Daily Report for 14th December 2023

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 2.9 °C (-0.7) 04:56 3.6 °C (-0.2) 9.8 °C (+6.2), 2021 -2.8 °C (-6.4), 2022
Maximum Temperature 7.6 °C (-0.5) 16:34 7.9 °C (-0.7) 14.6 °C (+6.5), 2016 0.4 °C (-7.7), 2022
Mean Temperature 5.5 °C (-0.6) 6.0 °C (-0.5) 11.1 °C, 2021 -1.2 °C, 2022
Minimum Humidity 90% 02:41 85% 90%, 2023 61%, 2019
Maximum Humidity 97% 21:20 96% 98%, 2009 80%, 2011
Mean Humidity 93% 91% 95%, 2009 75%, 2011
Minimum Pressure 1016 hPa 00:01 1002 hPa 1027 hPa, 2010 975 hPa, 2012
Maximum Pressure 1030 hPa 23:54 1013 hPa 1037 hPa, 2010 993 hPa, 2017
Mean Pressure 1023 hPa 1008 hPa 1032 hPa, 2010 985 hPa, 2012
Mean Wind Speed 3.5 mph (-1.6) 5.0 mph (-0.1) 8.5 mph, 2019 1.5 mph, 2009
Maximum Wind Speed 9.2 mph 10:58 13.1 mph 23.4 mph, 2019 4.3 mph, 2009
Maximum Gust 13.8 mph 10:59 20.7 mph 42.6 mph, 2019 6.2 mph, 2009
Mean Wind Direction NW
Rainfall 0.5 mm 34.0 mm (132%) 11.0 mm, 2019
Maximum Hourly Rain 0.3 mm 17:06 5.9 mm, 2019
Maximum 10-min Rain 0.3 mm 17:06 2.6 mm, 2019
Maximum Rain Rate n/a 26, 2019
Minimum Dew Point 1.7 °C 04:56 2.3 °C 8.1 °C, 2021 -4.4 °C, 2022
Maximum Dew Point 6.9 °C 16:34 6.6 °C 10.3 °C, 2020 -0.7 °C, 2022
Mean Dew Point 4.5 °C 4.7 °C 9.3 °C, 2021 -2.8 °C, 2022
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 2.9 °C 05:01 3.9 °C 9.7 °C, 2021 -2.3 °C, 2022
Day Maximum (09-21) 7.6 °C 16:35 7.7 °C 14.6 °C, 2016 0.4 °C, 2022
Max 10m Temp Rise 0.4 °C 20:16 0.4 °C 1.2 °C, 2022 0.2 °C, 2010
Max 1hr Temp Rise 1.1 °C 20:49 1.3 °C 2.6 °C, 2016 0.6 °C, 2010
Max 1hr Hum Rise 4% 12:17 4% 9%, 2013 2%, 2015
Max 10m Temp Fall 0.5 °C 19:33 0.3 °C 0.5 °C, 2019 0.1 °C, 2014
Max 1hr Temp Fall 1.4 °C 04:07 1.0 °C 1.7 °C, 2020 0.2 °C, 2014
Max 1hr Hum Fall 2% 10:17 5% 13%, 2019 2%, 2015
Max 10m Wind Speed 6.8 mph 11:58 9.6 mph 19.3 mph, 2019 3.4 mph, 2009
Minimum Feels-like -0.8 °C 08:00 0.3 °C 7.1 °C, 2021 -9.3 °C, 2022
Maximum Feels-like 7.2 °C 18:05 8.1 °C 15.7 °C, 2016 -0.7 °C, 2022
Mean Feels-like 3.6 °C 4.1 °C 11.8 °C, 2021 -5.6 °C, 2022
Air-frost Hrs 0 hrs 3 hrs 22 hrs, 2022 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 4.7 °C (+0.2) 4.3 °C (-0.5) 8.8 °C (+4.3), 2012 1.9 °C (-2.6), 2011
Humidity Range 7% 12% 31%, 2019 7%, 2021
Pressure Range 13 hPa 11 hPa 24 hPa, 2012 3 hPa, 2016
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0.1 [1%]20 hrs (67%) [20%] 5 [71%], 2016 0 [0%], 2012
Wet Hours 2
[Mean rain rate: 0.2 mm/h]
52 hrs (187%) [16%] 7, 2020 0, 2016
Cloud Cover unknown
Events None
Comments -
Extra Comments 1130 rainbow
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 5.5 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 14th December 2023.
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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