Daily Report for 1st January 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 12.9 °C (+9.7) 22:23 12.9 °C (+9.7) 12.9 °C (+9.7), 2022 -1.7 °C (-4.9), 2010
Maximum Temperature 15.3 °C (+7.5) 11:58 15.3 °C (+7.5) 15.3 °C (+7.5), 2022 2.4 °C (-5.4), 2010
Mean Temperature 13.5 °C (+8.6) 13.5 °C (+8.6) 13.5 °C, 2022 -0.0 °C, 2010
Minimum Humidity 75% 11:41 75% 90%, 2021 60%, 2009
Maximum Humidity 92% 01:52 92% 97%, 2014 83%, 2009
Mean Humidity 86% 86% 93%, 2021 72%, 2009
Minimum Pressure 1014 hPa 23:52 1014 hPa 1034 hPa, 2019 984 hPa, 2014
Maximum Pressure 1021 hPa 00:01 1021 hPa 1041 hPa, 2019 1002 hPa, 2014
Mean Pressure 1018 hPa 1018 hPa 1036 hPa, 2019 992 hPa, 2014
Mean Wind Speed 9.2 mph (+4.0) 9.2 mph (+4.0) 9.8 mph, 2014 1.9 mph, 2021
Maximum Wind Speed 16.0 mph 17:29 16.0 mph 25.1 mph, 2014 5.8 mph, 2021
Maximum Gust 22.8 mph 15:02 22.8 mph 35.5 mph, 2014 11.4 mph, 2021
Mean Wind Direction SW
Rainfall 0.0 mm 0.0 mm (0%) 7.9 mm, 2014
Maximum Hourly Rain n/a 4.4, 2012
Maximum 10-min Rain n/a 1.3, 2012
Maximum Rain Rate n/a 10, 2012
Minimum Dew Point 10.0 °C 09:19 10.0 °C 10.0 °C, 2022 -3.4 °C, 2010
Maximum Dew Point 12.0 °C 01:34 12.0 °C 12.0 °C, 2022 -0.9 °C, 2010
Mean Dew Point 11.2 °C 11.2 °C 11.2 °C, 2022 -2.4 °C, 2010
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 12.8 °C * 21:38 12.8 °C 12.8 °C, 2022 -1.2 °C, 2010
Day Maximum (09-21) 15.3 °C 11:54 15.3 °C 15.3 °C, 2022 2.4 °C, 2010
Max 10m Temp Rise 0.4 °C 10:21 0.4 °C 0.4 °C, 2016 0.2 °C, 2011
Max 1hr Temp Rise 1.0 °C 10:36 1.0 °C 1.7 °C, 2016 0.7 °C, 2012
Max 1hr Hum Rise 3% 13:03 3% 8%, 2014 3%, 2011
Max 10m Temp Fall 0.3 °C 15:36 0.3 °C 1.6 °C, 2017 0.1 °C, 2015
Max 1hr Temp Fall 0.9 °C 15:53 0.9 °C 3.8 °C, 2017 0.0 °C, 2015
Max 1hr Hum Fall 4% 07:51 4% 13%, 2019 2%, 2015
Max 10m Wind Speed 13.3 mph 18:08 13.3 mph 16.2 mph, 2014 4.5 mph, 2020
Minimum Feels-like 14.3 °C 08:28 14.3 °C 14.3 °C, 2022 -6.3 °C, 2010
Maximum Feels-like 17.1 °C 11:50 17.1 °C 17.1 °C, 2022 2.4 °C, 2010
Mean Feels-like 15.4 °C 15.4 °C 15.4 °C, 2022 -2.7 °C, 2010
Air-frost Hrs 0 hrs 0 hrs 12 hrs, 2010 0 hrs, 2011
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 2.4 °C (-2.2) 2.4 °C (-2.2) 7.5 °C (+2.9), 2016 2.3 °C (-2.3), 2018
Humidity Range 17% 17% 27%, 2013 5%, 2021
Pressure Range 7 hPa 7 hPa 19 hPa, 2013 1 hPa, 2009
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 2.5 [35%]2.5 hrs (119%) [35%] 7 [99%], 2010 0 [0%], 2009
Wet Hours 00 hrs (0%) [0%] 9, 2017 , 2009
Cloud Cover am: Mostly Sunny
pm: Mostly Cloudy
Events None
Comments -
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 9.0 °C
Notes
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 initially pulled from the official weather station at Heathrow, and later adjusted by hand to reflect local conditions based on webcam observations. Wet hrs are dervied algorithmically from rainfall data, though may be adjusted manually. Cloud cover and Events are manually reported, often with multi-week delays.
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