News
Remaining cold with potential for further heavy rain
The colder conditions following Storm Christoph will remain until early next week, when conditions are due to become more unsettled once more
Read moreTreharris (Merthyr Tydfil) weather
Find a forecast
Forecast days
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Today. Maximum daytime temperature: 5 degrees Celsius; Minimum nighttime temperature: -2 degrees Celsius. Heavy rain changing to fog by early evening. Sunrise: 08:06; Sunset: 16:44. UV: Low; Pollution: Low; No pollen data.
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Saturday 23 January. Maximum daytime temperature: 3 degrees Celsius; Minimum nighttime temperature: -4 degrees Celsius. Partly cloudy changing to sunny intervals by late morning. Sunrise: 08:05; Sunset: 16:46. UV: Low; Pollution: Low; No pollen data.
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Sunday 24 January. Maximum daytime temperature: 2 degrees Celsius; Minimum nighttime temperature: -4 degrees Celsius. Light snow changing to cloudy by lunchtime. Sunrise: 08:04; Sunset: 16:48. UV: Low; Pollution: Low; No pollen data.
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Monday 25 January. Maximum daytime temperature: 4 degrees Celsius; Minimum nighttime temperature: -1 degrees Celsius. Clear changing to cloudy by late morning. Sunrise: 08:03; Sunset: 16:49. UV: Low; Pollution: Low; No pollen data.
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Tuesday 26 January. Maximum daytime temperature: 6 degrees Celsius; Minimum nighttime temperature: 5 degrees Celsius. Cloudy changing to light rain by late morning. Sunrise: 08:01; Sunset: 16:51. UV: Low; Pollution: Low; No pollen data.
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Wednesday 27 January. Maximum daytime temperature: 9 degrees Celsius; Minimum nighttime temperature: 7 degrees Celsius. Cloudy changing to light rain in the afternoon. Sunrise: 08:00; Sunset: 16:53. UV: Low;
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Thursday 28 January. Maximum daytime temperature: 9 degrees Celsius; Minimum nighttime temperature: 6 degrees Celsius. Heavy rain. Sunrise: 07:59; Sunset: 16:55. UV: Low;
Seven day forecast for Treharris
Today (22 January 2021)
| Time | Now | 17:00 | 18:00 | 19:00 | 20:00 | 21:00 | 22:00 | 23:00 |
|---|---|---|---|---|---|---|---|---|
| Weather symbol |
|
|
|
|
|
|
|
|
| Chance of precipitation | 90% | 50% | 20% | 20% | <5% | <5% | <5% | <5% |
| Temperature (°C) |
3°
|
2°
|
2°
|
2°
|
1°
|
0°
|
-1°
|
-1°
|
| Feels like temperature (°C) | 0° | -1° | -1° | -1° | -1° | -2° | -3° | -3° |
| Wind direction and speed (miles per hour) |
SSW
6
|
NW
5
|
NW
5
|
WNW
7
|
NW
4
|
NNW
3
|
NNW
3
|
NNW
3
|
| Wind gust (miles per hour) | 8 | 14 | 15 | 17 | 14 | 13 | 12 | 12 |
| Visibility | M | M | VP | P | G | G | G | G |
| Humidity | 91% | 96% | 96% | 96% | 96% | 95% | 95% | 96% |
| UV | 1 | - | - | - | - | - | - | - |
Saturday (23 January 2021)
| 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 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Chance of precipitation | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | 10% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% |
| Temperature (°C) |
