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Changeable weather to continue for most
An autumnal mix of wind and rain is on the cards for much of the UK over the next 10 days, albeit with some interludes of calmer weather.
Read moreTreharris (Merthyr Tydfil) weather
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Forecast days
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Today. Maximum daytime temperature: 15 degrees Celsius; Minimum nighttime temperature: 6 degrees Celsius. Cloudy changing to light showers by late morning. Sunrise: 07:23; Sunset: 18:38. UV: Low; Pollution: Low; No pollen data.
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Saturday 8 October. Maximum daytime temperature: 14 degrees Celsius; Minimum nighttime temperature: 7 degrees Celsius. Clear. Sunrise: 07:25; Sunset: 18:36. UV: Moderate; Pollution: Low; No pollen data.
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Sunday 9 October. Maximum daytime temperature: 15 degrees Celsius; Minimum nighttime temperature: 9 degrees Celsius. Cloudy. Sunrise: 07:26; Sunset: 18:34. UV: Low; Pollution: Low; No pollen data.
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Monday 10 October. Maximum daytime temperature: 14 degrees Celsius; Minimum nighttime temperature: 5 degrees Celsius. Partly cloudy changing to sunny by late morning. Sunrise: 07:28; Sunset: 18:31. UV: Moderate; Pollution: Low; No pollen data.
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Tuesday 11 October. Maximum daytime temperature: 13 degrees Celsius; Minimum nighttime temperature: 7 degrees Celsius. Cloudy changing to sunny intervals by late morning. Sunrise: 07:30; Sunset: 18:29. UV: Low; Pollution: Low; No pollen data.
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Wednesday 12 October. Maximum daytime temperature: 14 degrees Celsius; Minimum nighttime temperature: 10 degrees Celsius. Overcast. Sunrise: 07:32; Sunset: 18:27. UV: Low;
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Thursday 13 October. Maximum daytime temperature: 15 degrees Celsius; Minimum nighttime temperature: 11 degrees Celsius. Light rain changing to cloudy by late morning. Sunrise: 07:33; Sunset: 18:25. UV: Low;
Seven day forecast for Treharris
| Time | 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 symbol |
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Chance of precipitation
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10% | 10% | 50% | 20% | 40% | 40% | 50% | 50% | 40% | 80% | 70% | 40% | 30% | <5% | <5% | <5% | <5% | <5% | <5% |
|
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13°
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13°
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13°
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13°
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13°
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14°
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14°
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14°
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14°
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14°
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13°
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13°
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13°
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12°
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11°
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11°
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10°
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10°
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9°
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11° | 11° | 11° | 11° | 11° | 12° | 12° | 12° | 12° | 12° | 11° | 11° | 11° | 11° | 10° | 9° | 8° | 8° | 7° |
|
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WSW
11
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SW
10
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SW
9
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SW
9
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SW
11
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SW
11
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SW
13
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SW
14
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SW
15
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WSW
16
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W
12
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W
11
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W
11
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W
9
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W
8
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W
9
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WNW
9
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WNW
9
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WNW
8
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27 | 25 | 24 | 25 | 27 | 26 | 28 | 30 | 32 | 33 | 27 | 24 | 24 | 21 | 21 | 22 | 23 | 23 | 22 |
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VG | VG | G | VG | VG | G | VG | VG | VG | G | G | VG | VG | VG | VG | VG | E | VG | E |
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Humidity
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88% | 88% | 90% | 91% | 90% | 88% | 84% | 82% | 84% | 85% | 88% | 87% | 83% | 81% | 82% | 80% | 80% | 81% | 82% |
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UV
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- | - | - | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 1 | 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 symbol |
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Chance of precipitation
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<5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% |
|
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9°
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9°
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8°
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8°
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7°
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7°
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7°
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7°
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7°
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9°
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10°
