Daily Report for 22nd May 2010

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 10.6 °C (+0.8) 05:49 6.0 °C (-2.5) 14.2 °C (+4.4), 2020 8.2 °C (-1.6), 2009
Maximum Temperature 24.9 °C (+6.5) 17:10 15.3 °C (-2.0) 25.2 °C (+6.8), 2017 14.2 °C (-4.2), 2013
Mean Temperature 17.2 °C (+3.7) 10.5 °C (-2.3) 19.1 °C, 2020 10.7 °C, 2021
Minimum Humidity 41% 16:22 50% 62%, 2021 35%, 2011
Maximum Humidity 92% 07:27 87% 95%, 2022 75%, 2020
Mean Humidity 66% 69% 82%, 2021 54%, 2019
Minimum Pressure 1027 hPa 18:02 1017 hPa 1027 hPa, 2010 997 hPa, 2021
Maximum Pressure 1031 hPa 00:09 1021 hPa 1031 hPa, 2010 1003 hPa, 2014
Mean Pressure 1029 hPa 1019 hPa 1029 hPa, 2010 1001 hPa, 2014
Mean Wind Speed 3.5 mph (-1.2) 3.4 mph (-1.3) 9.1 mph, 2011 2.3 mph, 2016
Maximum Wind Speed 9.4 mph 9.2 mph 21.0 mph, 2011 9.4 mph, 2010
Maximum Gust 13.6 mph 16:02 13.3 mph 33.8 mph, 2011 13.6 mph, 2010
Mean Wind Direction ENE
Rainfall 0.0 mm 63.9 mm (196%) 7.8 mm, 2014
Maximum Hourly Rain n/a 3.2, 2014
Maximum 10-min Rain n/a 1.7, 2014
Maximum Rain Rate n/a 30, 2014
Minimum Dew Point 8.3 °C 20:14 2.2 °C 9.6 °C, 2012 0.0 °C, 2013
Maximum Dew Point 12.8 °C 11:09 7.3 °C 15.5 °C, 2012 8.2 °C, 2009
Mean Dew Point 10.3 °C 4.8 °C 12.6 °C, 2012 5.4 °C, 2013
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 10.6 °C 6.3 °C 17.2 °C, 2020 8.2 °C, 2009
Day Maximum (09-21) 24.9 °C 15.3 °C 25.2 °C, 2017 14.2 °C, 2013
Max 10m Temp Rise n/a 00:24 0.5 °C 1, 2012 0.5, 2013
Max 1hr Temp Rise n/a 11:20 1.9 °C 3.9, 2012 1.1, 2013
Max 1hr Hum Rise 18% 01:24 8% 21%, 2014 4%, 2013
Max 10m Temp Fall n/a 00:34 0.4 °C 2.3, 2014 0.3, 2015
Max 1hr Temp Fall n/a 01:24 1.4 °C 4.4, 2014 1.2, 2015
Max 1hr Hum Fall 12% 10:10 10% 24%, 2022 7%, 2021
Max 10m Wind Speed n/a 15:50 0.5 mph 14.7, 2020 6.2, 2012
Minimum Feels-like 11.2 °C 05:25 4.7 °C 15.2 °C, 2020 5.3 °C, 2013
Maximum Feels-like 27.1 °C 17:05 15.7 °C 28.7 °C, 2012 14.2 °C, 2013
Mean Feels-like 18.6 °C 10.1 °C 20.2 °C, 2020 9.8 °C, 2021
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 14.3 °C (+5.7) 9.3 °C (+0.5) 14.4 °C (+5.8), 2017 5.8 °C (-2.8), 2014
Humidity Range 51% 37% 58%, 2022 27%, 2015
Pressure Range 4 hPa 4 hPa 13 hPa, 2021 3 hPa, 2013
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 14.5 [100%]113 hrs (85%) [37%] 14.5 [100%], 2010 1.7 [12%], 2013
Wet Hours 023 hrs (80%) [4.3%] 7, 2021 0, 2009
Cloud Cover Sunny
Events Maximum possible sunshine
Comments
Extra Comments
Issues No wind data due to house move - Mean values based on Heathrow; Speed and Gust regressionaly derived from the Mean
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 22nd May 2010.
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


Webcam summary not available for this day

Wind rose