Daily Report for 3rd January 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 8.6 °C (+5.4) 23:56 10.3 °C (+7.1) 9.5 °C (+6.3), 2013 -4.4 °C (-7.6), 2009
Maximum Temperature 10.6 °C (+2.8) 14:03 13.0 °C (+5.2) 12.0 °C (+4.2), 2012 2.1 °C (-5.7), 2009
Mean Temperature 9.5 °C (+4.1) 11.5 °C (+6.1) 10.5 °C, 2013 -1.1 °C, 2009
Minimum Humidity 81% 13:53 79% 90%, 2013 47%, 2009
Maximum Humidity 91% 23:39 92% 98%, 2013 68%, 2009
Mean Humidity 86% 86% 94%, 2013 58%, 2009
Minimum Pressure 1002 hPa 23:49 1008 hPa 1043 hPa, 2019 984 hPa, 2016
Maximum Pressure 1012 hPa 00:42 1016 hPa 1044 hPa, 2019 1001 hPa, 2014
Mean Pressure 1008 hPa 1012 hPa 1043 hPa, 2019 991 hPa, 2016
Mean Wind Speed 7.5 mph (+2.3) 8.7 mph (+3.5) 12.6 mph, 2018 1.4 mph, 2019
Maximum Wind Speed 14.9 mph 03:59 16.3 mph 29.0 mph, 2018 6.7 mph, 2019
Maximum Gust 30.8 mph 01:27 28.1 mph 50.0 mph, 2018 8.7 mph, 2011
Mean Wind Direction SW
Rainfall 0.0 mm 1.9 mm (33%) 15.6 mm, 2015
Maximum Hourly Rain n/a 7, 2012
Maximum 10-min Rain n/a 5, 2012
Maximum Rain Rate n/a 120, 2012
Minimum Dew Point 6.6 °C 06:22 7.7 °C 9.0 °C, 2013 -4.3 °C, 2010
Maximum Dew Point 7.7 °C 14:28 10.4 °C 11.1 °C, 2012 -0.7 °C, 2011
Mean Dew Point 7.2 °C 9.2 °C 9.5 °C, 2013 -2.9 °C, 2009
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 9.0 °C * 06:02 11.0 °C 9.8 °C, 2020 -4.4 °C, 2009
Day Maximum (09-21) 10.6 °C 14:02 12.6 °C 12.0 °C, 2012 2.1 °C, 2009
Max 10m Temp Rise 0.2 °C 09:14 0.3 °C 0.4 °C, 2010 0.2 °C, 2013
Max 1hr Temp Rise 0.5 °C 12:01 0.7 °C 1.5 °C, 2011 0.4 °C, 2020
Max 1hr Hum Rise 2% 15:59 4% 15%, 2018 1%, 2013
Max 10m Temp Fall 0.2 °C 16:39 0.2 °C 2.0 °C, 2018 0.1 °C, 2013
Max 1hr Temp Fall 0.4 °C 15:28 0.7 °C 4.3 °C, 2012 0.4 °C, 2013
Max 1hr Hum Fall 4% 10:00 4% 16%, 2012 2%, 2013
Max 10m Wind Speed 11.0 mph 04:08 12.7 mph 22.9 mph, 2018 4.7 mph, 2011
Minimum Feels-like 4.6 °C 01:27 8.1 °C 6.0 °C, 2013 -5.5 °C, 2010
Maximum Feels-like 10.9 °C 13:31 14.4 °C 13.8 °C, 2012 2.4 °C, 2010
Mean Feels-like 7.5 °C 11.6 °C 11.0 °C, 2013 -1.0 °C, 2010
Air-frost Hrs 0 hrs 0 hrs 12 hrs, 2010 0 hrs, 2012
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 2.0 °C (-2.6) 2.8 °C (-1.9) 6.5 °C (+1.9), 2009 1.9 °C (-2.7), 2013
Humidity Range 10% 13% 31%, 2014 8%, 2013
Pressure Range 11 hPa 8 hPa 21 hPa, 2020 1 hPa, 2019
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0 [0%]2.9 hrs (46%) [14%] 8 [113%], 2009 0 [0%], 2015
Wet Hours 03 hrs (46%) [4.2%] 10, 2015 , 2009
Cloud Cover am: Mostly Cloudy
pm: Overcast
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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Daily Graph of Conditions

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Webcam Summary of Cloud Conditions

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