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 Thu 21st Jan 21 at 2:57PM Last Updated Thursday 21st January 2021 at 2:57PM
View our low-graphics version Last Updated Thu 21st Jan 21 at 2:57PM Last Updated Thursday 21st January 2021 at 2:57PM

Viewing Forecast For

Snowdonia National Park
Friday 22nd January 2021
Last updated Thursday 21st January 2021 at 2:57 PM

Summary for all mountain areas

Very cold across the mountains - terrain widely frozen, very icy in places, plus lying snow in most areas. Brisk west to northwest winds will maintain a severe chill factor in exposure. Areas of snow or hail showers moving inland from western coasts.

Headline for Snowdonia National Park

Cold, brisk wind. Snow or hail showers.

How windy? (On the summits)

Westerly 20 to 25mph, but up to 35mph in showers, also generally stronger at dawn.

Effect of the wind on you?

Buffeting at times, risk sudden squalls. Severe wind chill.

How Wet?

Snow and hail showers

Occasional snow or hail showers coming inland from western coasts, briefly heavy, chance isolated thunder. May be locally frequent over an hour or so. Some places toward east & mid-Wales escaping more often dry all day.

Cloud on the hills?

Mostly high tops

Often extensive above 800m Snowdon range, and shafts of cloud sometimes below 500m. Breaks to higher tops best toward mid-Wales.

Chance of cloud free summits?

40%

Sunshine and air clarity?

Brief glimpses of sun and often very clear air. Visibility abruptly very poor in showers.

How Cold? (at 900m)

-4C. Where exposed to wind on higher terrain, feeling as cold as -15C.

Freezing Level

400-500m, but also frost in some valleys in the morning. Very icy underfoot.

Viewing Forecast For

Snowdonia National Park
Saturday 23rd January 2021
Last updated Thursday 21st January 2021 at 2:57 PM

How windy? (On the summits)

Northwesterly 20 to 30mph.

Effect of the wind on you?

Frequent buffeting on higher terrain. Severe wind chill.

How Wet?

Snow or hail showers

Snow and hail showers continue to come in from the west, sometimes frequent and heavy. Small risk isolated thunder. Fewer showers toward east & mid Wales.

Cloud on the hills?

Often covering higher tops

Cloud base varied, but often capping higher mountains above 800-900m. Sometimes forming below 700m, mainly around showers in the west.

Chance of cloud free summits?

30%

Sunshine and air clarity?

Brief sun and very clear air. Visibility very poor in showers.

How Cold? (at 900m)

-5C

Freezing Level

Most terrain frozen from dawn. Partial thawing lower slopes up to 300m.

Viewing Forecast For

Snowdonia National Park
Sunday 24th January 2021
Last updated Thursday 21st January 2021 at 2:57 PM

How windy? (On the summits)

Direction may vary, mostly westerly, occasional lulls, but risk strengthening to 30-40mph for several hours.

Effect of the wind on you?

Sometimes small, but beware of deteriorating conditions and significant wind chill.

How Wet?

Risk periods of snow and hail

Detail uncertain: Areas of snow or hail showers coming in from the west. May merge into a zone of constant snow for a few hours. Also periods where dry for several hours locally. Isolated thunder.

Cloud on the hills?

Extensive around precipitation

Cloud varied - sometimes only fragments on higher slopes, with good breaks. Around precipitation, forming extensively and quickly below 700m.

Chance of cloud free summits?

40%

Sunshine and air clarity?

Intermittent sun and very clear air. Visibility abruptly appalling if in snow.

How Cold? (at 900m)

-5C

Freezing Level

Terrain widely frozen. May rise above zero up to 300-400m for a time.

Planning Outlook

All mountains sub-zero through the weekend and into early next week. Terrain widely frozen with fresh snow cover to many lower slopes. Some freeze-thaw cycles may then occur, although higher Scottish mountains may rarely lift above zero for the next couple of weeks at least. Showers of snow and hail, or further significant snowfalls in some areas. Precipitation frequent into late January. Hard frosts most common in Highland glens. Very icy underfoot in places. Wind speeds varied, occasionally reaching gale force.