Daily Report for 1st July 2020

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 14.8 °C (+1.5) 06:08 14.8 °C (+1.5) 19.5 °C (+6.2), 2015 10.3 °C (-3.0), 2011
Maximum Temperature 20.2 °C (-2.1) 11:35 20.2 °C (-2.2) 34.2 °C (+11.9), 2015 19.0 °C (-3.3), 2012
Mean Temperature 17.6 °C (-0.3) 17.6 °C (-0.4) 27.2 °C, 2015 15.7 °C, 2012
Minimum Humidity 64% 11:33 64% 64%, 2020 28%, 2015
Maximum Humidity 86% 23:47 86% 93%, 2023 65%, 2015
Mean Humidity 77% 77% 77%, 2020 44%, 2015
Minimum Pressure 1005 hPa 04:42 1005 hPa 1023 hPa, 2011 1005 hPa, 2020
Maximum Pressure 1009 hPa 23:55 1009 hPa 1027 hPa, 2011 1009 hPa, 2020
Mean Pressure 1007 hPa 1007 hPa 1025 hPa, 2011 1007 hPa, 2020
Mean Wind Speed 6.9 mph (+2.6) 6.9 mph (+2.6) 10.6 mph, 2016 1.4 mph, 2021
Maximum Wind Speed 15.4 mph 15:44 15.4 mph 20.5 mph, 2016 8.5 mph, 2011
Maximum Gust 26.5 mph 13:10 26.5 mph 35.5 mph, 2016 12.1 mph, 2011
Mean Wind Direction WSW
Rainfall 1.3 mm 1.3 mm (88%) 1.3 mm, 2020
Maximum Hourly Rain 0.4 mm 20:40 0.5 mm, 2016
Maximum 10-min Rain 0.3 mm 15:02 0.3 mm, 2020
Maximum Rain Rate 0.4 mm/h 20:40 0.4 mm/h, 2016
Minimum Dew Point 11.9 °C 06:47 11.9 °C 12.2 °C, 2009 4.3 °C, 2011
Maximum Dew Point 15.5 °C 14:19 15.5 °C 17.1 °C, 2009 8.4 °C, 2011
Mean Dew Point 13.5 °C 13.5 °C 14.3 °C, 2009 5.8 °C, 2011
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 14.8 °C 06:09 14.8 °C 19.5 °C, 2015 10.3 °C, 2011
Day Maximum (09-21) 20.2 °C 11:35 20.2 °C 34.2 °C, 2015 19.0 °C, 2012
Max 10m Temp Rise 0.8 °C 10:39 0.8 °C 1.0 °C, 2009 0.5 °C, 2011
Max 1hr Temp Rise 2.3 °C 07:47 2.3 °C 4.4 °C, 2009 1.5 °C, 2013
Max 1hr Hum Rise 12% 12:26 12% 14%, 2022 5%, 2010
Max 10m Temp Fall 0.8 °C 13:23 0.8 °C 0.8 °C, 2012 0.4 °C, 2010
Max 1hr Temp Fall 1.7 °C 20:48 1.7 °C 3.0 °C, 2021 1.2 °C, 2012
Max 1hr Hum Fall 9% 07:55 9% 16%, 2016 7%, 2010
Max 10m Wind Speed 11.8 mph 15:50 11.8 mph 16.6 mph, 2016 5.3 mph, 2011
Minimum Feels-like 17.0 °C 06:46 17.0 °C 21.9 °C, 2015 10.3 °C, 2011
Maximum Feels-like 23.8 °C 13:59 23.8 °C 37.3 °C, 2015 19.2 °C, 2012
Mean Feels-like 20.7 °C 20.7 °C 30.2 °C, 2015 16.1 °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 5.4 °C (-3.7) 5.4 °C (-3.7) 14.7 °C (+5.6), 2015 5.4 °C (-3.7), 2020
Humidity Range 22% 22% 49%, 2014 22%, 2020
Pressure Range 4 hPa 4 hPa 8 hPa, 2012 2 hPa, 2018
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 3 [20%]3 hrs (46%) [20%] 12 [80%], 2018 2 [13%], 2023
Wet Hours 2
[Mean rain rate: 0.7 mm/h]		2 hrs (182%) [8.3%] 2, 2016 0, 2009
Cloud Cover Mostly Cloudy with periods of Partly Cloudy
Events None
Comments Showers
Extra Comments
Issues no pond temp - ponds still closed!
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 5.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 1st July 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