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Llyn Y Fan Fawr

Llyn Y Fan Fawr last 24 hours
  • 7°C -2°C
    Cloudy
  • 3°C -2°C
    Cloudy
  • 5°C -2°C
    Sunny intervals
  • 6°C 1°C
    Cloudy
  • 7°C 0°C
    Cloudy
  • 8°C 3°C
    Cloudy
  • 8°C 2°C
    Light rain
Monday   (24 April 2017)
1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300
Cloudy Overcast Heavy rain Light rain Overcast Cloudy Cloudy Cloudy Sunny intervals Partly cloudy night Partly cloudy night Clear night
Temperature (°C)
6 5 5 5 4 4 4 3 2 1 0 -1
Feels like temperature (°C) arrow down
2 1 1 0 -1 -1 -2 -3 -5 -6 -7 -8
Precipitation probability arrow down
10% 20% 80% 60% 10% 10% <5% 10% <5% <5% <5% <5%
Wind direction, speed & gust (mph) arrow down
WNW 16 23 NW 15 21 NW 16 21 NW 17 23 NNW 19 25 NNW 20 26 NNW 21 28 NNW 21 28 NNW 21 27 NNW 21 27 NNW 20 27 NNW 20 26
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor) arrow down
G M VP VP VG E E E E E E E
Humidity arrow down
96% 98% 97% 97% 93% 82% 76% 73% 76% 74% 78% 77%
UV index arrow down
3 3 3 2 2 2 1 1 1 0 0 0
Tuesday   (25 April 2017)
0000 0100 0200 0300 0400 0500 0600 0700 0800 0900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300
Clear night Partly cloudy night Cloudy Light snow Heavy snow Light snow Partly cloudy night Sunny day Sunny day Sunny day Cloudy Sunny intervals Sunny intervals Sunny intervals Light snow shower day Cloudy Cloudy Cloudy Sunny intervals Sunny intervals Cloudy Partly cloudy night Clear night Partly cloudy night
Temperature (°C)
-1 -1 -1 -1 -1 -1 -1 -1 -1 0 1 2 2 3 2 3 3 3 2 2 2 1 1 0
Feels like temperature (°C) arrow down
-8 -7 -7 -8 -8 -7 -8 -8 -7 -6 -6 -5 -4 -4 -4 -3 -3 -3 -3 -3 -3 -4 -5 -5
Precipitation probability arrow down
<5% <5% 10% 50% 80% 50% 10% <5% <5% <5% 10% 10% 10% 10% 30% 20% 20% 20% 10% 10% 10% 10% <5% <5%
Wind direction, speed & gust (mph) arrow down
NNW 18 25 NNW 15 21 NW 15 21 NW 18 23 NW 18 23 NNW 17 23 NNW 18 25 NNW 18 24 NNW 19 25 NNW 19 26 NNW 20 28 NNW 20 29 NNW 21 30 NNW 22 32 NNW 21 30 NNW 21 31 NNW 21 31 NNW 20 29 NNW 18 27 N 16 23 N 14 21 N 14 21 N 14 20 NNE 14 20
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor) arrow down
E E E P P P VG E E E M E E E E E VG E E E E E E E
Humidity arrow down
77% 76% 80% 92% 95% 95% 94% 91% 86% 80% 79% 72% 69% 68% 72% 66% 68% 72% 70% 75% 76% 79% 84% 87%
UV index arrow down
0 0 0 0 0 0 0 1 2 3 3 4 5 6 5 4 3 2 1 1 1 0 0 0
Wednesday   (26 April 2017)
0000 0100 0400 0700 1000 1300 1600 1900 2200
Clear night Clear night Clear night Sunny day Sunny intervals Sunny intervals Sunny intervals Cloudy Clear night
Temperature (°C)
0 -1 -2 -2 2 4 5 4 0
Feels like temperature (°C) arrow down
-6 -6 -7 -7 -3 0 1 0 -4
Precipitation probability arrow down
<5% <5% <5% <5% <5% <5% 10% 10% <5%
Wind direction, speed & gust (mph) arrow down
NNE 13 19 NNE 13 19 NNE 14 21 NNE 14 21 NNE 13 24 NNE 12 22 N 11 22 NNW 11 19 NNE 9 12
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor) arrow down
E E E VG E E VG VG VG
Humidity arrow down
90% 92% 91% 88% 70% 59% 55% 58% 75%
UV index arrow down
0 0 0 1 3 6 3 1 0
Thursday   (27 April 2017)
0100 0400 0700 1000 1300 1600 1900 2200
Clear night Partly cloudy night Sunny intervals Overcast Cloudy Light rain Cloudy Cloudy
Temperature (°C)
-2 -2 -1 3 5 5 5 3
Feels like temperature (°C) arrow down
-6 -5 -4 -1 1 2 1 0
Precipitation probability arrow down
<5% <5% <5% 10% 10% 50% 20% 10%
Wind direction, speed & gust (mph) arrow down
NNE 7 10 NW 6 8 NW 5 9 WNW 9 17 NW 10 20 NNW 12 22 NNW 12 20 NNW 9 14
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor) arrow down
VG VG VG G M G G M
Humidity arrow down
85% 83% 86% 83% 83% 85% 88% 96%
UV index arrow down
0 0 1 2 4 2 1 0
Friday   (28 April 2017)
0100 0400 0700 1000 1300 1600 1900 2200
Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Partly cloudy night
Temperature (°C)
2 2 2 5 6 7 6 3
Feels like temperature (°C) arrow down
-1 -1 -1 1 3 4 2 0
Precipitation probability arrow down
10% 10% 20% 20% 10% 10% 10% 10%
Wind direction, speed & gust (mph) arrow down
NNW 9 13 NNW 8 12 NNW 8 12 N 10 19 N 10 20 N 10 20 NNW 10 18 NNW 10 15
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor) arrow down
G M M M VG VG VG VG
Humidity arrow down
98% 98% 98% 85% 76% 72% 76% 84%
UV index arrow down
0 0 1 3 4 2 1 0
Saturday   (29 April 2017)
0100 0400 0700 1000 1300 1600 1900 2200
Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Light rain
Temperature (°C)
1 0 2 4 7 7 6 4
Feels like temperature (°C) arrow down
-3 -4 -2 0 3 3 2 0
Precipitation probability arrow down
10% 10% 20% 20% 10% 20% 20% 40%
Wind direction, speed & gust (mph) arrow down
ENE 11 15 ESE 11 17 ESE 12 19 SE 14 25 SE 15 29 SE 15 29 ESE 14 25 ESE 15 25
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor) arrow down
VG G G VG VG G G G
Humidity arrow down
94% 93% 91% 80% 69% 74% 76% 87%
UV index arrow down
0 0 1 3 4 2 1 0
Sunday   (30 April 2017)
0100 0400 0700 1000 1300 1600 1900 2200
Cloudy Cloudy Cloudy Cloudy Cloudy Light shower day Light shower day Cloudy
Temperature (°C)
4 4 4 6 7 7 6 5
Feels like temperature (°C) arrow down
-1 -1 0 1 4 4 3 1
Precipitation probability arrow down
10% 10% 10% 10% 10% 30% 40% 20%
Wind direction, speed & gust (mph) arrow down
E 15 26 E 15 26 E 15 27 ESE 15 29 ESE 15 30 SE 13 26 SE 11 21 SSE 11 18
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor) arrow down
G G G G G M M VG
Humidity arrow down
88% 88% 88% 84% 77% 80% 86% 92%
UV index arrow down
0 0 1 2 4 2 1 0
More Detail chevron down

