Snowdonia National Park Forecast

Viewing Weather Forecast for Saturday 14th December 2019

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

Today | Sunday | Monday

Forecast last updated on Friday 13th December 2019 at 3:50pm

Summary for all mountain areas

A complex area of low pressure to the north and west of Scotland brings a risk of snow setting in for periods for the W/NW Highlands. Smaller amounts of snow toward east. Frequent snow also for western hills of England & Wales. Widespread upland gales and severe wind chill, expect perhaps N Scotland.

Headline for Snowdonia National Park

Upland gales or severe gales. Risk periods of snow; whiteout.

How windy? (On the summits)

West to southwesterly, in range 40 to 60mph throughout the day.

Effect of wind on you?

Difficult conditions and severe wind chill on higher terrain through the day.

How Wet? (Precipitation and its impact)

Upland snow on and off

Areas of snow spreading from the west, often small amounts, but affecting western hills over many hours giving whiteout. Very little in east. Rain lower slopes. Setting in heavier after dark.

Cloud on the hills?

Fairly extensive across hills

Banks of cloud across higher slopes, at times forming to lower levels, mostly around snow.

Chance of cloud free summits?


Air clarity (below cloud)

Limited if any sun. Visibility appalling in snow and low cloud, but in places at times very good.

How Cold? (at 900m)

-3C. In strongest wind on highest tops, wind chill feeling close to -20C.

Freezing Level


Planning Outlook

All mountain areas of Britain from Sunday 15th December 2019

Staying cold through into early next week. Most mountain terrain frozen, to lower slopes in Scotland. Some substantial snowfalls, with snow lying from many lower slopes up away from immediate coasts. Most precipitation focused on western mountains. Winds very varied, sometimes gale force, but also some lulls. Quieter conditions briefly early next week. A gradual but complex rise of freezing level from the south through midweek, although Scottish mountains may well stay substantially frozen. Rain preceded by snow extending in from the southwest.