Daily Report for 28th March 2020

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 4.3 °C (-0.9) 23:24 4.3 °C (-0.1) 8.7 °C (+3.5), 2021 -1.2 °C (-6.4), 2013
Maximum Temperature 10.7 °C (-1.7) 11:49 11.2 °C (+0.2) 20.8 °C (+8.4), 2012 4.0 °C (-8.4), 2013
Mean Temperature 6.8 °C (-1.3) 7.6 °C (+0.0) 12.5 °C, 2012 1.7 °C, 2013
Minimum Humidity 56% 16:51 59% 78%, 2021 27%, 2012
Maximum Humidity 82% 06:06 88% 98%, 2014 61%, 2012
Mean Humidity 71% 76% 86%, 2018 43%, 2012
Minimum Pressure 1026 hPa 00:01 1012 hPa 1034 hPa, 2019 974 hPa, 2016
Maximum Pressure 1036 hPa 23:56 1019 hPa 1038 hPa, 2019 984 hPa, 2024
Mean Pressure 1030 hPa 1016 hPa 1036 hPa, 2019 979 hPa, 2024
Mean Wind Speed 9.2 mph (+4.0) 7.0 mph (+1.8) 12.2 mph, 2021 0.5 mph, 2022
Maximum Wind Speed 21.1 mph 18:43 16.8 mph 26.4 mph, 2024 4.0 mph, 2017
Maximum Gust 30.0 mph 18:44 25.8 mph 44.9 mph, 2016 7.3 mph, 2017
Mean Wind Direction NE
Rainfall trace 39.1 mm (111%) 12.1, 2024
Maximum Hourly Rain n/a 4.8, 2024
Maximum 10-min Rain n/a 1.2, 2024
Maximum Rain Rate n/a 18, 2016
Minimum Dew Point -1.0 °C 19:43 0.8 °C 5.5 °C, 2021 -7.5 °C, 2013
Maximum Dew Point 4.6 °C 11:48 5.6 °C 10.8 °C, 2015 -1.4 °C, 2013
Mean Dew Point 1.9 °C 3.4 °C 7.8 °C, 2015 -4.9 °C, 2013
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 4.4 °C * 04:06 4.5 °C 9.6 °C, 2025 -1.2 °C, 2013
Day Maximum (09-21) 10.7 °C 11:50 11.2 °C 20.8 °C, 2012 4.0 °C, 2013
Max 10m Temp Rise 0.6 °C 10:02 0.5 °C 1.2 °C, 2012 0.2 °C, 2021
Max 1hr Temp Rise 1.9 °C 10:03 1.8 °C 6.3 °C, 2012 0.7 °C, 2021
Max 1hr Hum Rise 11% 18:44 10% 20%, 2016 2%, 2021
Max 10m Temp Fall 0.6 °C 12:10 0.6 °C 1.4 °C, 2009 0.2 °C, 2014
Max 1hr Temp Fall 1.8 °C 12:50 1.7 °C 3.6 °C, 2009 0.5 °C, 2023
Max 1hr Hum Fall 11% 10:33 10% 30%, 2014 3%, 2021
Max 10m Wind Speed 14.4 mph 10:46 12.5 mph 20.5 mph, 2024 3.0 mph, 2022
Minimum Feels-like -1.3 °C 23:33 0.4 °C 5.7 °C, 2019 -6.8 °C, 2013
Maximum Feels-like 10.7 °C 11:48 10.9 °C 20.8 °C, 2012 1.7 °C, 2013
Mean Feels-like 3.4 °C 5.6 °C 12.5 °C, 2012 -2.2 °C, 2013
Air-frost Hrs 0 hrs 0 hrs 7 hrs, 2013 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 6.4 °C (-0.9) 6.9 °C (+0.3) 17.5 °C (+10.2), 2012 3.1 °C (-4.2), 2023
Humidity Range 26% 29% 54%, 2014 5%, 2021
Pressure Range 10 hPa 7 hPa 23 hPa, 2016 2 hPa, 2017
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 5 [44%]139 hrs (136%) [47%] 11.42 [100%], 2012 0 [0%], 2015
Wet Hours 0.346 hrs (96%) [6.8%] 10, 2018 , 2009
Cloud Cover am: Sunny transitioned to Overcast
pm: Partly Cloudy
Events None
Comments 1830 brief Shower
Extra Comments
Issues no pond temp due to covid
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 28th March 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

daycamsumFull resolution individual images at up-to 5 minute intervals

Wind rose