Snowdonia National Park Forecast

Also includes higher summits south to Plynlimon.

Viewing Weather Forecast for Friday 15th December 2017
Forecast last updated on Friday 15th December 2017 at 7:12am

Today | Saturday | Sunday

Summary for all mountain areas

Mountain terrain frozen. The remnants of a front will bring a little snow and low cloud southwards across England and Wales. Elsewhere, substantially fine with cloud lifting off most summits, although in N & NE Scotland snow and low cloud widespread.

Headline for Snowdonia National Park

Higher terrain frozen. Windy. Snow showers, mainly Snowdon range.

How windy? (On the summits)

Northerly, 30 to 40mph.

Effect of wind on you?

Walking arduous on higher areas. Significant wind chill.

How Wet?

Snow concentrated Snowdon range

Snowdon range: Snow showers will develop, perhaps frequent for an hour or two, mainly Carneddau. Rain lower, coastal slopes. Elsewhere, occasional snow showers; may only amount to flurries.

Cloud on the hills?

Extensive all day Snowdon range; mostly clearing elsewhere

Snowdon range: Extensive cloud above 650m, occasionally 400m although a few breaks to above 750m. Elsewhere: Fog frequent above 600 to 800m morning will then lift and break to clear most summits in the afternoon.

Chance of cloud free summits?

20% Snowdon range to in afternoon 80% elsewhere

Sunshine and air clarity?

Occasional sunshine, although rare Snowdon range. The air very clear, but visibility appalling in cloud and snow.

How Cold? (at 900m)


Freezing Level

550 to 700m; highest coastal hills. Terrain partly frozen some valleys after a frost.

Planning Outlook

All mountain areas of Britain from Saturday 16th December 2017

Snow melt will be substantial from Sunday, although from Wednesday there will be a series of freeze thaw cycles on the Scottish Highlands. Rain (occasionally snow higher summits) intermittently W & NW Scotland, but elsewhere total rainfall small. Most forecasts indicate frequent stormy, often wet conditions from Christmas as a series of deep Atlantic lows come in. Intermittently snow will fall, particularly Scottish Highlands. However, a small minority of indicators suggest much colder, drier conditions eventually returning.

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