Mountain weather

Mountain weather

Mourne Mountains

Confidence

High confidence for unsettled and showery conditions over the next few days but low confidence from Thursday onwards with regards to wind and rain detail.

Mountain hazards

Mountain weather hazards

Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.

Thunderstorms
Lightning is a significant mountain hazard which can result in serious injury or death. Mountain terrain often leaves one highly exposed to lightning strikes. Hail may give unpleasant conditions with torrential rain and localised flash flooding also possible, mainly in Summer months.
Strong Sunlight
Harmful UV levels from sunlight increase with altitude giving a greater risk of sunburn and eye damage, even on some overcast days. On breezy days, the cooling effect of wind on exposed skin may disguise any feeling of sunburn until it is too late. If there is snow cover, glare increases the effect of UV rays especially on the eyes. It is advisable to wear sun block, protective clothing such as a long-sleeved top and hat and have good quality eye protection.

Severe Chill Effect
Wind significantly lowers the ‘feels-like’ temperature relative to the actual temperature, with even moderate winds significantly adding to the chilling effect. Strong winds can result in a severe and debilitating wind chill many degrees below the actual temperature. This effect will be enhanced in rain or wet snow. Without protection, prolonged exposure could result in frost nip or frostbite on exposed parts of the body and/or hypothermia.
Poor Visibility
Poor visibility presents challenging route finding conditions. Visibility could be significantly less than 50 metres in all directions with few or no visual references, especially on featureless moors or plateaux. Distances become hard to judge and cliff or cornice edges can be difficult to recognise. These conditions require good navigational skills. There is a risk of white-out conditions when mist or fog is combined with extensive snow cover.

Mountain weather forecast

Sunny spells with heavy, perhaps thundery, showers later. Windy at times.

Time
Time
06:00
09:00
12:00
15:00
18:00
21:00
Weather
(at 800m)
Weather symbols Sunny Sunny intervals Sunny intervals Heavy rain showers Heavy rain showers Heavy rain showers
Chance of
precipitation
(at 800m)
Chance of precipitation
<5%
<5%
40%
70%
70%
70%

Wind direction and speed

Altitude above mean sea level
Time
Time
06:00
09:00
12:00
15:00
18:00
21:00
600m
600m W 24mph knots
W
24mph
W 19mph knots
W
19mph
SW 19mph knots
SW
19mph
SW 22mph knots
SW
22mph
SW 21mph knots
SW
21mph
SW 26mph knots
SW
26mph
300m
300m W 10mph knots
W
10mph
W 11mph knots
W
11mph
W 12mph knots
W
12mph
SW 12mph knots
SW
12mph
SW 12mph knots
SW
12mph
SW 13mph knots
SW
13mph
Valley
Valley W 9mph knots
W
9mph
W 9mph knots
W
9mph
SW 10mph knots
SW
10mph
W 11mph knots
W
11mph
SW 10mph knots
SW
10mph
SW 11mph knots
SW
11mph

Wind gust

Altitude above mean sea level
Time
Time
06:00
09:00
12:00
15:00
18:00
21:00
600m
600m 34mph 26mph 27mph 30mph 30mph 37mph
300m
300m 20mph 19mph 21mph 21mph 21mph 24mph
Valley
Valley 20mph 18mph 20mph 21mph 22mph 25mph

Altitude above mean sea level
Time
Time
06:00
09:00
12:00
15:00
18:00
21:00
600m
600m -1 degrees Celsius 2 degrees Celsius 4 degrees Celsius 4 degrees Celsius 3 degrees Celsius 0 degrees Celsius
300m
300m 4 degrees Celsius 7 degrees Celsius 9 degrees Celsius 8 degrees Celsius 8 degrees Celsius 5 degrees Celsius
Valley
Valley 6 degrees Celsius 9 degrees Celsius 11 degrees Celsius 10 degrees Celsius 10 degrees Celsius 7 degrees Celsius
Freezing Level Freezing Level
1000m
1200m
1400m
1500m
1500m
1400m

Additional weather information

Meteorologist's view

A risk of thunderstorms in the afternoon. Strong gusts at times may make for slow progress and feeling a little chilly on highest routes.

Weather

Dry with sunny spells through the morning. Becoming a little cloudier in the afternoon with showers developing, which may be heavy and thundery at times. Turning dry again by late evening. Fresh to strong west or southwesterly winds.

Chance of cloud-free hill tops

90%.

Low cloud and visibility

Cloud mostly above summits, possibly dropping below at times in showers. Good visibility but falling to a few kilometres in heavy showers.

Ground conditions

No recent ground conditions report available.

Summit specific forecast