Daily Report for 2nd June 2017

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 13.0 °C (+2.1) 05:06 13.0 °C (+2.0) 15.1 °C (+4.2), 2019 8.1 °C (-2.8), 2022
Maximum Temperature 25.0 °C (+5.5) 13:54 25.4 °C (+5.8) 27.1 °C (+7.6), 2019 12.4 °C (-7.1), 2016
Mean Temperature 19.1 °C (+3.8) 19.7 °C (+3.9) 21.1 °C, 2019 10.8 °C, 2016
Minimum Humidity 51% 12:43 46% 79%, 2016 31%, 2009
Maximum Humidity 84% 23:53 83% 97%, 2010 73%, 2009
Mean Humidity 69% 64% 86%, 2016 50%, 2009
Minimum Pressure 1015 hPa 14:04 1016 hPa 1031 hPa, 2011 1001 hPa, 2015
Maximum Pressure 1018 hPa 04:57 1020 hPa 1034 hPa, 2011 1011 hPa, 2015
Mean Pressure 1017 hPa 1019 hPa 1033 hPa, 2011 1004 hPa, 2015
Mean Wind Speed 1.5 mph (-2.9) 2.3 mph (-2.1) 11.5 mph, 2015 1.5 mph, 2017
Maximum Wind Speed 7.7 mph 15:43 8.2 mph 22.1 mph, 2015 7.6 mph, 2022
Maximum Gust 10.5 mph 15:43 11.6 mph 34.2 mph, 2015 10.5 mph, 2017
Mean Wind Direction WNW
Rainfall 5.3 mm 5.3 mm (169%) 5.3 mm, 2017
Maximum Hourly Rain 4.3 mm 15:46 4.3 mm, 2017
Maximum 10-min Rain 4.1 mm 15:43 4.1 mm, 2017
Maximum Rain Rate 60 mm/h 15:36 60 mm/h, 2017
Minimum Dew Point 9.0 °C 04:36 9.2 °C 12.0 °C, 2018 3.0 °C, 2013
Maximum Dew Point 16.6 °C 15:52 15.0 °C 16.6 °C, 2017 7.8 °C, 2013
Mean Dew Point 13.2 °C 12.2 °C 14.0 °C, 2018 4.9 °C, 2013
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 13.0 °C 05:06 13.0 °C 15.8 °C, 2019 8.1 °C, 2022
Day Maximum (09-21) 25.0 °C 13:54 25.4 °C 27.1 °C, 2019 12.4 °C, 2016
Max 10m Temp Rise 0.8 °C 05:56 0.7 °C 1.0 °C, 2009 0.2 °C, 2016
Max 1hr Temp Rise 3.1 °C 10:15 2.7 °C 3.7 °C, 2009 0.7 °C, 2016
Max 1hr Hum Rise 12% 15:52 9% 17%, 2015 2%, 2016
Max 10m Temp Fall 0.6 °C 14:08 0.5 °C 0.9 °C, 2025 0.2 °C, 2016
Max 1hr Temp Fall 2.0 °C 01:25 1.8 °C 3.4 °C, 2020 0.7 °C, 2016
Max 1hr Hum Fall 10% 09:53 10% 16%, 2012 3%, 2016
Max 10m Wind Speed 5.4 mph 15:51 6.1 mph 16.5 mph, 2015 5.1 mph, 2020
Minimum Feels-like 13.9 °C 04:50 13.9 °C 17.9 °C, 2018 6.4 °C, 2016
Maximum Feels-like 28.7 °C 14:28 28.2 °C 30.2 °C, 2019 13.3 °C, 2016
Mean Feels-like 22.1 °C 22.1 °C 24.3 °C, 2019 11.3 °C, 2016
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 12.0 °C (+3.4) 12.4 °C (+3.8) 14.7 °C (+6.1), 2009 2.9 °C (-5.7), 2016
Humidity Range 33% 37% 54%, 2010 12%, 2016
Pressure Range 3 hPa 4 hPa 10 hPa, 2015 2 hPa, 2016
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 1 [7%]13 hrs (102%) [44%] 15 [101%], 2009 0 [0%], 2016
Wet Hours 2
[Mean rain rate: 2.6 mm/h]		2 hrs (81%) [4.2%] 5, 2012 0, 2009
Cloud Cover Hazy with periods of Mostly Cloudy
Events None
Comments Heavy pm shs
Extra Comments
Issues Rn data from N16
Observer Absent? Yes - observations may be unreliable
Pond Temperature @ Hampstead Heath 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 2nd 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

day graph

Webcam Summary of Cloud Conditions

daycamsumLarge resolution version

Wind rose