Mountain Weather
Information Service

Icon Information


Wind Show More

Light wind, negligible impact

Light wind, negligible impact

Little wind or walking hardly affected by the wind, but feeling chilly if exposed on tops. 10-15mph or less.

Moderate breeze, locally gusty

Moderate breeze, locally gusty

A noticeable breeze, feeling cool where exposed on tops. Locally may be gusty, but unlikely to affect walking progress. 15-25mph.

Windy, walking impeded

Windy, walking impeded

Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.

Gale force, walking arduous

Gale force, walking arduous

Considerable buffeting, walking into the wind will be strenuous on exposed terrain, stronger gusts may knock you off your feet. 40 to 55mph.

Severe gale or storm, mobility very difficult

Severe gale or storm, mobility very difficult

Severe conditions on the mountains, any movement very challenging, you may be blown over. 55-70mph+


Visibility Show More

Clear

Clear

Excellent or superb visibility, no navigation issues.

Clear over snow cover

Clear over snow cover

Excellent or superb visibility, but be aware that some paths over higher summits may be obscured by lying snow.

Poor visibility

Poor visibility

Very murky conditions, the mountains shrouded in fog, making navigation challenging. Map and compass essential.

Whiteout

Whiteout

Fog and lying snow over the mountains, possibly with falling or blowing snow, very disorientating. Map and compass essential, beware of unseen hazards such as cornices.


Precipitation Show More

Dry, Inversion

Dry, Inversion

Banks of cloud or fog on lower or middle slopes, but higher terrain likely clear and sunny above an inversion.

Sunshine and showers

Sunshine and showers

A good amount of dry and sunny weather, but a risk of scattered bursts of rain, some may be locally heavy with a chance of very isolated thunder.

Drizzle

Drizzle

Light rain or drizzle, total amounts small, but may be persistently damp, especially where hills are shrouded in cloud.

Frequent or persistent rain

Frequent or persistent rain

Steady rain fairly persistent, occasionally heavy, rather wet underfoot.

Heavy rain

Heavy rain

Near-constant heavy rain, sometimes torrential over the mountains, very wet underfoot.

Thunderstorm

Thunderstorm

Heavy or torrential downpours with hail, risk of thunder and lightning. Seek shelter where possible.

Snow flurries

Snow flurries

Occasional light snow flurries, sleet or rain lower elevations. Amounts little more than nuisance value, but locally more persistent and reducing visibility for periods.

Snow and hail showers

Snow and hail showers

Periods of bright or sunny conditions mixed with showers or flurries of snow and hail.

Dry and sunny

Dry and sunny

Extensive strong warm sunshine. The mountains free of cloud once any early mist patches disperse.

Mostly dry, partly cloudy

Mostly dry, partly cloudy

Dry most or all day. Variable amounts of sun and cloud, occasional patches drifting onto some higher slopes, but most summits often clear.

Heavy showers, snow and hail

Heavy showers, snow and hail

Showery precipitation, often heavy, may merge to become constant for periods. A mix of snow and hail on higher terrain, rain or hail lower down. Risk of a rumble of thunder and isolated lightning.


Temperature Show More

Cold

Cold

Near or below freezing on highest terrain all day. Considerable or significant chill factor if exposed to strong winds. Prepare for winter temperatures on the high mountains - suitable protective clothing required.

Cool

Cool

Temperatures above freezing but typically no higher than +5C over the tops - if exposed to brisk winds will feel sub-zero. May not feel cold when climbing, but noticeably cold when stationary. Carry suitable clothing.

Mild

Mild

Air temperature above freezing to highest summits. May feel pleasantly warm on lower ground, but take appropriate layers. Feeling chilly if exposed to wind.

Warm

Warm

Comfortable temperatures on the hills, feeling pleasantly warm especially on lower ground. Beware of feeling cooler if exposed to wind on higher terrain.

Hot

Hot

Very warm conditions across the hills, hot on lower terrain. Beware of dehydration. Carry plenty of liquid.

Very Hot

Very Hot

Heatwave conditions. Very high temperatures on higher and lower ground. Beware of heat stroke and dehydration. Carry plenty of liquid.


Hazards Show More

Winter kit required on higher mountains

Winter kit required on higher mountains

Snow cover over higher mountain terrain. Safe progress around some tops and ridges will require suitable footwear - possibly crampons and ice-axe where necessary.

Snowdrifts

Snowdrifts

Considerable lying snow over the mountains, with substantial drifting in places.

Terrain widely frozen

Terrain widely frozen

All ground frozen from lower elevations upward, with hard frost or snow cover. Beware of icy surfaces on lower and higher terrain. Appropriate footwear needed, crampons may be necessary.

Flooding

Flooding

Fast-flowing rivers and streams. Some routes may be impassable due to flooding.

Strong sunshine

Strong sunshine

High UV levels, beware of sunburn. Warm temperatures, rising above 20C in the valleys, beware of dehydration.