Mountain weather
Mourne Mountains Mountain weather forecast table
Confidence
High confidence for general evolution, but low confidence for details from Monday.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Gales
Gale force winds (gusts over 50mph) make walking difficult and strenuous with a potential to be blown over by gusts. There is often a marked increase in winds through cols or on exposed ridges and summits. Distances can take longer to cover and compass bearings become harder to follow accurately.
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
Dry, bright, cold by day. Rain, strong winds in evening.
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
Weather (at 700m) |
|
|
|
|
|
|
Chance of precipitation (at 700m) |
<05% | <05% | <05% | 20% | >95% | >95% |
Wind direction and speed (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
NW
24
|
W
11
|
SW
12
|
S
22
|
S
33
|
S
39
|
| 300m |
NW
12
|
NW
6
|
SW
5
|
SW
8
|
S
16
|
S
21
|
| Valley |
NW
10
|
NW
5
|
SW
4
|
S
6
|
S
13
|
S
17
|
Wind gust (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m | 34 | 17 | 17 | 29 | 45 | 53 |
| 300m | 23 | 12 | 9 | 15 | 28 | 36 |
| Valley | 22 | 12 | 8 | 14 | 26 | 34 |
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
1°
|
1°
|
2°
|
0°
|
2°
|
4°
|
| 300m |
2°
|
2°
|
4°
|
3°
|
4°
|
6°
|
| Valley |
2°
|
2°
|
5°
|
4°
|
5°
|
7°
|
| Freezing Level |
700m
|
700m
|
600m
|
700m
|
1,000m
|
1,700m
|
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
-6°
|
-4°
|
-3°
|
-6°
|
-6°
|
-4°
|
| 300m |
-3°
|
-1°
|
2°
|
0°
|
-1°
|
1°
|
| Valley |
-2°
|
0°
|
3°
|
2°
|
1°
|
2°
|
Additional weather information
Meteorologist's view
Feeling bitterly cold despite the fair weather so suitable clothing required. Note the deteriorating conditions in the evening with gusts over 40mph giving difficult walking conditions with a risk of being blown off balance. Navigation could be challenging with energy output significantly increased when walking into the wind.
Weather
Dry with light winds and clear then sunny spells through the day. Sunshine becomes hazier in the afternoon as high level cloud spreads east, before rain, low cloud and strong winds, with summit gales, through the evening.
Chance of cloud-free hill tops
Mostly 90% or higher. Falling 25% or less in the evening.
Low cloud and visibility
Summits largely clear and good visibilities through the day, but there may be the odd patch of valley fog or cloud over modest elevations in the morning. Widespread cloud down to 300-500m spreads east in the evening with visibilities falling poor in rain or hill fog.
Mountain weather information
Weather
Low confidence. Widespread cloud and rain through the morning. This should clear through the afternoon to leave bright spells and some showers, but chance that more persistent rain and cloud may linger. Feeling a bit less cold than Sunday.
Chance of cloud-free hill tops
25% or less at first. Rising to 70% in the afternoon.
Maximum wind speed expected
Southwest 30-40mph.
Temperature
- At 700m Plus 3C to plus 5C.
- Valley Plus 6C to plus 9C.
- Freezing level Above summits.
Low cloud and visibility
Widespread cloud down to 300-500m at first with poor visibilities in rain and hill fog. This cloud clearing by the afternoon leaving often clear summits and good visibilities. Chance of showers in the afternoon will cause cloud bases and visibilities to drop rapidly at times.
Mountain weather information
Tue 2 Dec
Sunrise:
Sunset:
Bright spells and a few showers. Freezing level around 1000m. Fresh to strong southwest winds.
Wed 3 Dec
Sunrise:
Sunset:
Another day of bright spells and a few showers. Freezing level around 1000-1200m. Fresh to strong southwest winds.
Thu 4 Dec
Sunrise:
Sunset:
Bright spells and scattered showers - chance of longer spells of rain. Freezing level around 1000m. Fresh to strong southwest winds.
Updated at:
Summit specific forecast
Mountain summit forecast map
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Key
Mountain summits
Other points of interest
Cluster of multiple stations
The Mourne Mountains are a granite mountain range in County Down in the southeast of Northern Ireland, is an area of outstanding natural beauty, and has been proposed as the first National Park in Northern Ireland.