Daily Report for 16th April 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 8.5 °C (+2.5) 06:37 5.5 °C (-0.2) 9.8 °C (+3.8), 2011 0.4 °C (-5.6), 2021
Maximum Temperature 18.0 °C (+3.7) 16:50 14.4 °C (+0.6) 19.6 °C (+5.3), 2020 8.7 °C (-5.6), 2016
Mean Temperature 12.8 °C (+3.1) 9.8 °C (+0.2) 13.6 °C, 2011 5.9 °C, 2016
Minimum Humidity 52% 16:51 52% 74%, 2009 34%, 2014
Maximum Humidity 92% 07:15 89% 95%, 2009 72%, 2011
Mean Humidity 75% 72% 89%, 2009 54%, 2014
Minimum Pressure 1030 hPa 23:55 1011 hPa 1030 hPa, 2021 998 hPa, 2016
Maximum Pressure 1032 hPa 09:10 1019 hPa 1034 hPa, 2021 1008 hPa, 2009
Mean Pressure 1031 hPa 1015 hPa 1032 hPa, 2021 1000 hPa, 2016
Mean Wind Speed 2.3 mph (-2.6) 5.1 mph (+0.2) 8.6 mph, 2013 1.5 mph, 2021
Maximum Wind Speed 8.2 mph 12:24 13.9 mph 17.8 mph, 2013 7.8 mph, 2011
Maximum Gust 14.8 mph 14:43 22.4 mph 26.5 mph, 2018 10.2 mph, 2011
Mean Wind Direction SE
Rainfall 0.0 mm 14.9 mm (67%) 6.5 mm, 2009
Maximum Hourly Rain n/a 2.8, 2009
Maximum 10-min Rain n/a 0.9, 2009
Maximum Rain Rate n/a 5.5, 2009
Minimum Dew Point 7.1 °C 06:25 2.3 °C 8.2 °C, 2009 -4.1 °C, 2012
Maximum Dew Point 10.3 °C 11:17 7.3 °C 11.3 °C, 2009 -0.9 °C, 2012
Mean Dew Point 8.2 °C 4.8 °C 9.8 °C, 2009 -2.8 °C, 2012
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 8.5 °C 06:34 5.6 °C 10.9 °C, 2009 0.4 °C, 2021
Day Maximum (09-21) 18.0 °C 16:51 14.4 °C 19.6 °C, 2020 8.5 °C, 2016
Max 10m Temp Rise 0.7 °C 10:47 0.7 °C 0.8 °C, 2021 0.4 °C, 2009
Max 1hr Temp Rise 2.8 °C 11:17 2.4 °C 3.6 °C, 2014 1.2 °C, 2009
Max 1hr Hum Rise 10% 18:50 11% 17%, 2019 4%, 2009
Max 10m Temp Fall 0.5 °C 20:01 0.8 °C 0.6 °C, 2014 0.4 °C, 2010
Max 1hr Temp Fall 2.1 °C 20:31 1.8 °C 2.3 °C, 2014 0.9 °C, 2017
Max 1hr Hum Fall 11% 11:27 11% 17%, 2012 3%, 2009
Max 10m Wind Speed 6.4 mph 14:08 10.8 mph 12.5 mph, 2013 4.5 mph, 2011
Minimum Feels-like 7.3 °C 08:24 2.9 °C 9.9 °C, 2011 -2.2 °C, 2012
Maximum Feels-like 18.7 °C 16:34 15.0 °C 19.7 °C, 2020 8.8 °C, 2016
Mean Feels-like 13.3 °C 9.3 °C 13.6 °C, 2011 4.0 °C, 2016
Air-frost Hrs 0 hrs 0.4 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 9.5 °C (+1.1) 8.9 °C (+0.9) 14.9 °C (+6.5), 2020 4.3 °C (-4.1), 2009
Humidity Range 40% 37% 50%, 2021 21%, 2009
Pressure Range 3 hPa 8 hPa 12 hPa, 2016 2 hPa, 2009
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 12 [96%]74 hrs (89%) [38%] 12.5 [100%], 2014 0 [0%], 2009
Wet Hours 016 hrs (65%) [4.2%] 5, 2009 0, 2010
Cloud Cover unknown
Events Maximum possible sunshine
Comments blr
Extra Comments
Issues None known
Observer Absent? No
Pond Temperature (Heath) 11.5 °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