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Snowdonia National Park Forecast

Snowdonia National Park

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

Click here to download the latest PDF Last Updated Sun 17th Jan 21 at 2:38PM Last Updated Sunday 17th January 2021 at 2:38PM
View our low-graphics version Last Updated Sun 17th Jan 21 at 2:38PM Last Updated Sunday 17th January 2021 at 2:38PM

Viewing Forecast For

Snowdonia National Park
Monday 18th January 2021
Last updated Sunday 17th January 2021 at 2:38 PM

Summary for all mountain areas

Scotland: Westerly winds will drive showers across the country; snow above 500m. Cloud covering the hills extensively. England and Wales: Occasional showers; snow higher tops. Hill fog extensive on higher areas. Rain becoming more frequent toward dusk.

Headline for Snowdonia National Park

Mostly dry morning, then rain/snow tops arriving in afternoon.

How windy? (On the summits)

Southwesterly 25mph.

Effect of the wind on you?

Fairly small.

How Wet?

Isolated showers, then rain/snow tops PM.

Frequently dry in morning, although risk of one or two showers, snow above 700m. Then increasingly through afternoon rain, or for a time above 800m snow, will spread northeastwards across the area.

Cloud on the hills?

Extensive on higher areas

Higher areas extensively covered; typical cloud base 600 to 850m, generally lowest western mountains.

Chance of cloud free summits?

30%

Sunshine and air clarity?

Occasional sunshine in morning; mainly east Wales. Very good visibility.

How Cold? (at 900m)

-1C lifting to 2C in late afternoon.

Freezing Level

800m, lifting above summits by late afternoon.

Viewing Forecast For

Snowdonia National Park
Tuesday 19th January 2021
Last updated Sunday 17th January 2021 at 2:38 PM

How windy? (On the summits)

Perhaps a lull at first, but much of the day southwesterly 35 to 50mph.

Effect of the wind on you?

Be prepared for arduous or difficult conditions for much of the day day with significant wind chill and buffeting.

How Wet?

Persistent rain

Rain will rarely abate through the day with heavy falls across western hills. Becoming very wet underfoot with some flooding by end of the day.

Cloud on the hills?

Extensive

Extensive cloud will shroud the hills throughout the day; down to lowest slopes across western hills.

Chance of cloud free summits?

20%

Sunshine and air clarity?

Overcast. Visibility poor or very poor.

How Cold? (at 900m)

5C

Freezing Level

Above the summits.

Viewing Forecast For

Snowdonia National Park
Wednesday 20th January 2021
Last updated Sunday 17th January 2021 at 2:38 PM

How windy? (On the summits)

Southwesterly 20 to 30mph from dawn, will ease to 15mph or less by midday. May become northwest 25 to 35mph after dusk.

Effect of the wind on you?

Will impede walking for a few hours from dawn, but becoming mostly small into afternoon.

How Wet?

Very wet, snow later higher slopes.

Incessant rain leading to very wet conditions underfoot with streams and rivers in spate with some areas in flood. Reverting widely to snow in afternoon.

Cloud on the hills?

Extensive

Cloud will cover the hills widely in fog throughout the day.

Chance of cloud free summits?

20%

Sunshine and air clarity?

Overcast. Visibility poor or very poor.

How Cold? (at 900m)

2C, but likely to abruptly fall to -3C later in the day; most likely in the afternoon.

Freezing Level

Above the summits from dawn, but will lower abruptly to 500m during the afternoon.

Planning Outlook

Precipitation will fall at some stage most days over the next week or two; mostly falling as snow on the mountains - although rain England and Wales early next week. On the Scottish Highlands, terrain will be persistently frozen. Often windy with extensive upland gales.