Clwydian Range and Berwyns mountain weather forecast.

Fri 20 Nov on the hillsA fine day in the Clwydian Range and the Berwyns: dry, with light winds. See wind, cloud base and timings

Mountain Weather brief

Clwydian Range and Berwyns

Friday 20 November 2026 · The Berwyns and northeast Wales

Confidence: Unavailable Why?

Uncertainty over sky cloud cover and sunshine.

What matters most

A fine day in the Clwydian Range and the Berwyns: dry, with light winds.

High-ground wind · 600 m5-15 mph westerly Gusts · 600 m10-20 mph Feels like · 600 m-6 to -2°C
Regional median

Sunshine and sky

Less sunshine later. Sunshine is indicated less often later in the day.

Modelled sunshine8 h89% of daylight
Early2 h sunshine
Midday4 h sunshine
Later0 h sunshine

These are direct modelled sunshine hours during daylight, not the probability of sunshine. Cloud cover and summit cloud are assessed separately in the forecast above. The regional median prevents one unusually bright or dull summit cell defining the whole area.

Overnight forecast: 17:00–08:00 (UK local time), in Wild camping below.

Morning · 08:00–12:00ExcellentSummit winds around 5-15 mph. Gusts around 10-20 mph are possible on exposed ground. Some early summit cloud is possible.
96
Afternoon · 12:00–17:00ExcellentSummit winds around 10-20 mph. Gusts around 15-25 mph are possible on exposed ground.
96

Conservative regional grades across representative summits, so one sheltered hill does not overstate the wider area.

01

High-ground wind (600 m)

At around 600 m, expect a westerly wind of 5–15 mph, gusting 10–20 mph.

02

Walking impact

Little effect on walking, although exposed tops may still feel chilly.

03

Rain and showers

It should stay dry.

04

Cloud-free summits

Clear-summit estimate: about 60% early, about 65% around midday and about 65% later.

05

Cloud and visibility

The tops should stay mostly clear of cloud. Good spells of sunshine are likely. The air should be clear, so expect far-reaching views whenever the tops come out of the cloud.

06

Temperature and wind chill

At around 600 m it will be 0 to 4°C, feeling like -6 to -2°C in the wind. Take a hat, gloves, a windproof and a spare warm layer.

07

Freezing level

The freezing level is close to summit height.

08

Daylight

Sunrise 07:45, Sunset 16:13, about 8.5 hours daylight.

Overnight · 17:00–08:00Wild campingBetaAcross these hills, a mixed night to camp, mainly because of the wind: gusts of about 30 mph. 59Mixed · 600 m View detailsHide details
Regional night beginning Friday 20 November 2026

Full regional overnight outlook

Across these hills, a mixed night to camp, mainly because of the wind. Gusts reach about 30 mph on open ground, so peg out well and use the guylines. Look for shelter from the southwest. It should stay dry. A cold night, down to about 2°C around 300 m.

Overnight rain0.0 mmOpen ground · 600 m13 mph · gusts 31 mphMorning pack-upNo wet signal

Moon overnight

Waxing gibbous moon

Illuminated disc
83%
Moonrise
Outside this window
Moonset
03:36 next morning GMT

Cloud and terrain vary across the area. Illumination describes the sunlit part of the Moon, not brightness at your pitch.

Overnight window: 20 Nov, 17:00 GMT to 21 Nov, 08:00 GMT. Approximate open-horizon times; hills can hide the Moon. Still take a headtorch.

Representative location: 52.917, -3.746. Times vary across the area.

300 m59 · mixed
Wind / gust
11 mph / 26 mph
Coldest
2.1°C
In cloud
0% of modelled night
Condensation
Low
600 m59 · mixed
Wind / gust
13 mph / 31 mph
Coldest
2.6°C
In cloud
0% of modelled night
Condensation
Low

Open-hillside guidance across representative hills. Local shelter, ridges, tent design and the exact pitch can change conditions substantially. Read about sleeping-bag comfort ratings, pitching in strong winds or using the wild-camping forecast.

Daytime · exposed rockClimbing & scramblingBetaSnow is likely to be lying on some high ground. Scrambling may require winter mountaineering skills and equipment. 32Poor · Poor View detailsHide details
Regional rock conditions · sampled mountain terrain

Regional climbing & scrambling outlook

A broad guide to dampness and exposed rock across the area, not a forecast for every crag. Lower, sheltered crags and individual rock types may behave differently.

Conditions for exposed scrambling across the area look poor (32/100). Rock is likely to be mostly dry, though local seepage and shaded holds remain unresolved. Mapped summit-point geology across the representative hills includes slate or mudstone and volcanic rock. Rock can therefore respond differently to moisture between crags and routes.

Rock surfaceProbably dryExposed gust20 mphRain0.0 mm
Mapped rock across sampled summits2 broad familiesSummit samples, not a survey of every crag
slate or mudstone 62% 5 representative summitsOften positive when dry, but smooth, polished or slabby sections can become markedly more slippery when damp.volcanic rock 38% 3 representative summitsOften grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery.

Representative summit-point samples across the region; individual crags and routes may differ.

Generic exposed hands-on-rock terrain across representative summits; mapped summit-point geology is a broad regional sample, not a named-route survey. Contains British Geological Survey materials © UKRI 2026. How to use the climbing and scrambling forecast.

Recommended kit for this dayWeather-aware packing prompts, plus your core hillwalking kitView kit

For a day hillwalk, not a complete route-specific checklist. Carry navigation and backup you can use, warm and waterproof layers, suitable footwear, food and water, a headtorch, emergency shelter, first aid and a way to call for help. Snow, ice, technical terrain and overnight trips need additional equipment and skills.

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Weather data: Open-Meteo (CC BY 4.0). Adapted by Mountain Weather.

Updated 14 November 2026 at 16:37 UTC. See typical weekly and monthly conditions for Clwydian Range and Berwyns.

More context for your hill day

Check the approach as well as the tops

Compare midge conditions by day and height, or look for a possible cloud inversion. For Snowdon and Tryfan, camera-derived cloud-base observations add a view of conditions already seen on the slopes.