Llangadfan Weather Forecast, Powys SY21 0

Today 20 Dec Wales

A largely fine day with sunny periods. Freshening southeasterly winds developing and turning windier in the west with some rain possible in Pembrokeshire later. Feeling cooler. Maximum Temperature 9C.

Tonight 20 Dec Wales

Outbreaks of heavy rain and blustery winds will spread north-eastwards through the evening. Turning drier overnight, though low cloud and drizzle lingering in the east. Winds tending to ease. Turning chilly where skies remain clear, with some fog patches forming. Minimum Temperature 3C.

Sun 21 Dec Wales

Cloudy in the north and east, with hill fog and some rain and drizzle possible at times. Drier and sunnier in the west, though tending to cloud over here later. Maximum Temperature 9C.

Mon 22 Dec Wales

Often cloudy and dull through this period with some rain and drizzle possible at first. Gradually turning colder and possibly brighter with an easterly breeze developing.

Tue 23 Dec Wales

Often cloudy and dull through this period with some rain and drizzle possible at first. Gradually turning colder and possibly brighter with an easterly breeze developing.

Wed 24 Dec Wales

Often cloudy and dull through this period with some rain and drizzle possible at first. Gradually turning colder and possibly brighter with an easterly breeze developing.

Thu 25 Dec Wales

Continued mostly settled conditions expected, as high pressure builds to the north of the UK. This will bring a strengthening easterly then northeasterly wind over the period, with wind-chill making it feel colder. Whilst there will be a fair amount of dry weather, a few showers will still be possible, particularly across eastern and southern parts which may be wintry in places, more especially over high ground. High pressure will likely dominate the weather in the run up to the New Year, slowly drifting to the west. This will maintain largely settled conditions, although with an increasing chance of showery conditions later in the period. Temperatures will be below average much of the time, with frost likely where clear skies and light winds prevail.

Fri 26 Dec Wales

Continued mostly settled conditions expected, as high pressure builds to the north of the UK. This will bring a strengthening easterly then northeasterly wind over the period, with wind-chill making it feel colder. Whilst there will be a fair amount of dry weather, a few showers will still be possible, particularly across eastern and southern parts which may be wintry in places, more especially over high ground. High pressure will likely dominate the weather in the run up to the New Year, slowly drifting to the west. This will maintain largely settled conditions, although with an increasing chance of showery conditions later in the period. Temperatures will be below average much of the time, with frost likely where clear skies and light winds prevail.

Llangadfan Weather Forecast

Today 20 Dec Wales

Tonight 20 Dec Wales

Sun 21 Dec Wales

Mon 22 Dec Wales

Tue 23 Dec Wales

Wed 24 Dec Wales

Thu 25 Dec Wales

Fri 26 Dec Wales

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Llangadfan Temperature Statistics

December Temperature

Lake Vyrnwy Saws (8km)

Lowest 9 January, 2025

Average 2025

Highest 11 July, 2025

Lowest 20 November, 2025

Average November

Highest 5 November, 2025

Lowest 16 December, 2025

Average December

Highest 9 December, 2025

Climate (2020–Present)

Lake Vyrnwy Saws (8km)

Average Low 2020–2025

Average 2020–2025

Average High 2020–2025