Snowdonia National Park Weather Forecast, Gwynedd

Today 12 Dec Wales

Rain in the east gradually clearing during the morning to leave a dry and sunny day for many, though the odd shower may drift into western coasts. Winds lighter than of late but feeling fresher. Maximum Temperature 11C.

Tonight 12 Dec Wales

Isolated showers still possible along western coasts, moving inland for a time this evening. Otherwise, dry overnight with lengthy clear periods and gentle winds. A chilly night with pockets of frost and fog developing. Minimum Temperature -1C.

Sat 13 Dec Wales

Bright to begin the weekend, though sunshine turning hazier through the day as cloud builds. Winds strengthening with coastal gales developing around Anglesey by evening. Dry during daylight hours. Maximum Temperature 11C.

Sun 14 Dec Wales

Wet in the northwest on Sunday with gales around coasts and hills; southern counties remaining dry until later. Staying unsettled into next week with further rain and brisk winds expected.

Mon 15 Dec Wales

Wet in the northwest on Sunday with gales around coasts and hills; southern counties remaining dry until later. Staying unsettled into next week with further rain and brisk winds expected.

Tue 16 Dec Wales

Wet in the northwest on Sunday with gales around coasts and hills; southern counties remaining dry until later. Staying unsettled into next week with further rain and brisk winds expected.

Wed 17 Dec Wales

Unsettled 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. Temperatures are likely to be above normal overall. Later in the period, conditions may start to become a little more settled, with rainfall amounts decreasing and drier weather becoming more prevalent. This may mean an increasing amount of overnight fog and frost.

Thu 18 Dec Wales

Unsettled 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. Temperatures are likely to be above normal overall. Later in the period, conditions may start to become a little more settled, with rainfall amounts decreasing and drier weather becoming more prevalent. This may mean an increasing amount of overnight fog and frost.

Snowdonia National Park Weather Forecast

Today 12 Dec Wales

Tonight 12 Dec Wales

Sat 13 Dec Wales

Sun 14 Dec Wales

Mon 15 Dec Wales

Tue 16 Dec Wales

Wed 17 Dec Wales

Thu 18 Dec Wales

Temperature Forecast Met Office

Temperature Real-Time

Crug-y-Gorllwyn (Carmarthenshire) Radar

National Satellite

National Synoptic

Snowdonia National Park Temperature Statistics

December Temperature

Capel Curig Saws (26km)

Lowest 9 January, 2025

Average 2025

Highest 12 July, 2025

Lowest 25 November, 2025

Average November

Highest 5 November, 2025

Lowest 4 December, 2025

Average December

Highest 9 December, 2025

Climate (2020–Present)

Capel Curig Saws (26km)

Average Low 2020–2025

Average 2020–2025

Average High 2020–2025