Daily Report for 6th February 2021

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 3.5 °C (+1.1) 23:55 4.1 °C (+1.7) 9.7 °C (+7.3), 2011 -0.8 °C (-3.2), 2018
Maximum Temperature 7.6 °C (+0.2) 13:56 8.9 °C (+1.6) 12.2 °C (+4.8), 2016 1.1 °C (-6.3), 2009
Mean Temperature 6.2 °C (+0.7) 7.0 °C (+1.7) 10.8 °C, 2011 0.7 °C, 2009
Minimum Humidity 84% 13:22 82% 90%, 2010 54%, 2015
Maximum Humidity 95% 07:37 96% 98%, 2009 84%, 2011
Mean Humidity 91% 90% 96%, 2010 72%, 2015
Minimum Pressure 1005 hPa 20:32 1000 hPa 1030 hPa, 2012 980 hPa, 2014
Maximum Pressure 1010 hPa 00:04 1007 hPa 1036 hPa, 2012 992 hPa, 2009
Mean Pressure 1008 hPa 1003 hPa 1033 hPa, 2012 989 hPa, 2014
Mean Wind Speed 2.6 mph (-2.5) 3.4 mph (-1.7) 12.4 mph, 2016 0.9 mph, 2012
Maximum Wind Speed 12.3 mph 23:42 12.2 mph 25.9 mph, 2016 5.9 mph, 2012
Maximum Gust 19.4 mph 21:47 18.1 mph 37.1 mph, 2016 7.4 mph, 2012
Mean Wind Direction ENE
Rainfall 6.0 mm 25.8 mm (294%) 7.9 mm, 2014
Maximum Hourly Rain 2.4 mm 21:42 2.4 mm, 2014
Maximum 10-min Rain 1.0 mm 17:05 1.0 mm, 2021
Maximum Rain Rate 14 mm/h 16:56 20 mm/h, 2016
Minimum Dew Point 2.5 °C 23:55 2.8 °C 6.4 °C, 2019 -4.5 °C, 2018
Maximum Dew Point 5.9 °C 00:36 6.9 °C 9.4 °C, 2014 -1.5 °C, 2015
Mean Dew Point 4.8 °C 5.4 °C 7.7 °C, 2019 -2.8 °C, 2015
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 5.3 °C * 06:47 4.9 °C 10.3 °C, 2011 -0.1 °C, 2015
Day Maximum (09-21) 7.6 °C 13:57 8.8 °C 12.2 °C, 2016 1.1 °C, 2009
Max 10m Temp Rise 0.4 °C 10:19 0.4 °C 0.8 °C, 2014 0.2 °C, 2009
Max 1hr Temp Rise 1.2 °C 10:40 1.5 °C 2.5 °C, 2014 0.3 °C, 2009
Max 1hr Hum Rise 6% 17:24 5% 13%, 2016 3%, 2009
Max 10m Temp Fall 0.4 °C 20:53 0.3 °C 1.2 °C, 2016 0.2 °C, 2011
Max 1hr Temp Fall 1.2 °C 21:03 1.0 °C 2.6 °C, 2016 0.5 °C, 2019
Max 1hr Hum Fall 5% 11:15 6% 13%, 2013 1%, 2014
Max 10m Wind Speed 10.2 mph 20:34 9.2 mph 20.5 mph, 2016 3.8 mph, 2012
Minimum Feels-like -1.9 °C 23:42 0.5 °C 6.3 °C, 2011 -5.9 °C, 2015
Maximum Feels-like 7.5 °C 13:42 9.1 °C 12.2 °C, 2016 1.1 °C, 2018
Mean Feels-like 4.8 °C 5.8 °C 10.8 °C, 2011 -2.5 °C, 2015
Air-frost Hrs 0 hrs 0 hrs 4 hrs, 2018 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 4.1 °C (-0.9) 4.8 °C (-0.1) 7.7 °C (+2.7), 2017 0.8 °C (-4.2), 2009
Humidity Range 11% 14% 32%, 2014 8%, 2010
Pressure Range 4 hPa 7 hPa 24 hPa, 2013 1 hPa, 2011
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0.5 [6%]1.5 hrs (10%) [3%] 7.5 [89%], 2020 0 [0%], 2009
Wet Hours 7
[Mean rain rate: 0.9 mm/h]
23 hrs (206%) [16%] 11, 2014 , 2009
Cloud Cover am: Mostly Cloudy
pm: Overcast
Events None
Comments eve rn turned to snow late
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 4.5 °C
Notes
Times of extremes are computed using the midpoint of the longest continuous period at that extreme value.
Cumulative anomalies are reported according to the expected value for the month-to-date rather than month-end.
Sun hrs are initially pulled from the official weather station at Heathrow, and later adjusted by hand to reflect local conditions based on webcam observations. Wet hrs are dervied algorithmically from rainfall data, though may be adjusted manually. Cloud cover and Events are manually reported, often with multi-week delays.
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Daily Graph of Conditions

day graph

Webcam Summary of Cloud Conditions

daycamsumFull resolution individual images at up-to 5 minute intervals

Wind rose