Mountain weather
Mourne Mountains Mountain weather forecast table
Confidence
Generally high confidence for Wednesday, but some uncertainty on the extent of rain in the evening.
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
A mainly dry, cold day with patchy cloud. Turning cloudier with patchy rain in the evening.
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
Weather (at 700m) |
|
|
|
|
|
|
Chance of precipitation (at 700m) |
20% | 20% | 10% | 10% | 70% | 90% |
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
41
|
NW
36
|
NW
26
|
W
14
|
SW
7
|
S
13
|
| 300m |
NW
20
|
NW
17
|
NW
13
|
SW
5
|
SW
3
|
SW
4
|
| Valley |
NW
16
|
NW
14
|
NW
11
|
W
5
|
SW
2
|
SW
2
|
Wind gust (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m | 56 | 50 | 36 | 21 | 9 | 18 |
| 300m | 38 | 33 | 23 | 10 | 6 | 9 |
| Valley | 36 | 32 | 23 | 13 | 7 | 8 |
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
-2°
|
-2°
|
-1°
|
-1°
|
-1°
|
0°
|
| 300m |
0°
|
0°
|
1°
|
2°
|
0°
|
0°
|
| Valley |
1°
|
1°
|
3°
|
3°
|
1°
|
1°
|
| Freezing Level |
200m
|
200m
|
300m
|
400m
|
400m
|
600m
|
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
-12°
|
-12°
|
-9°
|
-6°
|
-5°
|
-6°
|
| 300m |
-7°
|
-6°
|
-4°
|
-1°
|
-2°
|
-2°
|
| Valley |
-5°
|
-5°
|
-2°
|
0°
|
0°
|
0°
|
Additional weather information
Meteorologist's view
A very cold day with a bitter wind-chill. Challenging walking on summits in strong winds during the morning but winds easing in the afternoon.
Weather
A few showers in the early morning, falling as snow above 200m. Otherwise the day will be mainly dry and bright before a band of patchy rain pushes east over the area from the evening, falling as snow down to 300-400m at first. Strong northwesterly winds in the morning with a risk of gales on summits at first.
Chance of cloud-free hill tops
80% during daytime, falling to 10% in the evening.
Low cloud and visibility
The visibility will be very good, falling poor in rain or summit snow later. Cloud will be patchy at first becoming broken in the afternoon with a base 700-800m but falling to 400m or less in the evening.
Mountain weather information
Weather
A bright day with some hazy sunny spells. Winds much lighter winds compared to of late during daytime, albeit still feeling cold. Cloud increasing by evening with the risk of a few showers, falling as snow above 500m.
Chance of cloud-free hill tops
60%
Maximum wind speed expected
Gusting 20-25mph on summits in the evening.
Temperature
- At 700m Zero Celsius.
- Valley Plus 2 Celsius.
- Freezing level 700m.
Low cloud and visibility
A few patches of cloud around summit level, otherwise visibility will be good. Cloud bases increasing around 500m in the evening with visibility deteriorating in showers.
Mountain weather information
Fri 9 Jan
Sunrise:
Sunset:
A cold day and fairly cloudy with a few showers. Moderate to fresh summit winds.
Sat 10 Jan
Sunrise:
Sunset:
A cold day with the odd wintry shower to start but turning drier and brighter. Fresh to strong summit winds.
Sun 11 Jan
Sunrise:
Sunset:
Turning unsettled and very windy with rain spreading in from the west.
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.