum nighttime temperature: 3 degrees Celsius. Overcast changing to light rain by lunchtime. Sunrise: ; Sunset: . UV: Moderate; No pollen data.
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Tuesday 30 April. Maximum daytime temperature: 9 degrees Celsius; Minimum nighttime temperature: 3 degrees Celsius. Light rain changing to cloudy by late morning. Sunrise: ; Sunset: . UV: Moderate;Tuesday 30 April. Maximum daytime temperature: 9 degrees Celsius; Minimum nighttime temperature: 3 degrees Celsius. Light rain changing to cloudy by late morning. Sunrise: ; Sunset: . UV: Moderate;
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Wednesday 1 May. Maximum daytime temperature: 11 degrees Celsius; Minimum nighttime temperature: 3 degrees Celsius. Sunny changing to cloudy by nighttime. Sunrise: ; Sunset: . UV: Moderate;Wednesday 1 May. Maximum daytime temperature: 11 degrees Celsius; Minimum nighttime temperature: 3 degrees Celsius. Sunny changing to cloudy by nighttime. Sunrise: ; Sunset: . UV: Moderate;
Seven day forecast for Slieve Gallion
| Time | 03:00 | 04:00 | 05:00 | 06:00 | 07:00 | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 | 20:00 | 21:00 | 22:00 | 23:00 |
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Chance of precipitation
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<5% | 10% | 10% | 30% | 30% | 60% | 10% | 20% | 10% | 10% | 10% | 10% | 10% | 10% | 10% | <5% | <5% | <5% | <5% | <5% | <5% |
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3°
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3°
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3°
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3°
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3°
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3°
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3°
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3°
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3°
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3°
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4°
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4°
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5°
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5°
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5°
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4°
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4°
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3°
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3°
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2°
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2°
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-2° | -3° | -3° | -3° | -3° | -2° | -1° | -1° | -2° | -1° | 0° | 0° | 1° | 1° | 1° | 0° | 0° | -1° | -2° | -2° | -2° |
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WNW
13
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WNW
18
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WNW
20
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WNW
19
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NW
17
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NW
15
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NNW
11
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N
13
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NNE
14
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N
11
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N
13
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N
13
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N
13
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N
11
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NNE
12
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NNE
13
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NNE
13
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NNE
14
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N
14
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N
15
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N
14
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20 | 26 | 27 | 26 | 22 | 19 | 14 | 17 | 19 | 17 | 19 | 18 | 19 | 17 | 18 | 19 | 19 | 21 | 22 | 23 | 23 |
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G | G | VG | VG | M | P | G | G | M | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG |
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Humidity
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90% | 90% | 90% | 90% | 96% | 97% | 95% | 90% | 92% | 83% | 74% | 69% | 62% | 59% | 61% | 64% | 65% | 69% | 75% | 78% | 79% |
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UV
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- | - | - | - | 1 | 1 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 1 | 1 | 1 | - | - | - |
| Time | 00:00 | 01:00 | 02:00 | 03:00 | 04:00 | 05:00 | 06:00 | 07:00 | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 | 20:00 | 21:00 | 22:00 | 23:00 |
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Chance of precipitation
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<5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | 20% | 20% | 10% | 10% | 10% | 40% | 30% | 30% | <5% | <5% | <5% | <5% | <5% | <5% |
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2°
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2°
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2°
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2°
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1°
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1°
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1°
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0°
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1°
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2°
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3°
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3°
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4°
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4°
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4°
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4°
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4°
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3°
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4°
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4°
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3°
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2°
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1°
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1°
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-2° | -2° | -2° | -1° | -1° | -2° | -3° | -3° | -2° | -1° | 1° | 0° | 1° | 2° | 1° | 1° | 1° | 0° | 1° | 0° | -1° | -2° | -3° | -3° |
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NNE
12
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N
11
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N
8
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N
7
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N
6
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NE
7
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NE
8
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NE
8
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NE
7
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ENE
7
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NE
6
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ENE
8
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NE
8
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ENE
7
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NE
9
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NE
9
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NE
8
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NNE
8
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N
8
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NE
10
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NNE
10
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N
11
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N
10
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N
10
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20 | 17 | 12 | 11 | 9 | 11 | 12 | 11 | 11 | 11 | 11 | 14 | 14 | 13 | 15 | 15 | 14 | 14 | 14 | 17 | 18 | 18 | 17 | 15 |
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VG | VG | VG | VG | VG | VG | VG | M | VG | VG | VG | M | VG | VG | VG | VG | G | M | VG | VG | VG | VG | VG | VG |
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Humidity
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81% | 82% | 81% | 82% | 84% | 88% | 92% | 95% | 91% | 87% | 82% | 82% | 80% | 74% | 77% | 79% | 78% | 80% | 76% | 71% | 76% | 84% | 89% | 90% |
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UV
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- | - | - | - | - | - | - | 1 | 2 | 2 | 3 | 3 | 4 | 4 | 4 | 3 | 3 | 2 | 2 | 1 | 1 | - | - | - |
| Time | 00:00 | 01:00 | 04:00 | 07:00 | 10:00 | 13:00 | 16:00 | 19:00 | 22:00 |
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| Weather symbols |
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Chance of precipitation
