Mountain weather
Mourne Mountains Mountain weather forecast table
Confidence
High for cold, wintry conditions through the coming days but lower for distribution and timing of any showers.
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.
Mountain weather forecast
Mainly dry with sunny spells. Cold with occasionally strong northwesterly winds easing
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
Weather (at 700m) |
|
|
|
|
|
|
Chance of precipitation (at 700m) |
20% | <05% | <05% | 20% | 20% | 20% |
Wind direction and speed (mph)
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m |
NW
18
|
N
15
|
NW
20
|
NW
19
|
NW
16
|
N
18
|
| 300m |
N
11
|
N
9
|
NW
12
|
N
11
|
N
10
|
N
10
|
| Valley |
NW
9
|
N
7
|
N
11
|
N
10
|
NW
9
|
N
8
|
Wind gust (mph)
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m | 24 | 19 | 28 | 27 | 22 | 25 |
| 300m | 18 | 15 | 21 | 21 | 17 | 18 |
| Valley | 17 | 14 | 20 | 20 | 17 | 17 |
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m |
-1°
|
-2°
|
-3°
|
-2°
|
-3°
|
-2°
|
| 300m |
1°
|
0°
|
0°
|
0°
|
-1°
|
-1°
|
| Valley |
1°
|
1°
|
1°
|
1°
|
0°
|
0°
|
| Freezing Level |
400m
|
200m
|
200m
|
200m
|
200m
|
200m
|
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m |
-8°
|
-8°
|
-10°
|
-9°
|
-9°
|
-9°
|
| 300m |
-4°
|
-4°
|
-5°
|
-5°
|
-6°
|
-5°
|
| Valley |
-3°
|
-3°
|
-3°
|
-3°
|
-4°
|
-4°
|
Additional weather information
Meteorologist's view
Minimum temperatures around minus 2 or 3 Celsius at dawn. Frozen surfaces likely at all but the lowest levels through the day.
Weather
A few wintry showers through the early hours with some clear spells around. Then mainly dry through the morning and early afternoon with some good spells of sunshine developing. From mid-afternoon there is an increasing risk of a few mainly light snow showers.
Chance of cloud-free hill tops
Close to 100% through the morning becoming nearer 60% through the afternoon
Low cloud and visibility
Little or no cloud expected below the summits through the morning then occasional or periods of cloud above about 600m developing through the afternoon. Away from cloud visibility generally very good, perhaps falling briefly to a kilometre or so in snow showers.
Mountain weather information
Weather
Mainly dry with clear spells overnight. Then another cold but bright day with sunny spells and just a few snow showers, these dying out later.
Chance of cloud-free hill tops
Around 75%
Maximum wind speed expected
Northwesterly 15-20mph gradually backing westerly 10-15mph
Temperature
- At 700m Minus 5 Celsius rising briefly to minus 2 Celsius by day
- Valley Minus 3 or 4 Celsius at dawn rising to 2 or 3 Celsius by day
- Freezing level Frozen surfaces likely at all but the lowest levels through the day.
Low cloud and visibility
Occasional cloud above about 600m, otherwise visibility very good, perhaps falling to a kilometre or so briefly in snow showers
Mountain weather information
Sat 10 Dec
Sunrise:
Sunset:
Cold with bright or sunny spells, risk of occasional snow showers around the middle of the day. Mainly light northwesterly winds. Frozen surfaces likely at all but the lowest levels through the day.
Sun 11 Dec
Sunrise:
Sunset:
Mainly dry with some long spells of sunshine but remaining cold. Light northwesterly winds. Frozen surfaces likely at all but the lowest levels through the day.
Mon 12 Dec
Sunrise:
Sunset:
Another cold but mainly dry day. Freshening easterly winds with freezing levels rising to 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