Daily Report for 14th January 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature -0.4 °C (-3.4) 07:30 3.2 °C (+0.1) 7.8 °C (+4.8), 2011 -2.9 °C (-5.9), 2012
Maximum Temperature 8.0 °C (+0.2) 14:45 9.0 °C (+1.2) 12.9 °C (+5.1), 2020 2.4 °C (-5.4), 2013
Mean Temperature 3.0 °C (-1.6) 6.0 °C (+0.6) 10.5 °C, 2011 0.7 °C, 2012
Minimum Humidity 79% 14:44 79% 98%, 2010 58%, 2015
Maximum Humidity 96% 10:14 93% 98%, 2010 81%, 2019
Mean Humidity 89% 88% 98%, 2010 74%, 2015
Minimum Pressure 1032 hPa 23:57 1013 hPa 1032 hPa, 2022 992 hPa, 2015
Maximum Pressure 1040 hPa 00:00 1024 hPa 1040 hPa, 2022 1000 hPa, 2020
Mean Pressure 1037 hPa 1019 hPa 1037 hPa, 2022 997 hPa, 2020
Mean Wind Speed 0.1 mph (-5.1) 4.6 mph (-0.6) 11.5 mph, 2020 0.1 mph, 2022
Maximum Wind Speed 4.3 mph 00:55 12.3 mph 27.9 mph, 2020 4.3 mph, 2022
Maximum Gust 8.0 mph 01:22 20.6 mph 42.6 mph, 2020 7.4 mph, 2012
Mean Wind Direction WNW
Rainfall 0.0 mm 15.2 mm (57%) 25.2 mm, 2021
Maximum Hourly Rain n/a 5.5, 2011
Maximum 10-min Rain n/a 3.8, 2011
Maximum Rain Rate n/a 40, 2011
Minimum Dew Point -1.5 °C 07:30 1.5 °C 6.7 °C, 2011 -4.8 °C, 2016
Maximum Dew Point 4.7 °C 14:30 6.7 °C 11.5 °C, 2020 0.5 °C, 2017
Mean Dew Point 1.4 °C 4.1 °C 9.3 °C, 2011 -1.7 °C, 2017
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) -0.4 °C 07:31 4.1 °C 11.3 °C, 2011 -2.9 °C, 2012
Day Maximum (09-21) 8.0 °C 14:45 8.8 °C 12.9 °C, 2020 2.4 °C, 2013
Max 10m Temp Rise 0.5 °C 10:06 0.4 °C 0.5 °C, 2012 0.1 °C, 2011
Max 1hr Temp Rise 2.3 °C 10:27 1.3 °C 2.3 °C, 2022 0.2 °C, 2021
Max 1hr Hum Rise 5% 17:41 4% 14%, 2015 0%, 2010
Max 10m Temp Fall 0.5 °C 17:35 0.5 °C 1.5 °C, 2021 0.2 °C, 2010
Max 1hr Temp Fall 2.0 °C 17:35 1.4 °C 3.9 °C, 2021 0.5 °C, 2010
Max 1hr Hum Fall 7% 12:01 6% 13%, 2014 0%, 2010
Max 10m Wind Speed 3.7 mph 00:58 9.5 mph 20.9 mph, 2020 3.7 mph, 2022
Minimum Feels-like -1.1 °C 01:22 0.2 °C 5.3 °C, 2011 -6.2 °C, 2017
Maximum Feels-like 8.0 °C 14:45 8.8 °C 14.9 °C, 2020 1.6 °C, 2013
Mean Feels-like 2.9 °C 4.7 °C 10.9 °C, 2011 -1.4 °C, 2013
Air-frost Hrs 1 hrs 0.8 hrs 10 hrs, 2012 0 hrs, 2010
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 8.4 °C (+3.6) 5.8 °C (+1.1) 8.4 °C (+3.6), 2022 2.3 °C (-2.5), 2009
Humidity Range 17% 14% 31%, 2015 0%, 2010
Pressure Range 8 hPa 10 hPa 17 hPa, 2013 4 hPa, 2009
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 7.4 [100%]44 hrs (147%) [44%] 7.4 [100%], 2012 0 [0%], 2009
Wet Hours 018 hrs (59%) [5.4%] 14, 2021 , 2009
Cloud Cover Sunny
Events Air Frost
Maximum possible sunshine
Comments -
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 5.0 °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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Webcam Summary of Cloud Conditions

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