Mountain weather
Mourne Mountains Mountain weather forecast table
Confidence
High for general evolution but low for details on Sunday.
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.
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.
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.
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.
Mountain weather forecast
Widespread cloud. Showery rain. Strong winds. Cold.
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
Weather (at 700m) |
|
|
|
|
|
|
Chance of precipitation (at 700m) |
30% | 50% | 70% | 70% | 50% | 30% |
Wind direction and speed (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
W
39
|
W
39
|
W
41
|
W
40
|
W
34
|
NW
34
|
| 300m |
W
20
|
W
21
|
W
23
|
W
23
|
W
19
|
NW
20
|
| Valley |
W
16
|
W
17
|
W
19
|
W
20
|
W
16
|
NW
17
|
Wind gust (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m | 53 | 54 | 57 | 56 | 48 | 46 |
| 300m | 35 | 36 | 40 | 40 | 33 | 34 |
| Valley | 33 | 34 | 38 | 38 | 31 | 33 |
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
1°
|
1°
|
2°
|
2°
|
2°
|
1°
|
| 300m |
4°
|
3°
|
4°
|
4°
|
4°
|
4°
|
| Valley |
5°
|
4°
|
5°
|
5°
|
5°
|
5°
|
| Freezing Level |
800m
|
800m
|
800m
|
900m
|
1,000m
|
900m
|
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
-7°
|
-7°
|
-7°
|
-7°
|
-6°
|
-6°
|
| 300m |
-2°
|
-3°
|
-2°
|
-2°
|
-1°
|
-2°
|
| Valley |
0°
|
-1°
|
0°
|
0°
|
1°
|
0°
|
Additional weather information
Meteorologist's view
Feeling bitterly cold so suitable clothing is advised. Gusts over 40mph will give 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
Band of heavy rain with a chance on thunder crosses in the early hours. For the rest of the day it will be cloudy with showers, these wintry above around 700-800m at times. Feeling bitterly cold with strong winds, chance of gale force gusts over the highest summits.
Chance of cloud-free hill tops
20% or less
Low cloud and visibility
Widespread cloud down to 300-500m throughout the day and visibilities dropping moderate or poor in showers or hill fog. Only a small chance of limited breaks through the afternoon and evening.
Mountain weather information
Weather
Cloudy in the early morning with the chance of a few showers. Becoming increasingly dry and bright through the day. Still feeling cold in fresh to strong north to northwest winds.
Chance of cloud-free hill tops
Little chance in early hours. Rising to 75% by late morning.
Maximum wind speed expected
North to northwest 30-40mph at times.
Temperature
- At 700m 0C to plus 2C.
- Valley Plus 4C rising to plus 8C.
- Freezing level 1000m falling to 800m.
Low cloud and visibility
Widespread cloud down to 500m or so in the early hours. This lifting and breaking through the morning to leave often clear summits and good visibilities through the day, with only the odd temporary patch of cloud down around 700-800m.
Mountain weather information
Tue 25 Nov
Sunrise:
Sunset:
Mostly dry with bright spells and variable cloud, chance of the odd morning shower. Light to moderate winds. Freezing level around 800m
Wed 26 Nov
Sunrise:
Sunset:
Cloud and rain spread east. Becoming much milder as freezing level rises well above summits. Strong south to southwest winds.
Thu 27 Nov
Sunrise:
Sunset:
Staying cloudy with spells of rain. Freezing level remains above summits. Strong south to 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.