Snowdonia National Park Forecast

Viewing Weather Forecast for Tuesday 19th November 2019

Includes all summits in the the northern half of Wales from Plynlimon northwards.

Forecast last updated on Tuesday 19th November 2019 at 3:14pm

Summary for all mountain areas

Most of Britain cold, with most terrain frozen. Winds fairly light wind and hazy sunshine. However, blustery western mountains, particularly near Irish Sea, and risk of a little light rain coastal hills, most likely Wales. Less cold in Wales, where low cloud, mostly east and south Wales.

Headline for Snowdonia National Park

Terrain partly frozen. Chance of a little light rain; and low cloud.

How windy? (On the summits)

Southerly 25 to 30mph, but 35mph or by dusk locally 45mph west Wales.

Effect of wind on you?

Will increasingly make for arduous walking across higher areas, particularly west Wales with significant wind chill.

How Wet? (Precipitation and its impact)

Precipitation very unlikely

Low risk of a few spots of light rain west Wales.

Cloud on the hills?

Risk fog mid and east Wales

Uncertainty as to the extent of cloud forming east and mid Wales above about 600m; there may be very little. In west Wales (including Snowdon range), only fragments of cloud on some higher tops.

Chance of cloud free summits?


Air clarity (below cloud)

Occasional weak sun through high level cloud. Mostly very good visibility.

How Cold? (at 900m)

1C. Will later feel as cold as minus 12 Celsius directly in the wind

Freezing Level

Above the summits; some terrain partly frozen morning after slight frost.

Planning Outlook

All mountain areas of Britain from Wednesday 20th November 2019

A slow change to less cold and increasingly wet weather as low pressure slowly envelops Britain from the south. However, 'winter conditions' will survive across the Scottish Highlands until into, or on higher summits, perhaps through the weekend. Next week, cycles of freeze and thaw likely Scottish Highlands, whilst elsewhere, only occasionally higher tops below freezing point.