Mountain weather
Mourne Mountains Mountain weather forecast table
Confidence
High for the cold weather to continue. Lower for cloud and snow shower detail.
This evening forecast
A dry evening with some clear spells, but the chance of low level fog patches developing. Moderate northwest breeze on tops and freezing at most levels.
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.
Mountain weather forecast
A dry day with variable cloud and some bright or sunny spells. Perhaps some low cloud and fog patches.
| 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|---|---|
Weather (at 700m) |
|
|
|
|
|
|
|
|
Chance of precipitation (at 700m) |
<05% | <05% | <05% | <05% | <05% | 10% | <05% | <05% |
Wind direction and speed (mph)
Altitude above mean sea level
| 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|---|---|
| 600m |
NW
16
|
NW
20
|
NW
20
|
NW
20
|
NW
19
|
NW
17
|
NW
17
|
W
19
|
| 300m |
N
10
|
NW
12
|
NW
12
|
NW
13
|
NW
13
|
NW
10
|
NW
9
|
W
9
|
| Valley |
N
9
|
NW
11
|
NW
11
|
NW
12
|
NW
12
|
NW
10
|
NW
9
|
W
8
|
Wind gust (mph)
Altitude above mean sea level
| 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|---|---|
| 600m | 22 | 28 | 29 | 29 | 28 | 24 | 25 | 28 |
| 300m | 17 | 21 | 22 | 22 | 23 | 18 | 18 | 18 |
| Valley | 17 | 20 | 20 | 21 | 21 | 18 | 18 | 18 |
Altitude above mean sea level
| 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|---|---|
| 600m |
-2°
|
-3°
|
-3°
|
-3°
|
-2°
|
-2°
|
-2°
|
-3°
|
| 300m |
-1°
|
-1°
|
-2°
|
-2°
|
0°
|
0°
|
-1°
|
-1°
|
| Valley |
0°
|
-1°
|
-1°
|
-1°
|
1°
|
1°
|
0°
|
0°
|
| Freezing Level |
100m
|
100m
|
100m
|
100m
|
200m
|
300m
|
300m
|
300m
|
Altitude above mean sea level
| 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|---|---|
| 600m |
-8°
|
-10°
|
-10°
|
-10°
|
-9°
|
-9°
|
-9°
|
-10°
|
| 300m |
-5°
|
-6°
|
-7°
|
-7°
|
-5°
|
-4°
|
-5°
|
-6°
|
| Valley |
-4°
|
-6°
|
-6°
|
-6°
|
-4°
|
-3°
|
-4°
|
-4°
|
Additional weather information
Meteorologist's view
Low cloud and fog the main uncertainty over the next couple of days.
Weather
Dry with mainly clear skies over the higher hills, increasing chance of low cloud, mist or freezing fog at lower levels especially in the north. Some sunshine on Friday, especially in the morning on the upper slopes, but low cloud, giving some fog at low levels in the north, likely to rise up the slopes to bring an increased chance of hill fog in the afternoon, though could well stay clear to the south of the hills.
Chance of cloud-free hill tops
80% falling 30%
Low cloud and visibility
Areas of low cloud below 400m in the north this tending to lift up to between 400 and 700m, probably clear to the south of the hills. Very poor visibility in cloud and fog but away from that generally good.
Mountain weather information
Weather
Another generally dry day, with some bright or sunny spells, mainly in the south. Fog and low cloud probable in the north. Chance of one or two light snow showers later in the evening.
Chance of cloud-free hill tops
40%
Maximum wind speed expected
North or northwest 10-15mph.
Temperature
- At 700m Minus 4 Celsius
- Valley Minus 3 Celsius rising to Plus 2 at best
- Freezing level All levels
Low cloud and visibility
Again the chance of some fog or freezing fog at low levels especially to the north of the hills and perhaps up to 600m in the north,
Mountain weather information
Sun 11 Dec
Sunrise:
Sunset:
Clear or sunny spells and scattered showers, these mainly of snow but rain nearer the coast at low levels. Freezing level 300m or less. Light winds/
Mon 12 Dec
Sunrise:
Sunset:
A mainly dry day with some longer sunny spells, and just the chance of a passing light snow shower. Freezing level 300m with a fresh easterly wind.
Tue 13 Dec
Sunrise:
Sunset:
Again mainly dry and bright but cold with a stronger east or southeast wind, freezing level around 300m
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.
The Mourne Mountains include the highest mountains in Northern Ireland; the highest of these is Slieve Donard standing at 850 metres at the northeastern edge of the Mournes, overlooking Newcastle and Dundrum Bay. At the summit of Slieve Donard there is a cairn and a small stone tower, which is part of the Mourne Wall, which passes over the mountain’s southern and western shoulders.
The Mourne Wall is a 35 kilometre dry stone wall that crosses fifteen summits, constructed between 1904 and 1922 by the Belfast Water Commissioners to define and enclose the catchment area for the newly constructed Silent Valley Reservoir.v