Slieve Gallion (County Londonderry) weather
Find a forecast
Forecast days
-
Today. Maximum daytime temperature: 9 degrees Celsius; Minimum nighttime temperature: 6 degrees Celsius. Overcast. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; Pollen: Moderate.Today. Maximum daytime temperature: 9 degrees Celsius; Minimum nighttime temperature: 6 degrees Celsius. Overcast. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; Pollen: Moderate.
-
Tuesday 18 June. Maximum daytime temperature: 9 degrees Celsius; Minimum nighttime temperature: 4 degrees Celsius. Cloudy changing to sunny intervals by early evening. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; Pollen: Moderate.Tuesday 18 June. Maximum daytime temperature: 9 degrees Celsius; Minimum nighttime temperature: 4 degrees Celsius. Cloudy changing to sunny intervals by early evening. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; Pollen: Moderate.
-
Wednesday 19 June. Maximum daytime temperature: 13 degrees Celsius; Minimum nighttime temperature: 7 degrees Celsius. Sunny intervals changing to cloudy by late morning. Sunrise: ; Sunset: . UV: High; Pollution: Low; Pollen: High.Wednesday 19 June. Maximum daytime temperature: 13 degrees Celsius; Minimum nighttime temperature: 7 degrees Celsius. Sunny intervals changing to cloudy by late morning. Sunrise: ; Sunset: . UV: High; Pollution: Low; Pollen: High.
-
Thursday 20 June. Maximum daytime temperature: 15 degrees Celsius; Minimum nighttime temperature: 8 degrees Celsius. Overcast. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; Pollen: High.Thursday 20 June. Maximum daytime temperature: 15 degrees Celsius; Minimum nighttime temperature: 8 degrees Celsius. Overcast. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; Pollen: High.
-
Friday 21 June. Maximum daytime temperature: 14 degrees Celsius; Minimum nighttime temperature: 8 degrees Celsius. Cloudy changing to light rain by late morning. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; Pollen: High.Friday 21 June. Maximum daytime temperature: 14 degrees Celsius; Minimum nighttime temperature: 8 degrees Celsius. Cloudy changing to light rain by late morning. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; Pollen: High.
-
Saturday 22 June. Maximum daytime temperature: 13 degrees Celsius; Minimum nighttime temperature: 8 degrees Celsius. Overcast. Sunrise: ; Sunset: . UV: Moderate;Saturday 22 June. Maximum daytime temperature: 13 degrees Celsius; Minimum nighttime temperature: 8 degrees Celsius. Overcast. Sunrise: ; Sunset: . UV: Moderate;
-
Sunday 23 June. Maximum daytime temperature: 14 degrees Celsius; Minimum nighttime temperature: 8 degrees Celsius. Overcast. Sunrise: ; Sunset: . UV: Moderate;Sunday 23 June. Maximum daytime temperature: 14 degrees Celsius; Minimum nighttime temperature: 8 degrees Celsius. Overcast. Sunrise: ; Sunset: . UV: Moderate;
Seven day forecast for Slieve Gallion
| Time | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Weather symbols |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Chance of precipitation
|
10% | 10% | 10% | 40% | 10% | 10% | 10% | 10% | 10% | 10% | 10% | 10% | 10% | 10% | 10% |
|
|
8°
|
8°
|
8°
|
8°
|
8°
|
9°
|
9°
|
9°
|
9°
|
9°
|
8°
|
8°
|
7°
|
7°
|
7°
|
|
|
4° | 4° | 4° | 4° | 5° | 5° | 5° | 5° | 4° | 5° | 4° | 4° | 3° | 2° | 2° |
|
|
NNW
16
|
NNW
17
|
NNW
19
|
NNW
19
|
NNW
18
|
NNW
18
|
NNW
19
