Daily Report for 1st June 2017

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 13.0 °C (+2.1) 03:56 13.0 °C (+2.1) 15.7 °C (+4.8), 2018 8.0 °C (-2.9), 2011
Maximum Temperature 25.7 °C (+6.3) 16:27 25.7 °C (+6.2) 27.4 °C (+8.0), 2019 13.3 °C (-6.1), 2016
Mean Temperature 20.2 °C (+4.2) 20.2 °C (+4.1) 20.5 °C, 2019 11.7 °C, 2015
Minimum Humidity 41% 16:39 41% 88%, 2016 31%, 2021
Maximum Humidity 82% 05:16 82% 94%, 2010 75%, 2011
Mean Humidity 59% 59% 90%, 2016 58%, 2011
Minimum Pressure 1018 hPa 00:03 1018 hPa 1027 hPa, 2011 1005 hPa, 2015
Maximum Pressure 1023 hPa 06:48 1023 hPa 1032 hPa, 2011 1015 hPa, 2015
Mean Pressure 1021 hPa 1021 hPa 1030 hPa, 2011 1012 hPa, 2015
Mean Wind Speed 3.1 mph (-1.3) 3.1 mph (-1.3) 8.5 mph, 2015 1.6 mph, 2022
Maximum Wind Speed 8.7 mph 12:10 8.7 mph 22.1 mph, 2015 7.8 mph, 2012
Maximum Gust 12.6 mph 12:10 12.6 mph 29.7 mph, 2015 10.9 mph, 2012
Mean Wind Direction SW
Rainfall 0.0 mm 0.0 mm (0%) 5.5 mm, 2010
Maximum Hourly Rain n/a 1.4, 2010
Maximum 10-min Rain n/a 0.3, 2010
Maximum Rain Rate n/a 2, 2010
Minimum Dew Point 9.4 °C 03:54 9.4 °C 14.5 °C, 2018 2.3 °C, 2011
Maximum Dew Point 13.4 °C 08:16 13.4 °C 17.0 °C, 2018 7.5 °C, 2015
Mean Dew Point 11.3 °C 11.3 °C 15.6 °C, 2018 4.1 °C, 2015
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 13.0 °C 03:56 13.0 °C 15.7 °C, 2018 8.0 °C, 2011
Day Maximum (09-21) 25.7 °C 16:27 25.7 °C 26.4 °C, 2019 13.3 °C, 2016
Max 10m Temp Rise 0.6 °C 12:53 0.6 °C 0.9 °C, 2009 0.2 °C, 2010
Max 1hr Temp Rise 2.3 °C 07:46 2.3 °C 4.2 °C, 2011 0.5 °C, 2016
Max 1hr Hum Rise 6% 01:01 6% 17%, 2022 2%, 2016
Max 10m Temp Fall 0.4 °C 17:02 0.4 °C 0.9 °C, 2022 0.2 °C, 2010
Max 1hr Temp Fall 1.5 °C 02:40 1.5 °C 3.4 °C, 2022 0.6 °C, 2016
Max 1hr Hum Fall 10% 11:00 10% 20%, 2021 1%, 2016
Max 10m Wind Speed 6.7 mph 12:00 6.7 mph 16.8 mph, 2015 5.7 mph, 2012
Minimum Feels-like 14.0 °C 03:54 14.0 °C 19.4 °C, 2018 5.2 °C, 2015
Maximum Feels-like 27.7 °C 16:27 27.7 °C 30.0 °C, 2019 15.3 °C, 2016
Mean Feels-like 22.1 °C 22.1 °C 23.3 °C, 2018 11.1 °C, 2015
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 12.7 °C (+4.2) 12.7 °C (+4.1) 15.5 °C (+7.0), 2019 2.1 °C (-6.4), 2016
Humidity Range 41% 41% 53%, 2021 3%, 2016
Pressure Range 5 hPa 5 hPa 10 hPa, 2015 1 hPa, 2012
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 12 [81%]12 hrs (189%) [81%] 14.8 [100%], 2020 0 [0%], 2010
Wet Hours 00 hrs (0%) [0%] 6, 2010 0, 2009
Cloud Cover am: Sunny transitioned to Mostly Sunny
pm: Mostly Sunny
Events None
Comments -
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 1st June 2017.
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

daycamsumLarge resolution version

Wind rose