Daily Report for 28th February 2021

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 2.2 °C (-0.4) 08:35 3.4 °C (+1.1) 10.0 °C (+7.4), 2012 -5.4 °C (-8.0), 2018
Maximum Temperature 9.0 °C (+0.2) 16:53 8.4 °C (+0.8) 14.2 °C (+5.4), 2012 -1.8 °C (-10.6), 2018
Mean Temperature 4.9 °C (-0.1) 6.1 °C (+1.0) 11.4 °C, 2012 -4.1 °C, 2018
Minimum Humidity 76% 17:05 72% 84%, 2011 42%, 2016
Maximum Humidity 96% 09:55 90% 98%, 2010 76%, 2016
Mean Humidity 88% 82% 90%, 2010 63%, 2016
Minimum Pressure 1035 hPa 21:55 1013 hPa 1035 hPa, 2021 979 hPa, 2010
Maximum Pressure 1041 hPa 00:08 1019 hPa 1041 hPa, 2021 993 hPa, 2017
Mean Pressure 1038 hPa 1016 hPa 1038 hPa, 2021 988 hPa, 2017
Mean Wind Speed 1.6 mph (-3.5) 5.5 mph (+0.4) 9.4 mph, 2015 1.6 mph, 2021
Maximum Wind Speed 8.2 mph 14:50 14.1 mph 19.2 mph, 2020 8.2 mph, 2021
Maximum Gust 11.4 mph 14:10 21.5 mph 30.0 mph, 2018 10.9 mph, 2012
Mean Wind Direction NE
Rainfall 0.0 mm 40.3 mm (98%) 12.6 mm, 2010
Maximum Hourly Rain n/a 3.5, 2019
Maximum 10-min Rain n/a 0.9, 2019
Maximum Rain Rate n/a 18, 2020
Minimum Dew Point 1.4 °C 07:23 1.0 °C 7.6 °C, 2012 -9.3 °C, 2018
Maximum Dew Point 5.5 °C 16:24 5.1 °C 10.0 °C, 2012 -5.0 °C, 2018
Mean Dew Point 3.0 °C 3.2 °C 8.7 °C, 2012 -6.8 °C, 2018
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 2.2 °C 08:36 4.0 °C 10.0 °C, 2012 -4.9 °C, 2018
Day Maximum (09-21) 9.0 °C 16:54 8.2 °C 14.2 °C, 2012 -1.8 °C, 2018
Max 10m Temp Rise 0.4 °C 13:22 0.4 °C 0.6 °C, 2018 0.2 °C, 2010
Max 1hr Temp Rise 1.3 °C 12:39 1.3 °C 2.1 °C, 2020 0.5 °C, 2011
Max 1hr Hum Rise 4% 18:12 6% 21%, 2018 4%, 2010
Max 10m Temp Fall 0.3 °C 19:41 0.3 °C 0.8 °C, 2018 0.1 °C, 2015
Max 1hr Temp Fall 1.2 °C 19:48 1.0 °C 2.1 °C, 2018 0.4 °C, 2015
Max 1hr Hum Fall 5% 12:59 7% 24%, 2018 4%, 2015
Max 10m Wind Speed 5.4 mph 15:12 11.1 mph 14.6 mph, 2020 5.4 mph, 2021
Minimum Feels-like -1.3 °C 08:38 -0.5 °C 8.5 °C, 2012 -14.6 °C, 2018
Maximum Feels-like 9.0 °C 16:44 8.2 °C 15.5 °C, 2012 -4.3 °C, 2018
Mean Feels-like 3.9 °C 4.1 °C 12.0 °C, 2012 -9.6 °C, 2018
Air-frost Hrs 0 hrs 5 hrs 24 hrs, 2018 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 6.8 °C (+0.6) 5.0 °C (-0.4) 9.7 °C (+3.5), 2020 1.7 °C (-4.5), 2011
Humidity Range 20% 18% 34%, 2016 6%, 2011
Pressure Range 6 hPa 6 hPa 25 hPa, 2010 3 hPa, 2012
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 5 [52%]55 hrs (73%) [22%] 5 [52%], 2021 0 [0%], 2011
Wet Hours 057 hrs (110%) [8.5%] 11, 2010 , 2009
Cloud Cover unknown
Events None
Comments blr
Extra Comments
Issues None known
Observer Absent? No
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

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Webcam Summary of Cloud Conditions

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Wind rose