|
NNW
19
|
NNW
21
|
NNW
19
|
NNW
19
|
NNW
19
|
NNW
19
|
NNW
19
|
NNW
19
|
|
|
22 | 22 | 24 | 25 | 24 | 25 | 25 | 26 | 28 | 28 | 28 | 27 | 27 | 27 | 27 |
|
|
M | G | G | M | G | VG | VG | G | G | G | G | G | G | M | M |
|
Humidity
|
99% | 96% | 96% | 96% | 93% | 88% | 88% | 90% | 92% | 90% | 92% | 90% | 94% | 95% | 96% |
|
UV
|
3 | 3 | 4 | 5 | 5 | 4 | 4 | 3 | 3 | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Weather symbols |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Chance of precipitation
|
10% | 10% | 10% | 10% | 10% | 10% | 50% | 10% | 10% | 40% | 10% | 10% | 10% | 10% | 10% | 10% | 10% | <5% | <5% | <5% | <5% | <5% | <5% | <5% |
|
|
6°
|
6°
|
6°
|
6°
|
6°
|
6°
|
6°
|
6°
|
7°
|
7°
|
7°
|
8°
|
8°
|
8°
|
8°
|
9°
|
9°
|
9°
|
8°
|
8°
|
7°
|
7°
|
6°
|
6°
|
|
|
2° | 2° | 2° | 1° | 1° | 1° | 2° | 2° | 2° | 3° | 3° | 3° | 4° | 4° | 4° | 5° | 5° | 5° | 4° | 4° | 3° | 3° | 2° | 1° |
|
|
NNW
18
|
NNW
18
|
NNW
18
|
NW
18
|
NW
18
|
NNW
19
|
NNW
19
|
NNW
19
|
NNW
20
|
NNW
20
|
NNW
19
|
NNW
20
|
NNW
19
|
NNW
20
|
N
20
|
N
20
|
N
20
|
N
20
|
NNW
20
|
NNW
20
|
NNW
19
|
NNW
18
|
NNW
18
|
NNW
17
|
|
|
26 | 25 | 26 | 26 | 26 | 27 | 27 | 27 | 29 | 29 | 29 | 31 | 30 | 31 | 30 | 32 | 32 | 31 | 31 | 30 | 29 | 28 | 27 | 27 |
|
|
G | M | M | G | G | M | P | M | M | M | M | G | G | G | G | VG | VG | VG | VG | VG | VG | VG | VG | VG |
|
Humidity
|
96% | 96% | 96% | 95% | 96% | 96% | 96% | 96% | 95% | 93% | 91% | 89% | 86% | 84% | 85% | 80% | 77% | 76% | 76% | 76% | 79% | 83% | 87% | 88% |
|
UV
|
- | - | - | - | - | 1 | 1 | 1 | 2 | 2 | 3 | 3 | 4 | 5 | 4 | 4 | 4 | 3 | 2 | 1 | 1 | 1 | - | - |
| Time | 00:00 | 01:00 | 04:00 | 07:00 | 10:00 | 13:00 | 16:00 | 19:00 | 22:00 |
|---|---|---|---|---|---|---|---|---|---|
| Weather symbols |
|
|
|
|
|
|
|
|
|
|
Chance of precipitation
|
<5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% |
|
|
5°
|
5°
|
4°
|
6°
|
8°
|
12°
|
13°
|
12°
|
9°
|
|
|
1° | 1° | 1° | 3° | 7° | 10° | 11° | 9° | 6° |
|
|
NNW
16
|
NNW
15
|
NW
11
|
NW
8
|
WNW
7
|
WSW
9
|
WSW
12
|
W
14
|
W
13
|
|
|
25 | 23 | 16 | 14 | 16 | 19 | 24 | 26 | 20 |
|
|
VG | VG | VG | VG | VG | VG | VG | VG | VG |
|
Humidity
|
89% | 89% | 91% | 89% | 77% | 67% | 67% | 69% | 87% |
|
UV
|
- | - | - | 1 | 5 | 7 | 5 | 1 | - |
| Time | 01:00 | 04:00 | 07:00 | 10:00 | 13:00 | 16:00 | 19:00 | 22:00 |
|---|---|---|---|---|---|---|---|---|
| Weather symbols |
|
|
|
|
|
|
|
|
|
Chance of precipitation
|
10% | 10% | 10% | 10% | 10% | 10% | 10% | 10% |
|
|
7°
|
7°
|
8°
|
10°
|
13°
|
14°
|
14°
|
11°
|
|
|
4° | 4° | 6° | 8° | 11° | 12° | 12° | 9° |
|
|
W
13
|
WSW
11
|
WSW
10
|
WSW
9
|
WSW
10
|
WSW
10
|
WSW
10
|
SW
12
|
|
|
19 | 17 | 17 | 17 | 20 | 21 | 19 | 18 |
|
|
G | G | G | G | VG | G | VG | VG |
|
Humidity
|
95% | 96% | 95% | 89% | 79% | 74% | 76% | 90% |
|
UV
|
- | - | 1 | 3 | 5 | 4 | 1 | 1 |
| Time | 01:00 | 04:00 | 07:00 | 10:00 | 13:00 | 16:00 | 19:00 | 22:00 |
|---|---|---|---|---|---|---|---|---|
| Weather symbols |
|
|
|
|
|
|
|
|
|
Chance of precipitation
|
10% | 10% | 10% | 50% | 40% | 20% | 40% | 10% |
|
|
10°
|
9°
|
10°
|
12°
|
13°
|
14°
|
13°
|
10°
|
|
|
7° | 6° | 7° | 9° | 11° | 11° | 10° | 7° |
|
|
SW
13
|
SW
14
|
SW
15
|
SW
16
|
SW
17
|
SW
17
|
WSW
17
|
SW
17
|
|
|
20 | 22 | 25 | 28 | 30 | 32 | 30 | 27 |
|
|
G | G | G | G | G | VG | VG | VG |
|
Humidity
|
96% | 97% | 96% | 88% | 80% | 75% | 77% | 88% |
|
UV
|
- | - | 1 | 3 | 5 | 4 | 1 | 1 |
