Gellideg Weather Forecast, Merthyr Tydfil CF48 1

Today 13 Dec Wales

Bright to begin the weekend, though sunshine turning increasingly hazy through the day as cloud thickens from the north. Winds strengthening with coastal gales developing around Anglesey by this evening. Maximum Temperature 11C.

Tonight 13 Dec Wales

Mainly dry this evening but becoming increasingly cloudy and windy overnight with rain moving across Anglesey during the early hours. Could be heavy at times on high ground but milder than Friday night and staying frost free. Minimum Temperature 4C.

Sun 14 Dec Wales

A cloudier and breezier day compared to Saturday with rain moving into the west and north. Some glimmers of sunshine possible in the east. Slightly milder than Saturday. Maximum Temperature 12C.

Mon 15 Dec Wales

Heavy rain moving in on Monday with strong winds. Drier on Tuesday with winds easing. A chilly start to Wednesday, but becoming wet and windy again later.

Tue 16 Dec Wales

Heavy rain moving in on Monday with strong winds. Drier on Tuesday with winds easing. A chilly start to Wednesday, but becoming wet and windy again later.

Wed 17 Dec Wales

Heavy rain moving in on Monday with strong winds. Drier on Tuesday with winds easing. A chilly start to Wednesday, but becoming wet and windy again later.

Thu 18 Dec Wales

Unsettled and generally mild at first with showers or longer spells of rain affecting the UK at times. Some heavy rain is possible anywhere, but it is likely to be heaviest and most persistent in the west and northwest, with sheltered parts of the east and southeast typically drier. Any snow will probably be confined to high ground in the north. Strong winds are possible at times with a risk of gales, especially along coasts and over higher ground. During the period, conditions are likely to become more settled, with rainfall amounts decreasing and drier weather becoming more prevalent. This may mean an increasing amount of overnight fog and frost, with temperatures overall dropping to around average, but it will be chilly if or where any fog persists.

Fri 19 Dec Wales

Unsettled and generally mild at first with showers or longer spells of rain affecting the UK at times. Some heavy rain is possible anywhere, but it is likely to be heaviest and most persistent in the west and northwest, with sheltered parts of the east and southeast typically drier. Any snow will probably be confined to high ground in the north. Strong winds are possible at times with a risk of gales, especially along coasts and over higher ground. During the period, conditions are likely to become more settled, with rainfall amounts decreasing and drier weather becoming more prevalent. This may mean an increasing amount of overnight fog and frost, with temperatures overall dropping to around average, but it will be chilly if or where any fog persists.

Gellideg Weather Forecast

Today 13 Dec Wales

Tonight 13 Dec Wales

Sun 14 Dec Wales

Mon 15 Dec Wales

Tue 16 Dec Wales

Wed 17 Dec Wales

Thu 18 Dec Wales

Fri 19 Dec Wales

Temperature Forecast Met Office

Temperature Real-Time

Crug-y-Gorllwyn (Carmarthenshire) Radar

National Satellite

National Synoptic

Gellideg Temperature Statistics

December Temperature

Sennybridge (37km)

Lowest 9 January, 2025

Average 2025

Highest 11 July, 2025

Lowest 20 November, 2025

Average November

Highest 5 November, 2025

Lowest 4 December, 2025

Average December

Highest 9 December, 2025

Climate (2020–Present)

Sennybridge (37km)

Average Low 2020–2025

Average 2020–2025

Average High 2020–2025