Snowdonia National Park Forecast

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

Viewing Weather Forecast for Monday 20th January 2020
Forecast last updated on Sunday 19th January 2020 at 4:42pm

Today | Tuesday | Wednesday

Summary for all mountain areas

High pressure will bring another settled day across England and Wales with fairly sunny skies. However, some banks of valleys fog and across the Lakes banks of low cloud. Across Scotland, extensive low cloud in the west, but some tops poking above cloud. Windy, upland gales in the north.

Headline for Snowdonia National Park

Frosty start, then fine with light winds and clear hills above patchy valley fog.

How windy? (On the summits)

Northwesterly 10-15mph.

Effect of wind on you?


How Wet? (Precipitation and its impact)

No precipitation

Cloud on the hills?

Very little

Patches of fog in some valleys, may persist all day. Otherwise, hills clear.

Chance of cloud free summits?


Air clarity (below cloud)

Extensive sunshine. Visibility excellent or superb, but locally suppressed in valley fog.

How Cold? (at 900m)

3 or 4C

Freezing Level

Above the summits, but widespread frost in the valleys morning.

Planning Outlook

All mountain areas of Britain from Tuesday 21st January 2020

High pressure will dominate through much of the week, bringing a much drier week, especially across England and Wales. A weakening front will move south on Tuesday bringing some drizzle, most extensive W Scotland, and more especially low cloud to many hills. Although some tops will poke above the cloud. Areas of low cloud from Wednesday onwards with further drizzle in the northwest. Again inversion conditions present with some tops above the cloud. Freezing level often above the tops with considerable snow loss overall. Although a temporary lowering of freezing level on Tuesday N Scotland. Blustery through week across the Highlands, occasional gales in north.

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