Daily Report for 10th April 2020

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 8.2 °C (+2.4) 06:24 6.0 °C (+0.4) 10.1 °C (+4.3), 2009 0.6 °C (-5.2), 2022
Maximum Temperature 21.8 °C (+7.9) 14:48 17.5 °C (+3.8) 21.8 °C (+7.9), 2020 7.9 °C (-6.0), 2021
Mean Temperature 14.5 °C (+5.2) 12.0 °C (+2.1) 14.5 °C, 2020 6.2 °C, 2021
Minimum Humidity 45% 16:21 45% 81%, 2018 32%, 2015
Maximum Humidity 88% 06:51 85% 96%, 2018 71%, 2017
Mean Humidity 67% 65% 92%, 2018 56%, 2017
Minimum Pressure 1024 hPa 16:51 1019 hPa 1030 hPa, 2010 986 hPa, 2012
Maximum Pressure 1027 hPa 00:29 1026 hPa 1035 hPa, 2010 993 hPa, 2012
Mean Pressure 1026 hPa 1022 hPa 1032 hPa, 2010 990 hPa, 2012
Mean Wind Speed 5.2 mph (+0.3) 4.2 mph (-0.7) 8.7 mph, 2023 2.1 mph, 2009
Maximum Wind Speed 14.7 mph 17:26 12.9 mph 20.5 mph, 2023 7.8 mph, 2010
Maximum Gust 19.6 mph 17:23 18.8 mph 33.4 mph, 2023 10.9 mph, 2014
Mean Wind Direction E
Rainfall 0.0 mm 0.2 mm (1%) 11.3 mm, 2023
Maximum Hourly Rain n/a 2, 2023
Maximum 10-min Rain n/a 0.9, 2023
Maximum Rain Rate n/a 14.4, 2023
Minimum Dew Point 5.8 °C 00:17 2.5 °C 7.7 °C, 2009 -2.4 °C, 2016
Maximum Dew Point 11.0 °C 14:25 8.1 °C 11.3 °C, 2023 3.8 °C, 2021
Mean Dew Point 8.0 °C 5.2 °C 9.3 °C, 2009 0.8 °C, 2016
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 8.2 °C 06:28 6.5 °C 10.9 °C, 2009 0.6 °C, 2022
Day Maximum (09-21) 21.8 °C 14:44 17.5 °C 21.8 °C, 2020 7.9 °C, 2021
Max 10m Temp Rise 0.7 °C 10:57 0.8 °C 1.1 °C, 2022 0.3 °C, 2021
Max 1hr Temp Rise 3.3 °C 09:27 3.2 °C 4.5 °C, 2022 0.7 °C, 2021
Max 1hr Hum Rise 7% 20:20 9% 16%, 2023 3%, 2017
Max 10m Temp Fall 0.5 °C 19:42 0.5 °C 1.7 °C, 2012 0.4 °C, 2010
Max 1hr Temp Fall 1.8 °C 19:52 1.8 °C 3.3 °C, 2012 1.3 °C, 2014
Max 1hr Hum Fall 12% 09:34 13% 21%, 2016 6%, 2017
Max 10m Wind Speed 11.3 mph 17:26 9.5 mph 15.4 mph, 2023 5.5 mph, 2014
Minimum Feels-like 6.1 °C 06:37 4.6 °C 6.1 °C, 2020 -1.2 °C, 2013
Maximum Feels-like 23.4 °C 14:30 17.9 °C 23.4 °C, 2020 7.0 °C, 2021
Mean Feels-like 14.7 °C 11.9 °C 14.7 °C, 2020 4.3 °C, 2021
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 13.6 °C (+5.4) 11.4 °C (+3.4) 15.2 °C (+7.0), 2015 3.8 °C (-4.4), 2009
Humidity Range 43% 41% 57%, 2012 15%, 2018
Pressure Range 3 hPa 6 hPa 11 hPa, 2015 1 hPa, 2011
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 12 [98%]72 hrs (140%) [60%] 12 [98%], 2019 0 [0%], 2021
Wet Hours 00.5 hrs (3%) [0.2%] 11, 2023 0, 2010
Cloud Cover Sunny
Events Maximum possible sunshine
Comments -
Extra Comments
Issues no pond temp due to dumb lockdown
Observer Absent? Yes - observations may be unreliable
Pond Temperature @ Hampstead Heath 5.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 10th April 2020.
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 derived based on analysis of webcam observations, but may use data from our closest site, Heathrow, when needed.
Wet hrs are dervied algorithmically from rainfall data, though may be adjusted manually.
Rainfall totals may be manually adjusted after the fact to correct delayed or erroneous data.
Cloud cover and Events are manually reported, often with multi-week delays.
Data is generally reliable and accurate but should always be viewed with some quantity of salt to hand.
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Daily Graph of Conditions

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Webcam Summary of Cloud Conditions

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Wind rose