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12°
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13°
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14°
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14°
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14°
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14°
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13°
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12°
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9°
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9°
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8°
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8°
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8°
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7° | 6° | 6° | 6° | 6° | 6° | 5° | 5° | 6° | 8° | 10° | 11° | 12° | 12° | 13° | 12° | 12° | 12° | 11° | 9° | 8° | 7° | 7° | 7° |
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WNW
8
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WNW
9
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WNW
9
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WNW
7
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WNW
6
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WNW
6
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NW
5
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NW
5
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NW
5
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NW
4
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WNW
4
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WNW
5
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WNW
6
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W
6
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W
6
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W
7
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WSW
7
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WSW
6
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WSW
5
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WSW
3
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WSW
3
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SW
3
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SSE
3
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S
4
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22 | 23 | 23 | 20 | 19 | 18 | 17 | 16 | 15 | 13 | 10 | 11 | 12 | 13 | 13 | 14 | 14 | 13 | 11 | 9 | 7 | 7 | 6 | 7 |
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E | E | E | VG | VG | VG | VG | VG | VG | VG | VG | VG | E | E | E | E | VG | VG | VG | VG | VG | VG | VG | VG |
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Humidity
|
83% | 84% | 85% | 86% | 89% | 90% | 90% | 90% | 89% | 86% | 80% | 71% | 64% | 58% | 56% | 56% | 56% | 63% | 71% | 81% | 83% | 86% | 87% | 87% |
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UV
|
- | - | - | - | - | - | - | - | 1 | 1 | 1 | 2 | 2 | 3 | 2 | 2 | 1 | 1 | 1 | - | - | - | - | - |
| Time | 00:00 | 01:00 | 04:00 | 07:00 | 10:00 | 13:00 | 16:00 | 19:00 | 22:00 |
|---|---|---|---|---|---|---|---|---|---|
| Weather symbol |
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Chance of precipitation
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<5% | <5% | <5% | <5% | <5% | 10% | 10% | 10% | 10% |
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8°
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8°
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8°
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8°
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11°
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14°
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14°
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12°
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12°
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7° | 6° | 6° | 6° | 9° | 11° | 12° | 11° | 10° |
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SSE
4
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SSE
4
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S
6
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S
8
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S
10
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SSW
14
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SSW
12
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SSW
8
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SSW
7
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8 | 10 | 13 | 16 | 22 | 28 | 24 | 17 | 15 |
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VG | G | G | G | VG | VG | VG | VG | G |
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Humidity
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88% | 89% | 94% | 94% | 84% | 68% | 67% | 80% | 90% |
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UV
|
- | - | - | - | 1 | 2 | 1 | - | - |
| Time | 01:00 | 04:00 | 07:00 | 10:00 | 13:00 | 16:00 | 19:00 | 22:00 |
|---|---|---|---|---|---|---|---|---|
| Weather symbol |
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Chance of precipitation
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20% | 50% | 10% | <5% | <5% | <5% | <5% | <5% |
|
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12°
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11°
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10°
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11°
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13°
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13°
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10°
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8°
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10° | 10° | 8° | 9° | 11° | 12° | 8° | 6° |
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SW
6
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W
6
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NNW
7
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NNW
7
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NNW
8
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NNW
8
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NNW
5
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NNW
5
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12 | 13 | 13 | 15 | 18 | 17 | 11 | 10 |
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G | G | VG | VG | VG | VG | VG | VG |
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Humidity
