Mountain weather
Mourne Mountains Mountain weather forecast table
Confidence
High confidence for settled conditions, with light winds and sunshine for many, remaining for the weekend and early next week, the main uncertainties in the forecasts are about whether showers develop at times and where and also any low cloud developing.
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
Low cloud likely to be persistent in the morning but becoming bright and sunny in the afternoon. Fresh northwesterly winds.
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
Weather (at 700m) |
|
|
|
|
|
|
Chance of precipitation (at 700m) |
<05% | <05% | 10% | 10% | 00% | 00% |
Wind direction and speed (mph)
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m |
N
16
|
N
18
|
N
16
|
N
16
|
NW
16
|
NW
16
|
| 300m |
N
13
|
N
13
|
N
12
|
N
12
|
N
13
|
NW
13
|
| Valley |
N
13
|
N
12
|
N
12
|
N
12
|
N
13
|
N
13
|
Wind gust (mph)
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m | 21 | 25 | 23 | 24 | 24 | 22 |
| 300m | 20 | 20 | 20 | 20 | 21 | 21 |
| Valley | 21 | 21 | 20 | 22 | 22 | 21 |
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m |
8°
|
9°
|
12°
|
13°
|
12°
|
9°
|
| 300m |
11°
|
12°
|
16°
|
17°
|
15°
|
11°
|
| Valley |
11°
|
13°
|
17°
|
17°
|
15°
|
12°
|
| Freezing Level |
2,200m
|
2,200m
|
2,300m
|
2,300m
|
2,400m
|
2,500m
|
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m |
5°
|
6°
|
10°
|
11°
|
9°
|
6°
|
| 300m |
8°
|
10°
|
14°
|
15°
|
12°
|
8°
|
| Valley |
9°
|
11°
|
15°
|
15°
|
13°
|
9°
|
Additional weather information
Meteorologist's view
Light winds and strong sunshine will mean the heat may be a hazard during the afternoon.
Weather
Cloud is likely to be persistent in the morning but will start to clear to leave a bright and sunny afternoon and a clear and dry evening, some cloud may spread into eastern areas later in the evening.
Chance of cloud-free hill tops
50% improving to 90%, patchy low cloud will affect the area first thing in the morning.
Low cloud and visibility
Scattered or broken low cloud above 500m will affect the area in the morning but this will mostly clear away with very good visibility expected in the afternoon. It may become hazy in the afternoon.
Mountain weather information
Weather
Another mostly dry and sunny day ahead. Eastern areas may have some low cloud at first but this should burn away during the morning. The odd isolated shower may develop in the afternoon.
Chance of cloud-free hill tops
95%, patchy cloud in the east at first.
Maximum wind speed expected
North or Northeast 10-15mph
Temperature
- At 700m Plus 8 rising to 14 Celsius.
- Valley Plus 9 rising to 17 Celsius.
- Freezing level Above all summits.
Low cloud and visibility
Patchy cloud around 700m may affect hills first thing but otherwise all cloud above the summits and very good visibility with good views likely.
Mountain weather information
Mon 20 May
Sunrise:
Sunset:
Remaining settled with plenty of sunshine and feeling warm with light winds. Early fog.
Tue 21 May
Sunrise:
Sunset:
A mainly dry day although some heavy showers may develop. Light and variable winds and remaining warm.
Wed 22 May
Sunrise:
Sunset:
Light to moderate northwesterly winds, cloudy but some sunny spells, risk of heavy afternoon showers.
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.