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Northolt (nearest observation site to Harpenden)

Monday (Monday 25 September 2017)
09:00 10:00 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
Overcast Overcast Overcast Overcast Overcast Overcast Overcast Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Overcast Overcast
Temperature (°C)
15.1 ° 15.5 ° 15.8 ° 16.4 ° 16.6 ° 16.6 ° 17.4 ° 17.9 ° 17.8 ° 17.5 ° 17.0 ° 16.6 ° 16.1 ° 15.7 ° 15.4 °
Show detail Show detail
Wind direction, speed & gust (mph) Expand
ENE 5 E 6 E 5 E 8 E 6 NE 8 E 5 ENE 6 E 7 N 3 ENE 7 E 9 E 8 ENE 6 ENE 5
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor) Expand
M M M M M M M M G G M M M M M
Humidity Expand
93% 91% 91% 85% 83% 85% 86% 82% 75% 79% 79% 84% 83% 87% 88%
Pressure (hPa) Expand
1019 1019 1019 1019 1020 1020 1020 1020 1020 1020 1021 1021 1022 1022 1022
Pressure Tendency (F = Falling, R = Rising, S = Steady) Expand
R R R R R R R R F R R R R R R
Sunrise: 06:52 Sunset: 18:54 Moon phase: Waxing crescent
Tuesday (Tuesday 26 September 2017)
00:00 01:00 02:00 03:00 04:00 05:00 06:00 07:00 08:00 09:00
Overcast Partly cloudy night Cloudy Overcast Overcast Overcast Overcast Mist Mist Cloudy
Temperature (°C)
15.0 ° 13.3 ° 13.4 ° 13.9 ° 13.9 ° 13.7 ° 13.7 ° 13.3 ° 13.6 ° 14.8 °
Show detail Show detail
Wind direction, speed & gust (mph) Expand
ENE 3 N 5 WSW 2 NNE 5 NE 5 NNE 5 NNE 5 NE 2 N 3 NNE 3
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor) Expand
M M M M M M M M M M
Humidity Expand
89% 93% 95% 93% 92% 93% 93% 96% 95% 90%
Pressure (hPa) Expand
1022 1022 1022 1022 1022 1022 1022 1022 1022 1023
Pressure Tendency (F = Falling, R = Rising, S = Steady) Expand
R F F R R F F R R R
Sunrise: 06:53 Sunset: 18:51 Moon phase: Waxing crescent

– = No Data

Issued at:

Extremes

East of England extremes

Parameter Location Value
Highest maximum temperature Cavendish 20.1 °C
Lowest maximum temperature Rothamsted 17.0 °C
Lowest minimum temperature Santon Downham 10.7 °C
Highest rainfall Woburn 12.0 mm

UK extremes

Parameter Location Value
Highest maximum temperature Mumbles Head 20.5 °C
Lowest maximum temperature Braemar No2 12.6 °C
Lowest minimum temperature Katesbridge 1.3 °C
Highest rainfall Northamptonmoulton Park 26.2 mm
Sunniest Aberdaron 10.2 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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