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<5% | <5% | <5% | <5% | <5% | 30% | 30% | 30% | 10% |
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0°
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0°
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-2°
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0°
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4°
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6°
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6°
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5°
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1°
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-3° | -4° | -5° | -3° | 2° | 5° | 5° | 3° | -1° |
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N
9
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NNW
8
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NW
6
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NW
6
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NNE
5
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ENE
4
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NE
4
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NNE
5
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N
6
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15 | 13 | 9 | 9 | 13 | 12 | 11 | 11 | 11 |
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VG | VG | VG | VG | VG | VG | VG | VG | VG |
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Humidity
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91% | 92% | 95% | 96% | 73% | 67% | 65% | 78% | 96% |
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UV
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- | - | - | 1 | 3 | 4 | 3 | 1 | - |
| Time | 01:00 | 04:00 | 07:00 | 10:00 | 13:00 | 16:00 | 19:00 | 22:00 |
|---|---|---|---|---|---|---|---|---|
| Weather symbols |
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Chance of precipitation
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<5% | <5% | <5% | 10% | 10% | 10% | 10% | 10% |
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0°
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-1°
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0°
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5°
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6°
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7°
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6°
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3°
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-3° | -4° | -3° | 2° | 4° | 4° | 3° | 0° |
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NNW
6
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NW
7
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NW
7
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NNW
7
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NW
8
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WNW
10
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W
9
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WSW
8
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10 | 11 | 12 | 17 | 18 | 20 | 18 | 13 |
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VG | G | M | VG | VG | VG | VG | VG |
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Humidity
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97% | 98% | 97% | 77% | 66% | 63% | 71% | 93% |
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UV
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- | - | 1 | 3 | 4 | 3 | 1 | - |
| Time | 01:00 | 04:00 | 07:00 | 10:00 | 13:00 | 16:00 | 19:00 | 22:00 |
|---|---|---|---|---|---|---|---|---|
| Weather symbols |
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Chance of precipitation
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10% | 10% | 10% | 10% | 50% | 50% | 50% | 50% |
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1°
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1°
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2°
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5°
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7°
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8°
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7°
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5°
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-2° | -3° | -2° | 1° | 4° | 4° | 3° | 1° |
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SW
9
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SW
9
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SSW
10
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S
12
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S
14
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S
14
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SSE
14
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SSE
13
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15 | 16 | 17 | 23 | 28 | 28 | 26 | 24 |
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G | G | G | G | G | G | G | G |
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Humidity
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97% | 97% | 97% | 89% | 81% | 82% | 90% | 95% |
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UV
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- | - | 1 | 2 | 3 | 2 | 1 | - |
| Time | 01:00 | 04:00 | 07:00 | 10:00 | 13:00 | 16:00 | 19:00 | 22:00 |
|---|---|---|---|---|---|---|---|---|
| Weather symbols |
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Chance of precipitation
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50% | 50% | 50% | 20% | 50% | 50% | 10% | 10% |
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4°
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4°
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4°
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7°
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8°
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9°
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8°
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6°
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1° | 0° | 1° | 3° | 5° | 6° | 6° | 4° |
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SSE
13
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SE
13
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SSE
12
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SE
13
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SE
14
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SE
12
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ESE
10
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ENE
10
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24 | 24 | 23 | 27 | 29 | 25 | 20 | 18 |
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G | G | G | G | VG | VG | VG | G |
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Humidity
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97% | 98% | 98% | 89% | 77% | 77% | 77% | 88% |
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UV
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- | - | 1 | 2 | 4 | 3 | 1 | - |
| Time | 01:00 | 04:00 | 07:00 | 10:00 | 13:00 | 16:00 | 19:00 | 22:00 |
|---|---|---|---|---|---|---|---|---|
| Weather symbols |
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Chance of precipitation
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10% | 10% | 10% | 10% | 10% | 10% | 10% | 10% |
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5°
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4°
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4°
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7°
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10°
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10°
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10°
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7°
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2° | 2° | 2° | 5° | 8° | 8° | 7° | 4° |
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ESE
9
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SW
9
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N
8
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NE
9
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NE
10
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ENE
10
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WNW
9
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NNW
9
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16 | 16 | 16 | 19 | 22 | 21 | 19 | 17 |
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G | G | G | VG | VG | VG | VG | VG |
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Humidity
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96% | 97% | 98% | 87% | 77% | 76% | 78% | 88% |
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UV
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- | - | 1 | 3 | 4 | 3 | 2 | - |
Our weather symbols tell you the weather conditions for any given hour in the day or night. This means that the symbol for 9am shows you what you will see from 9am to 10am.
Chance of precipitation represents how likely it is that rain (or other types of precipitation, such as sleet, snow, hail or drizzle) will fall from the sky at a certain time.
This number shows the air temperature for the time period. You can see the temperature in Celsius or Fahrenheit by using the dropdown menu.
Feels like temperature considers other factors, such as wind speed and humidity. This gives you a better idea of how the temperature will actually feel at the time.
Wind gust shows the highest wind speed that you should encounter at that time, as winds peak and lull.
Strong winds are shown in bold for speeds of 29 mph or more.
The arrow shows the direction the wind is blowing. The letters show the direction the wind is blowing from (on a standard 16-point compass).
The number represents the average wind speed expected at that time.
The arrow shows the direction of the wind (up is north). If the arrow points from land to sea, the wind will be blowing out to sea (‘offshore’). The number is the average wind speed.
Beware of offshore winds if you are using inflatables, paddle boards or kayaks. These winds can blow you out to sea. Read more about how wind will affect you at the beach.
Visibility measures the distance at which an object can be clearly seen.
| VP (Very Poor) | Less than 1 km |
| P (Poor) | 1.1 km to 4 km |
| M (Moderate) | 4.1 km to 10 km |
| G (Good) | 10.1 km to 20 km |
| VG (Very Good) | 20.1 km to 40 km |
| E (Excellent) | Greater than 40 km |
Humidity is the amount of water vapor in the air. If there is a lot of water vapour, the humidity will be high. The higher the percentage of humidity, the wetter it will feel outside.
UV exposure index and the protection required to help keep you safe:
No risk of UV - It’s safe to stay outside. Low - You can safely stay outside. Consider sunscreen in direct sunlight. Moderate - Take care during midday hours and do not spend too much time in the sun unprotected. Sunscreen advised. High - Seek shade during midday hours, cover up and wear sunscreen. Very high - Spend time in the shade between 11am and 3pm. Shirt, sunscreen and hat are essential. Extreme - Avoid being outside during midday hours. Shirt, sunscreen and hat essential.
This is the average height of the waves, 1-2 miles out to sea. The height of the waves can vary. The individual waves out to sea or at the beach can be higher than this number. If you are close to the water, keep an eye on the waves to stop you or your belongings being swept away.
Read more about calculating the expected height of the waves at the beach.
This is the average number of seconds between one wave and the next, 1-2 miles out to sea. A long wave period (more than 10 seconds) means the waves at the beach may be more powerful. Lifeguards can give you advice on waves if you’re planning to go into the water.
Read more about the period of waves.
The arrow shows the average direction of the waves 1-2 miles out to sea. It indicates how sheltered the beach will be from these waves. If the arrow points towards land, most of the waves’ power will reach the beach. If the arrow is parallel to or pointing away from land, the wave height is likely to be lower on the beach than it is offshore.
Lifeguards can give you advice on waves if you’re planning to go into the water.
Forecast row information
UK video forecast
Northern Ireland weather forecast
Headline:
Mainly dry with sunny spells. A few light showers
This Evening and Tonight:
A fine end to the day with some evening sunshine. It remains mainly dry overnight with a touch of frost or fog patches possible in places. However, cloud is expected to increase towards dawn with the odd light shower. Minimum temperature 2 °C.
Thursday:
A bright and largely dry day for most people with some sunny spells, although the cloud may be thick enough for the odd shower, especially in the south and west. Maximum temperature 12 °C.
Outlook for Friday to Sunday:
Somewhat cloudy through Friday and Saturday with a few brighter developing spells between showers. A good chance of staying dry and bright Sunday, but showers may push into eastern areas.
Updated:
UK long range weather forecast
The weekend's rain probably clearing east and northeast to leave a drier day on Monday, although the chance of showers and even thunderstorms remains. Cloudier, wetter weather is likely to quickly arrive into the west, and slide east across southern areas early next week, such that the majority of the week will be characterised by wetter weather in southern UK, drier weather in northern, especially northwestern UK, and a chance of rain or even thundery showers for a time in the east. Temperatures likely to trend upwards, with the chance of a warm to very warm spell in some southern and eastern parts, before conditions probably turn drier, cooler and more settled from the west towards the end of the period.
Updated:
In this period, the chances of unsettled weather are slightly less than usual in the north and about the same as usual further south. Therefore, some spells of wetter weather are likely for all, but perhaps especially southern areas with the driest conditions probably further north. Temperatures probably near average though with some cooler interludes possible. Also worth noting that average temperatures themselves rise by around 1C per week at this time of year.
Updated:
