Mountain weather
Mourne Mountains Mountain weather forecast table
Confidence
Confidence is high for dry periods with bands of rain and showers passing northeast at times with the frequency of unsettled conditions increasing from Friday.
This evening forecast
The evening will continue dry with clear periods. Strong southwest summit winds.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
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.
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.
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
Cloudy with patchy rain at first otherwise dry with fresh to strong southwest summit winds.
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
Weather (at 700m) |
|
|
|
|
|
|
|
|
Chance of precipitation (at 700m) |
10% | 10% | 50% | 60% | 40% | 30% | 30% | 80% |
Wind direction and speed (mph)
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
SW
25
|
SW
26
|
SW
22
|
SW
23
|
SW
21
|
S
22
|
S
31
|
S
37
|
| 300m |
SW
7
|
SW
8
|
SW
8
|
SW
8
|
SW
9
|
S
9
|
S
16
|
S
19
|
| Valley |
SW
5
|
SW
6
|
S
6
|
SW
6
|
S
7
|
S
8
|
S
13
|
S
17
|
Wind gust (mph)
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m | 34 | 35 | 30 | 32 | 28 | 29 | 43 | 50 |
| 300m | 16 | 18 | 16 | 16 | 15 | 17 | 28 | 33 |
| Valley | 15 | 17 | 14 | 17 | 13 | 17 | 26 | 33 |
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
1°
|
1°
|
1°
|
2°
|
2°
|
3°
|
4°
|
4°
|
| 300m |
3°
|
2°
|
2°
|
3°
|
4°
|
5°
|
6°
|
6°
|
| Valley |
3°
|
3°
|
3°
|
4°
|
6°
|
6°
|
7°
|
7°
|
| Freezing Level |
900m
|
1,000m
|
1,100m
|
1,100m
|
1,100m
|
1,100m
|
1,100m
|
1,200m
|
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
-6°
|
-6°
|
-6°
|
-4°
|
-4°
|
-3°
|
-3°
|
-3°
|
| 300m |
0°
|
-1°
|
-1°
|
0°
|
1°
|
2°
|
2°
|
1°
|
| Valley |
2°
|
0°
|
1°
|
2°
|
3°
|
4°
|
3°
|
3°
|
Additional weather information
Meteorologist's view
With strong winds at height, the chill effect means that sufficient warm clothing will be required.
Weather
Dry with clear spells at first then a band of cloud with patch rain will pass east towards the morning. Any early rain will soon clear as the cloud lifts through the morning. Cloud and rain will spread east late in the evening with sleet or snow on above 700m.
Chance of cloud-free hill tops
60% the best of this in the afternoon.
Low cloud and visibility
Low cloud down to 400-600m at times in the early morning, lifting above the summits from late morning.
Mountain weather information
Weather
The best of any clear or bright spells will be in the early morning or again from the late afternoon with the main part of the day staying cloudy but dry.
Chance of cloud-free hill tops
30%.
Maximum wind speed expected
Southwest 20-25mph gust 35mph.
Temperature
- At 700m Plus 4C
- Valley Plus 1C rising plus 7C
- Freezing level 600m.
Low cloud and visibility
Broken cloud 400-500m through much of the day with visibility good outwith the cloud.
Mountain weather information
Fri 5 Dec
Sunrise:
Sunset:
Dry morning with cloud increasing and outbreaks of heavy rain from the afternoon. Strong southeast summit winds. Freezing level above the summits.
Sat 6 Dec
Sunrise:
Sunset:
Cloudy with rain. Near gale east summit winds. Freezing level above the summits.
Sun 7 Dec
Sunrise:
Sunset:
Low cloud and rain for most of the day. Strong southeast summit winds. Freezing level above the summits.
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.