Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Today's Forecast
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Fine, partly cloudy, snow cover on tops
Mostly dry with partly cloudy skies; patchy cloud occasionally covering some mountain slopes; tops remain capped with snow.
Chilly
Air temperature near or just above freezing on higher summits. Feeling distinctly chilly on tops when stationary or where exposed to wind. Take appropriate layers.
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Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Fine, partly cloudy, snow cover on tops
Mostly dry with partly cloudy skies; patchy cloud occasionally covering some mountain slopes; tops remain capped with snow.
Chilly
Air temperature near or just above freezing on higher summits. Feeling distinctly chilly on tops when stationary or where exposed to wind. Take appropriate layers.
Viewing Forecast For
Eryri / Snowdonia National Park
Monday 9th December 2024
Last updated
Sun 8th Dec 24 at
3:15PM
Summary for all mountain areas
Calm and sunny conditions for the Highlands, some fog in the glens, plus frost. Chilly northeasterly winds for England & Wales, bringing cloud banks onto eastern hills and locally an odd light shower; dry and often sunny western areas.
Headline for Eryri / Snowdonia National Park
Windy, feeling cold. Dry, some patchy cloud banks.
How windy? (On the summits)
Northeasterly 25 to 40mph - generally strongest mid Wales, but gusty around major summits and elevated passes.
Effect of the wind on you?
Walking arduous on higher areas; in places sudden gusts reaching lower slopes. Considerable wind chill.
How Wet?
Precipitation not expected
Chance of brief spots in the wind northernmost areas.
Cloud on the hills?
Occasionally covering higher tops.
Cloud may come and go, by late morning, above 750 to 900m, most frequent and at times a little lower Carneddau.
Chance of cloud free summits?
50% north of A5, to 70% elsewhere.
Sunshine and air clarity?
Bursts of sunshine, and very good visibility. Becoming often cloudier eastern hills.
How Cold? (at 900m)
0C. Will feel like -12C directly in the wind.
Freezing Level
900m.
Viewing Forecast For
Eryri / Snowdonia National Park
Tuesday 10th December 2024
Last updated
Sun 8th Dec 24 at
3:15PM
How windy? (On the summits)
Easterly 25mph, locally 30mph mid Wales.
Effect of the wind on you?
Strenuous walking over exposed higher terrain. Marked wind chill.
How Wet?
No rain
Cloud on the hills?
Patches may shroud higher slopes
Patches may affect slopes above 600m at times, particularly Carneddau and Berwyn Mountains.
Chance of cloud free summits?
60%
Sunshine and air clarity?
Mostly sunny western areas, patchy cloud easternmost areas. Visibility very good.
How Cold? (at 900m)
0C. Wind chill feeling like -8C.
Freezing Level
900m.
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 11th December 2024
Last updated
Sun 8th Dec 24 at
3:15PM
How windy? (On the summits)
Easterly 15-20mph, may drop less.
Effect of the wind on you?
Fairly small, but feeling cold in exposure.
How Wet?
Very likely dry
Cloud on the hills?
Patchy fog some slopes
Fog in some valleys, possible cloud banks drifting over some eastern hills.
Chance of cloud free summits?
80%
Sunshine and air clarity?
Sunshine best toward west, cloudier east. Visibility very good, but misty some areas.
How Cold? (at 900m)
Near 0C, although some western slopes a degree or so warmer.
Freezing Level
Around 900m, but also some frost in sheltered valleys in morning.
Planning Outlook
High pressure centred over Scotland will dominate the weather until later this week. Winds gradually ease over England and Wales, whilst almost calm across much of Scotland. It will be extensively dry. Frost in valleys and glens most night, plus areas of low-level fog. Higher terrain substantially frozen, although air temperature will be several degrees above freezing above an inversion. Toward next weekend, as the high weakens and moves south, rain bearing fronts and stronger winds will increasingly affect at least northern Britain. Temperatures likely to fluctuate with some periods of thaw, but possibly still often sub-zero at least on Scottish mountains during mid-December.