Snowdonia National Park Forecast

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

Viewing Weather Forecast for Wednesday 16th October 2019
Forecast last updated on Tuesday 15th October 2019 at 4:34pm

Tomorrow | Thursday | Friday

How windy? (On the summits)

Southerly 40mph pre-dawn, but soon west to southwesterly 25-30mph morning, then nearer 15-20mph at times afternoon.

Effect of wind on you?

Varied; risk periods of buffeting and notable wind chill; sometimes fairly small.

How Wet? (Precipitation and its impact)

Early rain clearing

A front moving northeastward brings rain overnight, likely soon clearing after dawn. A risk of scattered showers following, but more likely becoming generally dry.

Cloud on the hills?

Breaks forming to higher tops

Cloud likely to cover many hills from dawn, but likely to lift toward higher slopes. Patches may linger on tops, but cloud likely to substantially break up.

Chance of cloud free summits?

20% rising to 70%

Sunshine?
Air clarity (below cloud)

Sunshine soon developing widely. Visibility generally very good.

How Cold? (at 900m)

6C around dawn, soon dropping to 3C. Wind chill feeling close to -5C in exposure to strongest wind.

Freezing Level

Above the summits, but may drop close to zero later in day higher Snowdon range.

Planning Outlook

All mountain areas of Britain from Thursday 17th October 2019

Through the weekend, areas of rain or showers will rotate around a slow-moving centre of low pressure, some heavy bursts with hail and thunder, but also areas which escape dry most or all of a day. Wind speeds varied, local gales at times, but also marked lulls. Temperatures on the cool side, persistently near or below freezing point on higher Scottish Munros with snow likely to fall and lie above about 1100m. Fairly benign autumn conditions are expected early next week as pressure builds. Milder southwesterlies may then return with some wind and rain possible by midweek.

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