Daily Report for 8th June 2011

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 9.7 °C (-1.7) 04:30 10.5 °C (-0.7) 14.3 °C (+2.9), 2022 8.7 °C (-2.7), 2009
Maximum Temperature 18.3 °C (-1.9) 13:14 20.6 °C (+0.7) 25.3 °C (+5.1), 2021 15.5 °C (-4.7), 2020
Mean Temperature 13.8 °C (-1.8) 15.6 °C (-0.0) 20.0 °C, 2021 12.4 °C, 2009
Minimum Humidity 46% 13:15 47% 68%, 2010 34%, 2014
Maximum Humidity 79% 05:30 85% 95%, 2010 79%, 2011
Mean Humidity 66% 66% 86%, 2010 56%, 2014
Minimum Pressure 1004 hPa 03:47 1015 hPa 1031 hPa, 2015 993 hPa, 2012
Maximum Pressure 1009 hPa 23:35 1021 hPa 1033 hPa, 2015 1005 hPa, 2012
Mean Pressure 1006 hPa 1018 hPa 1032 hPa, 2015 999 hPa, 2012
Mean Wind Speed 6.2 mph (+1.8) 5.0 mph (+0.6) 12.6 mph, 2012 1.9 mph, 2021
Maximum Wind Speed 15.0 mph 13.6 mph 25.6 mph, 2012 8.3 mph, 2021
Maximum Gust 23.5 mph 12:36 20.3 mph 35.7 mph, 2019 12.5 mph, 2021
Mean Wind Direction SW
Rainfall 1.4 mm 14.5 mm (116%) 8.5 mm, 2010
Maximum Hourly Rain 0.8 mm 14:20 5.0 mm, 2016
Maximum 10-min Rain 0.5 mm 16:19 3.5 mm, 2010
Maximum Rain Rate 20 mm/h 16:19 78 mm/h, 2016
Minimum Dew Point 5.4 °C 01:27 6.3 °C 10.2 °C, 2010 2.1 °C, 2015
Maximum Dew Point 10.0 °C 15:11 11.5 °C 17.8 °C, 2016 8.0 °C, 2013
Mean Dew Point 7.4 °C 8.9 °C 13.8 °C, 2016 5.2 °C, 2015
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 9.7 °C 04:25 10.7 °C 14.4 °C, 2016 8.7 °C, 2009
Day Maximum (09-21) 18.3 °C 13:15 20.6 °C 25.3 °C, 2021 15.5 °C, 2020
Max 10m Temp Rise 0.6 °C 11:16 0.7 °C 0.8 °C, 2014 0.4 °C, 2012
Max 1hr Temp Rise 2.2 °C 06:55 2.6 °C 3.0 °C, 2014 1.1 °C, 2017
Max 1hr Hum Rise 22% 14:46 10% 22%, 2011 4%, 2020
Max 10m Temp Fall 0.3 °C 14:13 0.8 °C 2.1 °C, 2016 0.3 °C, 2009
Max 1hr Temp Fall 1.4 °C 14:36 2.0 °C 4.6 °C, 2016 0.9 °C, 2012
Max 1hr Hum Fall 13% 15:59 11% 16%, 2014 5%, 2017
Max 10m Wind Speed 10.6 mph 15:57 9.0 mph 18.4 mph, 2012 6.5 mph, 2018
Minimum Feels-like 7.5 °C 04:39 10.4 °C 17.0 °C, 2022 5.0 °C, 2013
Maximum Feels-like 18.3 °C 13:11 21.8 °C 28.6 °C, 2016 16.1 °C, 2020
Mean Feels-like 14.0 °C 16.5 °C 22.6 °C, 2021 12.4 °C, 2013
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 8.6 °C (-0.2) 10.1 °C (+1.4) 12.5 °C (+3.7), 2014 3.9 °C (-4.9), 2012
Humidity Range 33% 38% 54%, 2014 22%, 2017
Pressure Range 5 hPa 6 hPa 21 hPa, 2019 2 hPa, 2015
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 5 [33%]60 hrs (117%) [50%] 15 [100%], 2021 0 [0%], 2017
Wet Hours 1
[Mean rain rate: 1.4 mm/h]		19 hrs (193%) [9.9%] 6, 2012 0, 2009
Cloud Cover Partly Cloudy or Mostly Cloudy
Events None
Comments 14 Light, 16 Heavy, 17 Moderate Showers
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 8th June 2011.
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