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Updated: 0647 on Mon 30 Jun 2014
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Snowdonia: forecast radar

Saturday, 20 September 2014: dawn to dusk

Printable view Forecast issued: 0421 on Saturday, 20 September 2014

Overview for Saturday

Mostly dry but cloudy, with hill fog. This clearing most hills during the afternoon with brighter spells developing. However staying persistent across northern slopes with some drizzle.

Hazards Risk Explanation
Blizzards No Risk  
Heavy snow No Risk  
Storm force winds No Risk  
Gales No Risk  
Severe chill effect No Risk  
Persistent and extensive hill fog Medium Extensive above 200m leading to difficult navigation at first. Clearing during the afternoon.
Thunderstorms No Risk  
Heavy persistent rain No Risk  
Strong Sunlight Low Low risk of sunburn during sunny spells.

key to hazards and forecast content

Weather summary and probability of precipitation for Saturday
Dawn to 0900 0900 to 1200 1200 to 1500 1500 to dusk
Sunny intervals
Sunny intervals
10% 20% 20% 0%

Detailed mountain weather forecast: Snowdonia



It will be mostly dry but fairly cloudy day with hill fog. Outbreaks of drizzle are possible during the morning, with the hill fog slow to clear, especially from northern slopes. Brighter spells will develop during the afternoon, however showery outbreaks will see hill fog returning above 500m. Some sunny spells are possible by the evening.


Poor at first, but very poor in hill fog. Increasing to good during the afternoon, and perhaps very good by the evening.

Hill fog

Extensive at 200m during the morning but lifting and breaking later. Returning above 500m during afternoon mainly across northern hills and during showers.

Maximum winds above 500m

North to northeasterly 25 mph.


Valleys Plus 13 rising to 18 Celsius.
900 m Plus 10 Celsius.
Freezing level Above the summits.



It should become dry through the early hours with patches of cloud during the early hours, clearing by dawn to give a sunny morning. A little cloud may fill in during the afternoon. Winds will be light and visibility will be much improved.


Very good or excellent.

Hill fog

Occasional patches above 600m.

Maximum winds above 500m

Northeasterly 25 mph.


Valleys Plus 10 rising to 17 Celsius.
900 m Plus 7 Celsius.
Freezing level Above the summits.



A chilly start to the day but dry throughout with light winds and occasional patches of hill fog towards the higher peaks. It will feel cooler than of late but visibility should remain very good.


Dry first ting but soon turning cloudier from the northwest with outbreaks of light rain possible by the afternoon. Winds will be light and southwesterly.


Any rain soon clearing to the southeast leaving a dry day with variable amounts of cloud. Some bright spells are possible but winds will strengthen from the west.



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Weather warnings for Wales

Weather forecast for Wales

The Enhanced Mountain forecast for Snowdonia has been discontinued. All forecast information for these locations can be found in the standard Mountain forecast above.

North East England West Midlands Grampian South West England Central, Tayside & Fife Northern Ireland North West England East of England Highlands & Eilean Siar Strathclyde Wales East Midlands SW Scotland, Lothian Borders London & South East England Yorkshire & Humber

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