-1°
|
-1°
|
-1°
|
-2°
|
-1°
|
-2°
|
-2°
|
-2°
|
-1°
|
0°
|
1°
|
2°
|
2°
|
3°
|
2°
|
2°
|
2°
|
0°
|
-1°
|
-2°
|
-2°
|
-3°
|
-3°
|
-3°
|
| Feels like temperature (°C) | -3° | -3° | -4° | -4° | -4° | -4° | -4° | -4° | -5° | -4° | -3° | -2° | -1° | -1° | -1° | -1° | -2° | -3° | -4° | -4° | -5° | -5° | -5° | -5° |
| Wind direction and speed (miles per hour) |
NNW
3
|
NNW
4
|
NNW
4
|
NNW
3
|
NNW
4
|
NNW
4
|
NW
3
|
NW
4
|
NW
6
|
NW
6
|
NW
7
|
NW
7
|
NW
9
|
NW
10
|
NW
10
|
NW
9
|
NW
7
|
WNW
5
|
WSW
4
|
NW
4
|
NW
3
|
NW
4
|
NW
4
|
NW
4
|
| Wind gust (miles per hour) | 8 | 8 | 10 | 7 | 9 | 11 | 12 | 14 | 17 | 16 | 16 | 15 | 19 | 20 | 19 | 17 | 16 | 16 | 12 | 11 | 9 | 9 | 9 | 9 |
| Visibility | G | G | G | G | G | G | G | G | G | VG | VG | VG | E | E | E | E | E | VG | VG | VG | VG | VG | VG | VG |
| Humidity | 94% | 94% | 93% | 93% | 94% | 93% | 93% | 95% | 94% | 93% | 88% | 82% | 80% | 74% | 74% | 72% | 77% | 83% | 85% | 88% | 89% | 91% | 90% | 89% |
| UV | - | - | - | - | - | - | - | - | - | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | - | - | - | - | - | - | - |
Sunday (24 January 2021)
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| Weather symbol |
|
|
|
|
|
|
|
|
| Chance of precipitation | <5% | 10% | 60% | 60% | 20% | 20% | 20% | 10% |
| Temperature (°C) |
-3°
|
-2°
|
-1°
|
-1°
|
1°
|
2°
|
0°
|
-1°
|
| Feels like temperature (°C) | -5° | -5° | -4° | -4° | -2° | -2° | -3° | -5° |
| Wind direction and speed (miles per hour) |
NW
4
|
SSE
5
|
ESE
6
|
E
6
|
NNE
7
|
NNW
7
|
NW
6
|
NW
8
|
| Wind gust (miles per hour) | 8 | 11 | 16 | 14 | 14 | 16 | 13 | 15 |
| Visibility | VG | VG | G | VP | G | VG | G | VG |
| Humidity | 87% | 84% | 86% | 95% | 87% | 82% | 88% | 88% |
| UV | - | - | - | 1 | 1 | 1 | - | - |
Monday (25 January 2021)
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| Weather symbol |
|
|
|
|
|
|
|
|
| Chance of precipitation | 10% | <5% | 10% | 10% | 10% | 10% | 10% | 10% |
| Temperature (°C) |
-2°
|
-2°
|
-1°
|
-1°
|
3°
|
4°
|
1°
|
0°
|
| Feels like temperature (°C) | -5° | -5° | -4° | -4° | 0° | 1° | -1° | -2° |
| Wind direction and speed (miles per hour) |
NW
7
|
WNW
6
|
WSW
5
|
WSW
5
|
SW
5
|
WSW
6
|
WSW
4
|
WSW
4
|
| Wind gust (miles per hour) | 13 | 11 | 10 | 10 | 12 | 11 | 8 | 8 |
| Visibility | VG | VG | VG | G | VG | VG | G | G |
| Humidity | 89% | 90% | 88% | 92% | 82% | 82% | 92% | 95% |
| UV | - | - | - | 1 | 1 | 1 | - | - |
Tuesday (26 January 2021)
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| Weather symbol |
|
|
|
|
|
|
|
|
| Chance of precipitation | 10% | 20% | 20% | 50% | 60% | 60% | 60% | 50% |
| Temperature (°C) |
0°
|
0°
|
1°
|
2°
|
4°
|
5°
|
5°
|
5°
|
| Feels like temperature (°C) | -3° | -3° | -2° | -1° | 2° | 2° | 2° | 2° |
| Wind direction and speed (miles per hour) |
ENE
5
|
NE
5
|
SW
5
|
SSW
5
|
S
7
|
S
8
|
SSW
9
|
SW
10
|
| Wind gust (miles per hour) | 9 | 9 | 9 | 10 | 14 | 15 | 18 | 20 |
| Visibility | G | G | G | M | M | M | M | M |
| Humidity | 95% | 95% | 95% | 95% | 91% | 94% | 96% | 96% |
| UV | - | - | - | 1 | 1 | 1 | - | - |
Wednesday (27 January 2021)
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| Weather symbol |
|
|
|
|
|
|
|
|
| Chance of precipitation | 50% | 50% | 20% | 20% | 20% | 50% | 60% | 60% |
| Temperature (°C) |
6°
|
6°
|
6°
|
6°
|
8°
|
8°
|
7°
|
7°
|
| Feels like temperature (°C) | 3° | 3° | 3° | 4° | 5° | 6° | 5° | 5° |
| Wind direction and speed (miles per hour) |
SW
10
|
SW
10
|
WSW
9
|
SW
9
|
SW
9
|
SW
8
|
SSW
8
|
S
9
|
| Wind gust (miles per hour) | 20 | 20 | 19 | 17 | 19 | 16 | 15 | 17 |
| Visibility | M | M | M | M | M | M | M | M |
| Humidity | 96% | 96% | 95% | 96% | 94% | 94% | 97% | 97% |
| UV | - | - | - | 1 | 1 | 1 | - | - |
Thursday (28 January 2021)
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| Weather symbol |
|
|
|
|
|
|
|
|
| Chance of precipitation | 60% | 90% | 80% | 60% | 60% | 60% | 50% | 50% |
| Temperature (°C) |
7°
|
8°
|
8°
|
8°
|
8°
|
8°
|
8°
|
7°
|
| Feels like temperature (°C) | 5° | 5° | 5° | 5° | 5° | 5° | 5° | 4° |
| Wind direction and speed (miles per hour) |
S
10
|
SSW
11
|
SW
12
|
WSW
14
|
N
15
|
NNE
14
|
W
12
|
NNE
12
|
| Wind gust (miles per hour) | 21 | 23 | 24 | 27 | 31 | 28 | 25 | 24 |
| Visibility | M | M | M | M | M | M | M | M |
| Humidity | 97% | 97% | 96% | 95% | 93% | 92% | 94% | 94% |
| UV | - | - | - | 1 | 1 | 1 | - | - |
WARNING
Flood warnings
Severe flood warnings in force
for Wales.
Wales weather forecast
Headline:
Scattered wintry showers, mostly in the north and west.
This Evening and Tonight:
Scattered wintry showers turning to snow overnight, accumulating over hills and at lower levels for some. Most likely in the north and west, particularly as the night continues. Feeling cold with widespread frosts and icy patches. Minimum temperature -5 °C.
Saturday:
Scattered wintry showers with sunny intervals continue to affect Wales with the clearest and driest spells over South Wales. Becoming largely clear and dry overnight. Feeling cold with light winds. Maximum temperature 4 °C.
Outlook for Sunday to Tuesday:
Occasional rain and snow, mainly over the hills in south clearing during the afternoon on Sunday. Sunny spells with scattered showers on Monday. Heavy rain on Tuesday. Feeling cold throughout.
Updated:
UK long range weather forecast
Unsettled conditions look likely to dominate for this period, with low pressure across the UK. This should bringing changeable weather to most of the country, with periods of rain, showers, and strong winds at times. While westerly and southwesterly winds are expected to be dominant for most of the period, occasional northerly winds are possible, brining a chance of snowfall, likely confined to the far north. Milder conditions in generally may start to spread across most of the UK at points during most of this period. Towards the end of the period, we may see high pressure bringing a higher than average chance of cold weather with wintry outbreaks. However, there is a chance of drier than average conditions, which would bring increased frost and fog risks.
Updated:
Confidence is low for this period, but current signals indicate a possible high pressure system around or near the UK during this period. This would likely bring cold northerly winds, producing colder than average temperatures and wintry outbreaks. The second half of February is likely to have a mixture of weather types, with periods of wet, windy and milder weather interspersed with drier, calmer, colder periods.
Updated:
