Daily Report for 8th June 2009

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 8.7 °C (-2.7) 03:47 9.2 °C (-2.0) 14.3 °C (+2.9), 2022 8.7 °C (-2.7), 2009
Maximum Temperature 15.8 °C (-4.4) 15:42 18.5 °C (-1.4) 25.3 °C (+5.1), 2021 15.5 °C (-4.7), 2020
Mean Temperature 12.4 °C (-3.5) 13.8 °C (-1.7) 20.0 °C, 2021 12.4 °C, 2009
Minimum Humidity 63% 18:45 51% 68%, 2010 34%, 2014
Maximum Humidity 94% 06:36 85% 95%, 2010 79%, 2011
Mean Humidity 80% 69% 86%, 2010 56%, 2014
Minimum Pressure 1004 hPa 02:40 1011 hPa 1031 hPa, 2015 993 hPa, 2012
Maximum Pressure 1007 hPa 14:27 1016 hPa 1033 hPa, 2015 1005 hPa, 2012
Mean Pressure 1006 hPa 1014 hPa 1032 hPa, 2015 999 hPa, 2012
Mean Wind Speed 2.9 mph (-1.5) 3.6 mph (-0.8) 12.6 mph, 2012 1.9 mph, 2021
Maximum Wind Speed n/a 0.0 mph 25.6, 2012 8.3, 2021
Maximum Gust 15.0 mph 17.5 mph 35.7 mph, 2019 12.5 mph, 2021
Mean Wind Direction n/a
Rainfall 0.0 mm 26.0 mm (207%) 8.5 mm, 2010
Maximum Hourly Rain n/a 5, 2016
Maximum 10-min Rain n/a 3.5, 2010
Maximum Rain Rate n/a 78, 2016
Minimum Dew Point 7.2 °C 01:04 5.0 °C 10.2 °C, 2010 2.1 °C, 2015
Maximum Dew Point 11.1 °C 12:00 10.6 °C 17.8 °C, 2016 8.0 °C, 2013
Mean Dew Point 8.9 °C 7.7 °C 13.8 °C, 2016 5.2 °C, 2015
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 8.7 °C 9.7 °C 14.4 °C, 2016 8.7 °C, 2009
Day Maximum (09-21) 15.8 °C 18.5 °C 25.3 °C, 2021 15.5 °C, 2020
Max 10m Temp Rise 0.6 °C 10:21 0.7 °C 0.8 °C, 2014 0.4 °C, 2012
Max 1hr Temp Rise 2.2 °C 10:44 2.5 °C 3.0 °C, 2014 1.1 °C, 2017
Max 1hr Hum Rise 6% 20:29 6% 22%, 2011 4%, 2020
Max 10m Temp Fall 0.3 °C 12:55 0.5 °C 2.1 °C, 2016 0.3 °C, 2009
Max 1hr Temp Fall 1.0 °C 20:18 1.6 °C 4.6 °C, 2016 0.9 °C, 2012
Max 1hr Hum Fall 8% 11:11 11% 16%, 2014 5%, 2017
Max 10m Wind Speed n/a 0.0 mph 18.4, 2012 6.5, 2018
Minimum Feels-like n/a 0.0 °C 17, 2022 5, 2013
Maximum Feels-like n/a 0.0 °C 28.6, 2016 16.1, 2020
Mean Feels-like n/a 0.0 °C 22.6, 2021 12.4, 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 7.1 °C (-1.7) 9.2 °C (+0.5) 12.5 °C (+3.7), 2014 3.9 °C (-4.9), 2012
Humidity Range 31% 34% 54%, 2014 22%, 2017
Pressure Range 3 hPa 4 hPa 21 hPa, 2019 2 hPa, 2015
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 2.3 [15%]48 hrs (93%) [40%] 15 [100%], 2021 0 [0%], 2017
Wet Hours 018 hrs (182%) [9.4%] 6, 2012 0, 2009
Cloud Cover not available
Events None
Comments -
Extra Comments
Issues None known
Observer Absent? No
Pond Temperature (Heath) 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 8th June 2009.
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


Webcam summary not available for this day

Wind rose