Daily Report for 4th June 2020

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 10.0 °C (-1.2) 04:53 11.1 °C (-0.0) 13.4 °C (+2.2), 2018 6.2 °C (-5.0), 2012
Maximum Temperature 16.0 °C (-3.9) 13:25 21.0 °C (+1.2) 27.8 °C (+7.9), 2010 14.2 °C (-5.7), 2012
Mean Temperature 12.6 °C (-2.5) 16.2 °C (+0.6) 18.3 °C, 2011 10.1 °C, 2012
Minimum Humidity 51% 13:27 44% 82%, 2016 27%, 2015
Maximum Humidity 89% 01:15 86% 98%, 2012 72%, 2017
Mean Humidity 73% 66% 87%, 2016 51%, 2015
Minimum Pressure 1001 hPa 23:56 1011 hPa 1024 hPa, 2023 1001 hPa, 2020
Maximum Pressure 1008 hPa 00:01 1018 hPa 1031 hPa, 2013 1008 hPa, 2020
Mean Pressure 1004 hPa 1014 hPa 1027 hPa, 2013 1004 hPa, 2020
Mean Wind Speed 5.1 mph (+0.7) 3.6 mph (-0.8) 6.8 mph, 2022 1.7 mph, 2021
Maximum Wind Speed 12.2 mph 09:04 11.2 mph 19.7 mph, 2014 7.8 mph, 2016
Maximum Gust 19.6 mph 00:26 19.9 mph 29.4 mph, 2014 10.5 mph, 2016
Mean Wind Direction NNW
Rainfall 0.0 mm 0.1 mm (2%) 8.9 mm, 2012
Maximum Hourly Rain n/a 3, 2014
Maximum 10-min Rain n/a 1.3, 2014
Maximum Rain Rate n/a 24, 2014
Minimum Dew Point 5.2 °C 12:53 6.8 °C 11.3 °C, 2018 1.6 °C, 2013
Maximum Dew Point 9.5 °C 00:01 11.5 °C 15.7 °C, 2016 6.4 °C, 2009
Mean Dew Point 7.6 °C 9.2 °C 13.3 °C, 2018 4.6 °C, 2013
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 10.0 °C 04:56 11.3 °C 14.6 °C, 2018 6.6 °C, 2009
Day Maximum (09-21) 16.0 °C 13:25 21.0 °C 27.8 °C, 2010 14.2 °C, 2012
Max 10m Temp Rise 0.5 °C 11:17 0.6 °C 1.0 °C, 2015 0.4 °C, 2014
Max 1hr Temp Rise 1.4 °C 12:04 2.1 °C 4.5 °C, 2015 1.2 °C, 2014
Max 1hr Hum Rise 7% 16:43 9% 21%, 2014 3%, 2016
Max 10m Temp Fall 0.4 °C 13:59 0.5 °C 1.6 °C, 2024 0.3 °C, 2016
Max 1hr Temp Fall 1.7 °C 17:05 1.9 °C 4.3 °C, 2014 1.0 °C, 2018
Max 1hr Hum Fall 13% 10:48 12% 18%, 2014 2%, 2021
Max 10m Wind Speed 9.0 mph 00:42 7.6 mph 14.5 mph, 2014 6.0 mph, 2021
Minimum Feels-like 10.2 °C 04:57 11.7 °C 15.3 °C, 2018 2.6 °C, 2012
Maximum Feels-like 16.0 °C 13:25 22.2 °C 30.6 °C, 2010 14.2 °C, 2012
Mean Feels-like 12.9 °C 17.2 °C 20.0 °C, 2011 9.1 °C, 2012
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 6.0 °C (-2.7) 9.9 °C (+1.3) 18.1 °C (+9.4), 2010 3.2 °C (-5.5), 2021
Humidity Range 38% 42% 51%, 2015 9%, 2016
Pressure Range 7 hPa 6 hPa 12 hPa, 2019 2 hPa, 2025
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 1.1 [7%]30 hrs (117%) [50%] 15 [101%], 2010 0 [0%], 2016
Wet Hours 01 hrs (20%) [1%] 8, 2021 0, 2009
Cloud Cover Overcast with periods of Mostly Cloudy
Events None
Comments -
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 4th June 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