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Lake Vyrnwy SAWS (nearest observation site to Llyn Tegid)

Monday (Monday 18 September 2017)
11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 19:00 20:00 21:00 22:00 23:00
Cloudy Cloudy Cloudy Overcast Overcast Overcast Cloudy Overcast Overcast Overcast Overcast Overcast Overcast
Temperature (°C)
12.5 ° 12.8 ° 11.6 ° 12.2 ° 12.0 ° 10.8 ° 11.4 ° 11.0 ° 10.6 ° 9.5 ° 8.9 ° 9.1 ° 8.7 °
Show detail Show detail
Wind direction, speed & gust (mph) Expand
WNW 3 NW 6 NW 5 NNW 6 NNW 5 NW 5 NW 5 NNW 7 WNW 3 NW 5 W 5 WNW 3 W 6
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor) Expand
E E E G E VG E E E E E E E
Humidity Expand
77% 76% 88% 81% 88% 93% 89% 87% 87% 88% 87% 81% 84%
Pressure (hPa) Expand
1019 1019 1019 1019 1019 1019 1019 1019 1019 1020 1020 1020 1020
Pressure Tendency (F = Falling, R = Rising, S = Steady) Expand
R F S R R R F F F R R R R
Sunrise: 06:53 Sunset: 19:24 Moon phase: Waning crescent
Tuesday (Tuesday 19 September 2017)
00:00 01:00 02:00 03:00 04:00 05:00 06:00 07:00 08:00 09:00 10:00 11:00
Cloudy Overcast Cloudy Cloudy Clear night Clear night Clear night Clear night Sunny day Sunny day Sunny day Sunny intervals
Temperature (°C)
8.2 ° 8.3 ° 8.6 ° 8.5 ° 6.7 ° 7.2 ° 7.3 ° 5.9 ° 6.8 ° 9.0 ° 11.9 ° 13.0 °
Show detail Show detail
Wind direction, speed & gust (mph) Expand
SE 1 S 3 SW 3 WNW 5 NNW 7 W 3 NNW 5 NW 6 NW 5 NE 2 ENE 2 S 5
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor) Expand
E E E E E E E VG E E E E
Humidity Expand
85% 88% 86% 88% 99% 98% 97% 96% 98% 95% 83% 73%
Pressure (hPa) Expand
1021 1021 1021 1021 1021 1021 1021 1022 1022 1021 1021 1021
Pressure Tendency (F = Falling, R = Rising, S = Steady) Expand
R R R R S R R R R R R R
Sunrise: 06:54 Sunset: 19:21 Moon phase: Waning crescent

– = No Data

Issued at:

Extremes

Wales extremes

Parameter Location Value
Highest maximum temperature Porthmadog 17.3 °C
Lowest maximum temperature Lake Vyrnwy SAWS 13.5 °C
Lowest minimum temperature Swyddffynnon 1.9 °C
Highest rainfall Valley 8.0 mm
Sunniest St-Athan 5.5 hours

UK extremes

Parameter Location Value
Highest maximum temperature Wiggonholt 18.5 °C
Lowest maximum temperature Carterhouse 10.3 °C
Lowest minimum temperature Castlederg 0.3 °C
Highest rainfall Writtle 17.6 mm
Sunniest Thomastown 9.4 hours

About extremes

Highest maximum temperature - (0900 to 2100 on the date shown)

Lowest maximum temperature - (0900 to 2100 on the date shown)

Lowest minimum temperature - (2100 on the previous day to 0900 on the date shown)

Highest rainfall -(2100 on the previous day to 2100 on the date shown)

Sunniest - (2100 on the previous day to 2100 on the date shown)

The information shown is initial data as it is received; observations are subject to final quality control after publication on this website. This is particularly the case for rainfall totals during snow events.

Issued at:

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