Daily Report for 14th April 2020

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 3.9 °C (-2.0) 06:46 6.3 °C (+0.6) 11.3 °C (+5.4), 2013 -0.7 °C (-6.6), 2019
Maximum Temperature 12.4 °C (-1.8) 16:15 17.8 °C (+4.0) 21.8 °C (+7.6), 2015 10.2 °C (-4.0), 2019
Mean Temperature 7.8 °C (-1.9) 12.1 °C (+2.3) 14.9 °C, 2013 5.0 °C, 2019
Minimum Humidity 47% 15:20 43% 71%, 2023 35%, 2015
Maximum Humidity 73% 23:56 84% 98%, 2013 73%, 2011
Mean Humidity 60% 64% 84%, 2023 56%, 2014
Minimum Pressure 1027 hPa 19:07 1019 hPa 1033 hPa, 2021 1001 hPa, 2025
Maximum Pressure 1031 hPa 09:13 1026 hPa 1035 hPa, 2021 1009 hPa, 2025
Mean Pressure 1029 hPa 1023 hPa 1034 hPa, 2021 1006 hPa, 2016
Mean Wind Speed 4.3 mph (-0.6) 4.4 mph (-0.5) 9.7 mph, 2013 1.0 mph, 2022
Maximum Wind Speed 11.4 mph 10:31 13.2 mph 20.6 mph, 2013 6.8 mph, 2022
Maximum Gust 15.0 mph 00:41 19.2 mph 29.3 mph, 2013 10.3 mph, 2022
Mean Wind Direction E
Rainfall 0.0 mm 0.3 mm (2%) 5.3 mm, 2023
Maximum Hourly Rain n/a 2.7, 2023
Maximum 10-min Rain n/a 2, 2016
Maximum Rain Rate n/a 16.4, 2009
Minimum Dew Point -1.5 °C 00:24 2.5 °C 7.2 °C, 2018 -3.0 °C, 2019
Maximum Dew Point 2.7 °C 17:11 8.1 °C 11.5 °C, 2009 1.9 °C, 2019
Mean Dew Point 0.5 °C 5.1 °C 9.5 °C, 2022 -0.3 °C, 2019
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 3.9 °C 06:46 6.8 °C 10.9 °C, 2013 -0.7 °C, 2019
Day Maximum (09-21) 12.4 °C 16:29 17.7 °C 21.8 °C, 2015 10.2 °C, 2019
Max 10m Temp Rise 0.6 °C 11:00 0.8 °C 0.8 °C, 2016 0.4 °C, 2011
Max 1hr Temp Rise 1.9 °C 11:29 3.1 °C 3.9 °C, 2019 1.6 °C, 2014
Max 1hr Hum Rise 5% 17:12 9% 16%, 2014 4%, 2011
Max 10m Temp Fall 0.4 °C 19:24 0.6 °C 0.7 °C, 2016 0.3 °C, 2010
Max 1hr Temp Fall 1.6 °C 20:12 2.1 °C 1.9 °C, 2015 1.0 °C, 2025
Max 1hr Hum Fall 8% 08:08 12% 17%, 2012 3%, 2017
Max 10m Wind Speed 7.4 mph 08:20 9.7 mph 16.2 mph, 2013 4.6 mph, 2022
Minimum Feels-like 0.5 °C 00:41 4.7 °C 12.5 °C, 2013 -3.2 °C, 2019
Maximum Feels-like 12.4 °C 16:06 18.2 °C 21.8 °C, 2015 10.2 °C, 2019
Mean Feels-like 6.3 °C 11.8 °C 15.7 °C, 2013 3.0 °C, 2019
Air-frost Hrs 0 hrs 0.3 hrs 2 hrs, 2019 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 8.5 °C (+0.2) 11.4 °C (+3.3) 14.3 °C (+6.0), 2015 6.0 °C (-2.3), 2024
Humidity Range 26% 41% 54%, 2013 19%, 2011
Pressure Range 4 hPa 7 hPa 8 hPa, 2024 1 hPa, 2009
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 11 [88%]109 hrs (150%) [64%] 12.4 [100%], 2015 0 [0%], 2011
Wet Hours 00.5 hrs (2%) [0.1%] 5, 2023 0, 2010
Cloud Cover am: Mostly Sunny transitioned to Sunny
pm: Sunny
Events None
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 14th 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