Daily Report for 7th December 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature -1.2 °C (-5.1) 23:54 3.0 °C (-1.0) 11.6 °C (+7.7), 2015 -3.1 °C (-7.0), 2010
Maximum Temperature 4.6 °C (-4.2) 13:49 6.7 °C (-2.2) 13.8 °C (+5.1), 2015 0.9 °C (-7.8), 2010
Mean Temperature 2.2 °C (-4.6) 4.8 °C (-1.6) 12.9 °C, 2015 -1.0 °C, 2010
Minimum Humidity 83% 14:03 82% 94%, 2020 45%, 2011
Maximum Humidity 94% 00:04 94% 98%, 2010 78%, 2016
Mean Humidity 90% 89% 95%, 2020 66%, 2011
Minimum Pressure 1016 hPa 23:57 1021 hPa 1025 hPa, 2013 986 hPa, 2021
Maximum Pressure 1025 hPa 00:00 1026 hPa 1028 hPa, 2013 1002 hPa, 2020
Mean Pressure 1021 hPa 1023 hPa 1026 hPa, 2013 998 hPa, 2021
Mean Wind Speed 3.1 mph (-2.0) 4.5 mph (-0.6) 9.4 mph, 2018 0.2 mph, 2020
Maximum Wind Speed 8.8 mph 14:16 11.2 mph 20.1 mph, 2011 5.5 mph, 2020
Maximum Gust 12.7 mph 00:30 16.9 mph 35.7 mph, 2018 8.0 mph, 2020
Mean Wind Direction N
Rainfall 0.0 mm 0.2 mm (2%) 6.4 mm, 2018
Maximum Hourly Rain n/a 3.9, 2021
Maximum 10-min Rain n/a 2, 2021
Maximum Rain Rate n/a 40, 2017
Minimum Dew Point -2.4 °C 23:23 1.7 °C 9.1 °C, 2015 -4.1 °C, 2010
Maximum Dew Point 2.1 °C 13:49 4.4 °C 12.0 °C, 2015 -0.6 °C, 2010
Mean Dew Point 0.7 °C 3.1 °C 11.0 °C, 2015 -2.4 °C, 2010
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 1.7 °C * 08:49 3.6 °C 12.9 °C, 2015 -3.1 °C, 2010
Day Maximum (09-21) 4.6 °C 13:50 6.7 °C 13.8 °C, 2015 0.9 °C, 2010
Max 10m Temp Rise 0.3 °C 10:52 0.3 °C 0.6 °C, 2012 0.2 °C, 2009
Max 1hr Temp Rise 1.0 °C 13:10 0.9 °C 2.2 °C, 2021 0.4 °C, 2015
Max 1hr Hum Rise 2% 09:07 3% 8%, 2012 1%, 2015
Max 10m Temp Fall 0.3 °C 15:14 0.3 °C 1.8 °C, 2017 0.1 °C, 2016
Max 1hr Temp Fall 1.3 °C 16:03 1.0 °C 3.5 °C, 2017 0.4 °C, 2020
Max 1hr Hum Fall 3% 10:58 4% 19%, 2014 1%, 2020
Max 10m Wind Speed 6.3 mph 02:39 8.3 mph 15.0 mph, 2018 3.5 mph, 2020
Minimum Feels-like -3.8 °C 23:27 -0.8 °C 12.6 °C, 2015 -6.3 °C, 2010
Maximum Feels-like 4.4 °C 14:35 6.0 °C 16.1 °C, 2015 0.9 °C, 2010
Mean Feels-like 0.2 °C 2.4 °C 14.6 °C, 2015 -3.1 °C, 2010
Air-frost Hrs 2 hrs 0.3 hrs 20 hrs, 2010 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 5.8 °C (+0.9) 3.8 °C (-1.3) 7.5 °C (+2.6), 2017 2.2 °C (-2.7), 2015
Humidity Range 11% 11% 44%, 2011 3%, 2020
Pressure Range 8 hPa 5 hPa 25 hPa, 2021 1 hPa, 2016
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 5 [70%]13 hrs (87%) [26%] 5.5 [77%], 2011 0 [0%], 2009
Wet Hours 01 hrs (7%) [0.6%] 7, 2023 0, 2010
Cloud Cover unknown
Events None
Comments data is awaiting quality control from site operator
Extra Comments
Issues None known
Observer Absent? No
Pond Temperature (Heath) 6.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 7th December 2022.
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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