Craig Berthlwyd Weather Forecast, Merthyr Tydfil CF46 5

Today 15 Jul Wales

A bright start in the east, but rain further west will quickly spread across Wales. The rain will turn heavy and persistent, before becoming showery throughout the afternoon. A windy day, especially near the coast and over hills. Maximum Temperature 20C.

Tonight 15 Jul Wales

Showers continue to fade away this evening, allowing clearer skies to develop for many overnight. Winds gradually ease, allowing some patchy fog and low cloud to form in rural spots by dawn. Feeling fresher than recent nights. Minimum Temperature 14C.

Wed 16 Jul Wales

Mainly dry and bright with plenty of warm sunshine in the afternoon. Cloud spills across the southwest later bringing a few spots of rain. Feeling warmer, especially in the sunshine. Maximum Temperature 23C.

Thu 17 Jul Wales

Warmer on Thursday and Friday with a mix of sunshine and a scattering of showers. Rain chances increase on Saturday, with some heavy and thundery rain possibly developing.

Fri 18 Jul Wales

Warmer on Thursday and Friday with a mix of sunshine and a scattering of showers. Rain chances increase on Saturday, with some heavy and thundery rain possibly developing.

Sat 19 Jul Wales

Warmer on Thursday and Friday with a mix of sunshine and a scattering of showers. Rain chances increase on Saturday, with some heavy and thundery rain possibly developing.

Sun 20 Jul Wales

Overall a rather more changeable pattern of weather through this period, compared to much of the summer thus far. The first couple of days could well be particularly unsettled with heavy rain and/or thunderstorms in many areas. Into the following week, a general westerly type set-up looks to become established, with occasional weather systems moving in from the Atlantic. This means further rain or showers and breezy conditions at times, interspersed with some drier, sunnier periods. Temperatures are expected to average out above normal and whilst brief hotter and humid days are possible, the chance of prolonged heat is lower than during the last few weeks. This broad pattern is likely to continue towards the end of July.

Mon 21 Jul Wales

Overall a rather more changeable pattern of weather through this period, compared to much of the summer thus far. The first couple of days could well be particularly unsettled with heavy rain and/or thunderstorms in many areas. Into the following week, a general westerly type set-up looks to become established, with occasional weather systems moving in from the Atlantic. This means further rain or showers and breezy conditions at times, interspersed with some drier, sunnier periods. Temperatures are expected to average out above normal and whilst brief hotter and humid days are possible, the chance of prolonged heat is lower than during the last few weeks. This broad pattern is likely to continue towards the end of July.

Craig Berthlwyd Weather Forecast

Today 15 Jul Wales

Tonight 15 Jul Wales

Wed 16 Jul Wales

Thu 17 Jul Wales

Fri 18 Jul Wales

Sat 19 Jul Wales

Sun 20 Jul Wales

Mon 21 Jul Wales

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Craig Berthlwyd Temperature Statistics

July Temperature

St-athan (29km)

Lowest 9 January, 2025

Average 2025

Highest 11 July, 2025

Lowest 8 June, 2025

Average June

Highest 20 June, 2025

Lowest 3 July, 2025

Average July

Highest 11 July, 2025

Climate (2020–Present)

St-athan (29km)

Average Low 2020–2025

Average 2020–2025

Average High 2020–2025