Daily Report for 16th June 2020

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 13.8 °C (+1.7) 01:03 11.0 °C (-0.6) 14.4 °C (+2.3), 2018 8.1 °C (-4.0), 2015
Maximum Temperature 24.4 °C (+3.3) 16:06 19.7 °C (-0.8) 29.1 °C (+8.0), 2022 17.3 °C (-3.8), 2011
Mean Temperature 19.5 °C (+2.5) 15.4 °C (-0.7) 22.1 °C, 2021 13.9 °C, 2010
Minimum Humidity 46% 16:10 52% 61%, 2019 33%, 2022
Maximum Humidity 90% 01:15 88% 92%, 2019 73%, 2018
Mean Humidity 66% 71% 78%, 2011 56%, 2023
Minimum Pressure 1013 hPa 19:23 1010 hPa 1027 hPa, 2025 999 hPa, 2016
Maximum Pressure 1017 hPa 00:03 1015 hPa 1030 hPa, 2025 1002 hPa, 2016
Mean Pressure 1015 hPa 1012 hPa 1029 hPa, 2025 1000 hPa, 2016
Mean Wind Speed 3.3 mph (-1.1) 4.2 mph (-0.2) 10.3 mph, 2012 1.7 mph, 2022
Maximum Wind Speed 11.2 mph 16:28 12.5 mph 23.0 mph, 2012 7.7 mph, 2016
Maximum Gust 18.4 mph 16:42 20.1 mph 35.1 mph, 2012 11.5 mph, 2016
Mean Wind Direction SSW
Rainfall 0.0 mm 12.2 mm (49%) 14.7 mm, 2011
Maximum Hourly Rain n/a 8.5, 2011
Maximum 10-min Rain n/a 1, 2021
Maximum Rain Rate n/a 7.2, 2021
Minimum Dew Point 11.5 °C 19:47 7.8 °C 11.5 °C, 2020 4.1 °C, 2010
Maximum Dew Point 15.3 °C 13:46 12.1 °C 19.7 °C, 2021 7.8 °C, 2010
Mean Dew Point 12.8 °C 9.9 °C 15.6 °C, 2021 6.1 °C, 2010
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 13.8 °C 01:04 11.2 °C 14.6 °C, 2018 8.1 °C, 2015
Day Maximum (09-21) 24.4 °C 16:07 19.7 °C 29.1 °C, 2022 17.3 °C, 2011
Max 10m Temp Rise 0.8 °C 10:31 0.6 °C 1.2 °C, 2009 0.5 °C, 2010
Max 1hr Temp Rise 2.2 °C 14:53 2.1 °C 3.9 °C, 2009 1.5 °C, 2014
Max 1hr Hum Rise 15% 17:09 11% 21%, 2021 5%, 2017
Max 10m Temp Fall 1.1 °C 16:34 0.8 °C 1.1 °C, 2020 0.4 °C, 2014
Max 1hr Temp Fall 2.9 °C 17:07 2.0 °C 3.3 °C, 2021 1.0 °C, 2014
Max 1hr Hum Fall 16% 14:47 12% 18%, 2023 8%, 2010
Max 10m Wind Speed 9.3 mph 16:31 9.2 mph 16.2 mph, 2012 5.7 mph, 2015
Minimum Feels-like 16.0 °C 00:53 11.2 °C 16.0 °C, 2020 6.9 °C, 2010
Maximum Feels-like 27.8 °C 16:27 21.5 °C 34.6 °C, 2021 18.7 °C, 2012
Mean Feels-like 22.2 °C 16.8 °C 26.5 °C, 2021 13.6 °C, 2010
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 10.6 °C (+1.6) 8.7 °C (-0.2) 17.2 °C (+8.2), 2022 5.1 °C (-3.9), 2014
Humidity Range 44% 36% 58%, 2022 23%, 2018
Pressure Range 4 hPa 6 hPa 9 hPa, 2017 2 hPa, 2014
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 10.5 [69%]87 hrs (85%) [36%] 13.5 [89%], 2023 0 [0%], 2014
Wet Hours 0.113 hrs (64%) [3.3%] 4, 2011 0, 2010
Cloud Cover am: Sunny transitioned to Partly Cloudy
pm: Partly Cloudy
Events None
Comments -
Extra Comments good convection
Issues no pond temp - ponds still closed!
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 16th 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