Mountain weather
Mourne Mountains Mountain weather forecast table
Confidence
High confidence for unsettled weather. Low confidence for details on Monday especially.
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
Cloud, rain in morning. Dry, bright afternoon. Cold. Windy.
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
Weather (at 700m) |
|
|
|
|
|
|
Chance of precipitation (at 700m) |
50% | 30% | 20% | 10% | <05% | <05% |
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
14
|
N
20
|
N
30
|
N
32
|
N
35
|
NW
32
|
| 300m |
N
7
|
N
12
|
N
16
|
N
17
|
N
17
|
NW
16
|
| Valley |
NW
7
|
N
11
|
N
13
|
N
14
|
N
14
|
NW
13
|
Wind gust (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m | 19 | 27 | 41 | 44 | 49 | 44 |
| 300m | 12 | 20 | 28 | 30 | 32 | 30 |
| Valley | 13 | 20 | 27 | 29 | 30 | 28 |
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
2°
|
1°
|
1°
|
0°
|
0°
|
-1°
|
| 300m |
4°
|
4°
|
4°
|
3°
|
2°
|
1°
|
| Valley |
4°
|
5°
|
5°
|
4°
|
3°
|
2°
|
| Freezing Level |
1,000m
|
900m
|
800m
|
600m
|
400m
|
400m
|
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
-3°
|
-5°
|
-6°
|
-8°
|
-9°
|
-9°
|
| 300m |
1°
|
0°
|
-1°
|
-2°
|
-4°
|
-5°
|
| Valley |
2°
|
1°
|
0°
|
0°
|
-2°
|
-3°
|
Additional weather information
Meteorologist's view
Notably colder than recent days with a severe wind chill at height, especially later in the day as freezing level falls. Windy conditions will make for fairly arduous walking on exposed terrain with buffeting of clothing. Balance may be affected at times. Limited visibility at first, improving through the day.
Weather
Widespread cloud and light rain in the early morning. This clearing southeast through mid- to late morning allowing a dry day with increasing clear spells towards the evening. Feeling colder than recent days. Chance of gales over the highest summits.
Chance of cloud-free hill tops
25% or less at first. Rising to 75% or higher from afternoon.
Low cloud and visibility
Widespread cloud down to 500-700m and visibilities moderate or poor in the morning. Cloud and rain clearing to allow largely clear summits and good visibilities through the afternoon and evening.
Mountain weather information
Weather
Chance of the odd shower before dawn. Otherwise dry with bright spells much of the day, before rain, cloud and strong winds spread east through the late afternoon and evening.
Chance of cloud-free hill tops
60% before dawn, 80% or higher by day, falling little chance in evening.
Maximum wind speed expected
West-northwest 25-30mph at first, easing through the day. Strengthening southerly 50-60mph in evening.
Temperature
- At 700m Minus 2C rising to 0C.
- Valley 0C rising to plus 7C.
- Freezing level 400m rising above summits in evening.
Low cloud and visibility
The odd patch of cloud around summit height possible and visibilities temporarily dropping moderate or poor should any showers pass through before dawn. Clear summits and good visibilities by day. Widespread cloud down to 300-500m and visibilities dropping poor as rain spreads east later.
Mountain weather information
Mon 1 Dec
Sunrise:
Sunset:
Low confidence. Showers and occasionally longer spells of rain, heavy at times. Likely strong winds. Freezing level above summits, falling to 900m later.
Tue 2 Dec
Sunrise:
Sunset:
Bright spells and showers, heavy at times. Strong southwest winds. Freezing level 800-1000m.
Wed 3 Dec
Sunrise:
Sunset:
Showers, perhaps forming longer spells of rain. Freezing level around 1200m. Fresh 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.