Treharris
Merthyr Tydfil County Borough, Wales, United Kingdom
Current Weather
10°50°
Breezy and Overcast
Feels Like: 3°38°
Min: 7°44°
Max: 15°59°
The next few hours will be overcast, with tomorrow reaching 10°C and dropping to 8°C. The coming days will be drizzle
Hourly Forecast
Want a closer look at the weather?
Premium adds minute-by-minute rain timing, yesterday comparisons, and more detail across Airpult.
Air Quality
Air quality is satisfactory, and air pollution poses little or no risk.
Pollen Levels
Daylight Hours
08:03
Sunrise
17:50
Sunset
Moon
16:58
Moonrise
05:39
Moonset
Daily Forecast
Today
Sunday
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Resources
UV Index
Humidity
Looking at the night sky?
See moon phases, eclipses, and seasons for this year.
View astronomyCurrent stargazing conditions?
See sky darkness, moon phase, and the best viewing window for Treharris.
View stargazing scoreWeather in Treharris tomorrow, October 25, 2026
Treharris starts October 25, 2026 under largely sunny skies, with bright spells setting the tone from the outset. Outdoor plans should enjoy long stretches of open sky as the day unfolds. Expect a brighter morning, with limited cloud around 51% by 11:00. Conditions start on a settled note.Treharris starts October 25, 2026 under largely sunny skies, with bright spells setting the tone from the outset. Outdoor plans should enjoy long stretches of open sky as the day unfolds. Expect a brighter morning, with limited cloud around 51% by 11:00. Conditions start on a settled note.
Expect highs of 10°C and cooler readings close to 8°C. Expect humidity between 66% and 75%, most humid near 07:00. Expect a blustery spell, with winds strongest near 11:00 at 36 km/h.Expect highs of 51°F and cooler readings close to 46°F. Expect humidity between 66% and 75%, most humid near 07:00. Expect a blustery spell, with winds strongest near 11:00 at 22 mph.
Later hours favour clearer intervals, as cloud stays near 42% around 18:00. The afternoon is the better half for outdoor time. Visibility holds near 38 km, though it can fall to 35.8 km. The sun rises at 07:05 and sets at 16:48, for a total of 9 hours 42 minutes of sunlight today.Later hours favour clearer intervals, as cloud stays near 42% around 18:00. The afternoon is the better half for outdoor time. Visibility holds near 23.6 mi, though it can fall to 22.2 mi. The sun rises at 07:05 and sets at 16:48, for a total of 9 hours 42 minutes of sunlight today.
Overall, Treharris on October 25, 2026 feels driven by the wind, with speeds near 36 km/h and a high around 10°C.Overall, Treharris on October 25, 2026 feels driven by the wind, with speeds near 22 mph and a high around 51°F.
Frequently asked questions about weather in Treharris
How warm does it get in Treharris?
The warmest month in Treharris is July, with average high temperatures of 20°C. The average temperature during this period is around 16°C.The warmest month in Treharris is July, with average high temperatures of 68°F. The average temperature during this period is around 61°F.
How cold does it get in Treharris?
The coldest month in Treharris is January, with average low temperatures of 2°C. The average temperature during this period is around 4°C.The coldest month in Treharris is January, with average low temperatures of 35°F. The average temperature during this period is around 40°F.
What is the wettest time of year in Treharris?
The wettest month in Treharris is October, with an average of 129 mm of precipitation.The wettest month in Treharris is October, with an average of 5.1 in of precipitation.
What is the driest time of year in Treharris?
The driest month in Treharris is April, with an average of 73 mm of precipitation.The driest month in Treharris is April, with an average of 2.9 in of precipitation.