Mountain weather
Mourne Mountains Mountain weather forecast table
Confidence
High for changeable conditions and becoming warmer, lower for daily cloud and rainfall details from Monday.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Strong Sunlight
Harmful UV levels from sunlight increase with altitude giving a greater risk of sunburn and eye damage, even on some overcast days. On breezy days, the cooling effect of wind on exposed skin may disguise any feeling of sunburn until it is too late. If there is snow cover, glare increases the effect of UV rays especially on the eyes. It is advisable to wear sun block, protective clothing such as a long-sleeved top and hat and have good quality eye protection.
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
Broken cloud, sunny intervals and occasional showers, briefly heavy. Fresh to strong summit winds.
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
Weather (at 700m) |
|
|
|
|
|
|
Chance of precipitation (at 700m) |
40% | 10% | 40% | 40% | 20% | 20% |
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
26
|
W
20
|
W
22
|
W
24
|
NW
26
|
W
23
|
| 300m |
W
11
|
W
11
|
W
13
|
W
14
|
NW
15
|
NW
11
|
| Valley |
W
9
|
W
9
|
W
10
|
W
12
|
NW
13
|
NW
9
|
Wind gust (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m | 35 | 27 | 31 | 34 | 36 | 32 |
| 300m | 21 | 19 | 22 | 25 | 26 | 21 |
| Valley | 21 | 19 | 21 | 24 | 25 | 19 |
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
5°
|
7°
|
8°
|
9°
|
9°
|
8°
|
| 300m |
7°
|
11°
|
12°
|
13°
|
12°
|
10°
|
| Valley |
8°
|
12°
|
13°
|
14°
|
14°
|
11°
|
| Freezing Level |
1,400m
|
1,500m
|
1,700m
|
1,800m
|
1,700m
|
1,600m
|
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
-1°
|
3°
|
4°
|
5°
|
5°
|
3°
|
| 300m |
4°
|
8°
|
10°
|
10°
|
10°
|
7°
|
| Valley |
6°
|
10°
|
11°
|
12°
|
11°
|
9°
|
Additional weather information
Meteorologist's view
A significant chill on the summits.
Weather
Cloud increasing around dawn with some showers, but soon breaking up in the morning to leave a mixture of broken cloud, sunny intervals and occasional showers, briefly heavy.
Chance of cloud-free hill tops
90%, but 60% for a time early in the day.
Low cloud and visibility
Cloud lowering to around 800m for a time early in the morning day then lifting and breaking to mainly above tops by mid-morning but some briefly moderate visibility in the heavier showers.
Mountain weather information
Weather
A mainly dry bright start but soon clouding over. Some sporadic rain in morning and early afternoon then becoming heavier and more persistent from mid afternoon, easing later in evening but remaining overcast and damp.
Chance of cloud-free hill tops
90% first thing, gradually falling 30% through the morning and little chance from mid afternoon.
Maximum wind speed expected
Westerly 20 gusts 30mph becoming southwesterly 30 gusts 40mph.
Temperature
- At 700m Plus 7 Celsius rising Plus 10 during the evening
- Valley Plus 8 rising to Plus 14 Celsius
- Freezing level Above summits
Low cloud and visibility
No low cloud and good visibility first thing but cloud then lowering to 700m during the morning then down to 450m from mid afternoon, at least over southern and western exposures with some lower patches, and some moderate to poor visibility in rain at lower levels too.
Mountain weather information
Tue 10 Jun
Sunrise:
Sunset:
A dull damp morning with extensive hill fog and a little patchy rain. Probably brightening up during the afternoon with cloud lifting. Moderate summit winds.
Wed 11 Jun
Sunrise:
Sunset:
Probably a cloudy start with some hill fog and patchy rain then brightening up from the south to bring some sunshine in the afternoon. Turning warmer with fresh southerly winds.
Thu 12 Jun
Sunrise:
Sunset:
Bright or sunny intervals but the chance of some heavy thundery showers, perhaps longer spells of heavy rain. Warm and humid.
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.