Issued at: 1100 on Mon 24 Apr 2017

Forecast summary

Regional forecast for Wales

Becoming colder with wintry showers.

Today:

Mainly cloudy with some outbreaks of light rain. The cloud and rain slowly clearing southwards through the day with drier, brighter but noticeably colder conditions following from the north. Maximum Temperature 13 °C.

Tonight:

Remaining cloud clearing to leave a cold night with clear spells and a widespread frost. The odd wintry shower is also possible in the north and west. Minimum Temperature -1 °C.

Tuesday:

Brisk northerly winds adding to the cold feel on Tuesday. There will be a mix of sunny spells and scattered wintry showers with a risk of hail and thunder too. Maximum Temperature 11 °C.

Outlook for Wednesday to Friday:

Wednesday will feel cold with sunshine and further showers, perhaps wintry. Thursday and Friday will feel less cold with fewer showers and some bright spells. Overnight frosts becoming less widespread.

Updated at: 0401 on Mon 24 Apr 2017

UK forecast for the next 5 days

Becoming much colder with wintry showers.

Today:

Dry with sunny spells in the south but outbreaks of rain over central areas will move south followed by colder conditions. Windy with wintry showers for the north-west, more persistent for a time, with snow possibly to low levels.

Tonight:

Clear spells and wintry showers spreading down the east and west coasts. Widespread frost inland and staying windy in the north.

Tuesday:

Sunny spells and scattered wintry showers, with a risk of hail and thunder and snow over the hills in the north, at least. Breezy everywhere with gales in the north.

Outlook for Wednesday to Friday:

Sunshine and further showers on Wednesday, some wintry. Patchy rain moving south-eastwards on Thursday, then mainly dry on Friday. Becoming less cold with frost less widespread.

Updated at: 0355 on Mon 24 Apr 2017

Outlook for the UK over the next 6-30 days

UK Outlook for Saturday 29 Apr 2017 to Monday 8 May 2017:

Saturday is likely to be mainly dry and bright with temperatures less cold than recently, though it will still be rather cool for the time of year. However, rain is likely overnight in the far north and west and this may well spread across the rest of the UK on Sunday, with the best chance of drier weather in the east. There may be some further rain around on Bank Holiday Monday, but also some drier and brighter spells. As we move into the first week of May, we're expecting more settled weather to become established, with temperatures rising significantly giving us a warm week, perhaps very warm in some parts. The dry and settled weather is likely to last to the end of this period.

Updated at: 1309 on Mon 24 Apr 2017

UK Outlook for Tuesday 9 May 2017 to Tuesday 23 May 2017:

High pressure appears more likely to be dominant in the second week of May meaning that below average rainfall is most probable during this time. However, there is a chance of less settled conditions at times, especially across southern and southwestern areas. Temperatures are likely to be above average for the time of year with a chance of some very warm weather at times, with limited risk of frost. The forecast for the third week is less certain, though on balance, we might expect these settled and warmer than average conditions to continue.

Updated at: 1313 on Mon 24 Apr 2017