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92% | 93% | 89% | 78% | 64% | 60% | 74% | 82% |
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UV
|
- | - | - | 1 | 3 | 1 | - | - |
| Time | 01:00 | 04:00 | 07:00 | 10:00 | 13:00 | 16:00 | 19:00 | 22:00 |
|---|---|---|---|---|---|---|---|---|
| Weather symbol |
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Chance of precipitation
|
<5% | <5% | <5% | <5% | <5% | <5% | 10% | <5% |
|
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6°
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6°
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5°
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10°
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12°
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13°
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10°
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9°
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5° | 5° | 4° | 9° | 12° | 12° | 10° | 8° |
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NNW
4
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NW
4
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NW
4
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NNW
3
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SW
5
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WSW
5
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SSW
4
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SW
3
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8 | 7 | 6 | 7 | 13 | 12 | 8 | 6 |
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VG | VG | VG | VG | VG | VG | VG | VG |
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Humidity
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86% | 87% | 90% | 79% | 65% | 65% | 79% | 86% |
|
UV
|
- | - | - | 1 | 2 | 1 | - | - |
| Time | 01:00 | 04:00 | 07:00 | 10:00 | 13:00 | 16:00 | 19:00 | 22:00 |
|---|---|---|---|---|---|---|---|---|
| Weather symbol |
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Chance of precipitation
|
10% | 10% | 10% | 10% | 10% | 20% | 20% | 20% |
|
|
8°
|
8°
|
8°
|
11°
|
13°
|
13°
|
12°
|
11°
|
|
|
7° | 7° | 7° | 10° | 11° | 12° | 11° | 10° |
|
|
W
4
|
WNW
4
|
WNW
5
|
SSW
6
|
SSW
9
|
SW
9
|
SW
7
|
SW
6
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|
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7 | 8 | 9 | 12 | 18 | 19 | 15 | 13 |
|
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VG | G | G | G | G | G | G | G |
|
Humidity
|
89% | 91% | 93% | 87% | 83% | 84% | 90% | 93% |
|
UV
|
- | - | - | 1 | 2 | 1 | - | - |
| Time | 01:00 | 04:00 | 07:00 | 10:00 | 13:00 | 16:00 | 19:00 | 22:00 |
|---|---|---|---|---|---|---|---|---|
| Weather symbol |
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Chance of precipitation
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20% | 20% | 40% | 20% | 20% | 20% | 20% | 50% |
|
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11°
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11°
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10°
|
12°
|
14°
|
14°
|
13°
|
12°
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10° | 10° | 9° | 11° | 12° | 13° | 11° | 11° |
|
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WSW
6
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WSW
6
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NNW
5
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WNW
7
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SW
8
|
SW
9
|
SW
9
|
SW
9
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11 | 11 | 11 | 14 | 18 | 19 | 17 | 19 |
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G | M | M | G | G | G | G | G |
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Humidity
|
95% | 95% | 95% | 92% | 86% | 84% | 89% | 92% |
|
UV
|
- | - | - | 1 | 2 | 1 | - | - |
Chance of precipitation represents how likely it is that rain (or other types of precipitation, such as sleet, snow, hail and 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.
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 (Medium) | 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.
weather map
Treharris
Detailed weather map
Forecast for HH:mm, EEE
Updated HH:mm (ZZZZ) on EEE dd MMM yyyy
Loading map…
Wales weather forecast
Headline:
Heavy rain and wind followed by sunshine and blustery showers.
Today:
Bright spells with showers, mostly light, to start. A band of heavy rain and strong wind will arrive in the northwest by mid-morning, moving southeastwards, with sunshine and heavy blustery showers to follow. Winds easing a little inland later. Maximum temperature 17 °C.
Tonight:
Scattered cloud and isolated showers, including heavier ones, will continue to drift into Wales in a north-westerly breeze, which will remain strong in coastal parts at times. Winds easing later. Minimum temperature 6 °C.
Saturday:
A chilly, clear start. Mostly blue skies throughout the day, with patches of fair weather cloud bubbling up here and there. Feeling fairly warm in the sunshine with light winds. Maximum temperature 18 °C.
Outlook for Sunday to Tuesday:
Cloudier on Sunday with rain and wind arriving Sunday evening. Drier with sunshine on Monday and a similar theme, though cloudier, on Tuesday. Mostly mild, but chilly at night initially.
Updated:
UK long range weather forecast
This period is likely to be characterised by unsettled weather with showers and longer periods of rain for most areas. Largely a dry, cloudy Tuesday for all with the chance of patchy rain developing over the northwest later in the day. For the remainder of the period, further bands of rain are expected across the country with drier spells between them. Overall the west and northwest seeing the heaviest and most frequent rain, whilst the east will experience more dry sunny spells. Rain is likely to be accompanied by strong winds with a risk of gales in exposed regions of the northwest throughout. Temperatures generally near normal, with the occasional cooler night bringing the chance of mist and fog in places.
Updated:
Changeable conditions are expected to continue throughout the period, with bands of rain and showers likely across most of the country. Temperatures are likely to remain near to normal overall throughout. However, there is an increasing chance of some more settled weather from late October, although it may also be accompanied by colder conditions with mist or fog and frost.
Updated:
