Treharris

Merthyr Tydfil County Borough, Wales, United Kingdom

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Current Weather

14°

Mostly Cloudy

Feels Like: 14°

Min: 12°

Max: 16°

The next few hours will be partly cloudy, with today reaching 16°C and dropping to 12°C. The coming days will be drizzle

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Compare today's weather with yesterday's data and track temperature trends over time.

Hourly Forecast

14° 15° 16° 16° 16° 16° 16° 15° 14° 13° 13° 13° 13° 13° 12° 13° 13° 14° 14° 15° 15° 15° 15° 15°
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100%
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100%
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9pm
10pm
11pm
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Today
Tomorrow

Daylight Hours

06:58

Sunrise

19:16

Sunset

12 hours 18 minutes of sunlight today

Moon

Waxing Crescent

13:32

Moonrise

20:53

Moonset

Daily Forecast

Today

12°
16°

Thursday

12°
16°

Friday

10°
17°

Saturday

16°
17°

Sunday

11°
16°

Monday

14°
19°

Tuesday

13°
18°

Wednesday

12°
20°

Thursday

14°
20°

Friday

15°
19°

Air Quality Data Available

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UV Index

No protection needed
1 Low
Low Extreme

Humidity

77% Humid
Low High

Weather in Treharris today, September 16, 2026

Expect a muted, overcast feel in Treharris on September 16, 2026 as cloud persists. Brighter breaks, if they arrive, should stay brief. The morning sky stays heavily clouded, with cover near 95% around 10:00. Grey conditions set the early tone before any later change.

Temperatures climb from an overnight low near 12°C toward a daytime high of about 16°C. Moisture in the air spans 66%-89%, with the highest values around 23:00. Expect gentle winds, highest near 13:00 at 5.1 km/h.

Through the afternoon cloud remains the main feature, with cover near 100% around 15:00. Bright spells should stay limited even as the day wears on. Horizontal visibility sits around 34.3 km, briefly nearer 23.5 km. Sunrise is at 06:58 and sunset at 19:16, giving 12 hours 18 minutes of sunlight today.

Overall, Treharris on September 16, 2026 stays grey and muted, so outdoor plans may want a flexible backup even with a high near 16°C.

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.

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.

What is the wettest time of year in Treharris?

The wettest month in Treharris is October, with an average of 129mm of precipitation.

What is the driest time of year in Treharris?

The driest month in Treharris is April, with an average of 73mm of precipitation.

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Metric (°C, km/h)