| Time | 01:00 | 04:00 | 07:00 | 10:00 | 13:00 | 16:00 | 19:00 | 22:00 |
|---|---|---|---|---|---|---|---|---|
| Weather symbols |
|
|
|
|
|
|
|
|
|
Chance of precipitation
|
10% | 20% | 20% | 20% | 20% | 20% | 20% | 20% |
|
|
9°
|
9°
|
9°
|
11°
|
12°
|
12°
|
12°
|
10°
|
|
|
6° | 5° | 6° | 7° | 9° | 9° | 9° | 7° |
|
|
SW
18
|
SW
18
|
SW
18
|
SW
18
|
WSW
20
|
WSW
20
|
W
19
|
WSW
18
|
|
|
27 | 28 | 29 | 33 | 36 | 36 | 33 | 28 |
|
|
G | G | G | G | G | G | VG | G |
|
Humidity
|
93% | 94% | 93% | 87% | 80% | 79% | 80% | 87% |
|
UV
|
- | - | 1 | 3 | 5 | 3 | 1 | 1 |
| Time | 01:00 | 04:00 | 07:00 | 10:00 | 13:00 | 16:00 | 19:00 | 22:00 |
|---|---|---|---|---|---|---|---|---|
| Weather symbols |
|
|
|
|
|
|
|
|
|
Chance of precipitation
|
20% | 20% | 20% | 10% | 10% | 10% | 10% | 10% |
|
|
9°
|
9°
|
9°
|
11°
|
13°
|
14°
|
13°
|
11°
|
|
|
6° | 6° | 6° | 8° | 10° | 11° | 11° | 8° |
|
|
WSW
17
|
W
17
|
WSW
15
|
W
14
|
W
15
|
W
14
|
W
13
|
WSW
13
|
|
|
27 | 26 | 24 | 26 | 28 | 27 | 24 | 20 |
|
|
G | G | G | G | VG | VG | VG | G |
|
Humidity
|
92% | 93% | 93% | 84% | 75% | 73% | 75% | 87% |
|
UV
|
- | - | 1 | 3 | 5 | 4 | 1 | 1 |
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:
A mainly dry but cloudy and cool day.
Today:
A few light showers in the north at first this morning, otherwise a cloudy but dry and cool day. The best of any sunny spells are likely over County Down this afternoon. Maximum temperature 16 °C.
Tonight:
Another cloudy night, mainly dry with just the odd shower at first. Clear spells increase from midnight with a few showers building across Northern Counties towards morning. Minimum temperature 8 °C.
Tuesday:
Cloudy, a few early showers north spread to County Down during the morning. The afternoon will soon become dry with increasing sunny periods. Maximum temperature 16 °C.
Outlook for Wednesday to Friday:
A dry and bright day Wednesday with patchy rain spreading east overnight into Thursday. Thursday will soon become dry and bright. Outbreaks of rain spread east Friday.
Updated:
UK long range weather forecast
Following a couple of days of largely fine and settled weather, a gradual transition to more changeable conditions from the Atlantic is likely to take place with periods of cloud, rain and stronger winds most often affecting the west and northwest. There remains a small chance of an area of heavy, thundery rain affecting parts of the south on Friday 21st, possibly accompanied by briefly hot and humid conditions. Into the last week of June, changeable conditions are likely to remains dominant, with the focus for these conditions continuing to be across the north and west, with spells of more settled and drier conditions likely in the south and east. Nationwide, temperatures are expected to be close to or slightly above average.
Updated:
There is little sign for any one type of weather pattern to dominate during this period. As such, typical conditions for the UK are most probable with a mixture of weather types. All areas can expected to see some spells of drier, sunnier weather, but there will also be showers or longer spells of rain at times. Currently the only signals, weak as they are, hint that rain and showers will tend to be more biased towards the north and west, with any more prolonged drier interludes favouring the south. Temperatures are most likely to be close to or slightly above climatological average.
Updated:
