Daily Report for 6th January 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature -1.8 °C (-4.9) 05:03 5.1 °C (+1.9) 8.9 °C (+5.8), 2014 -4.6 °C (-7.7), 2009
Maximum Temperature 6.9 °C (-0.9) 22:43 10.0 °C (+2.2) 12.2 °C (+4.4), 2014 0.3 °C (-7.5), 2010
Mean Temperature 2.6 °C (-2.9) 7.4 °C (+2.1) 10.9 °C, 2014 -2.1 °C, 2009
Minimum Humidity 74% 12:38 78% 94%, 2011 42%, 2009
Maximum Humidity 94% 09:50 92% 98%, 2010 62%, 2009
Mean Humidity 88% 86% 97%, 2013 52%, 2009
Minimum Pressure 1011 hPa 21:06 1007 hPa 1036 hPa, 2019 989 hPa, 2016
Maximum Pressure 1022 hPa 01:32 1017 hPa 1038 hPa, 2019 997 hPa, 2016
Mean Pressure 1017 hPa 1012 hPa 1037 hPa, 2019 993 hPa, 2016
Mean Wind Speed 4.7 mph (-0.5) 6.8 mph (+1.6) 11.0 mph, 2014 1.4 mph, 2016
Maximum Wind Speed 15.9 mph 17:21 15.4 mph 20.1 mph, 2014 7.3 mph, 2019
Maximum Gust 22.8 mph 17:14 25.3 mph 32.2 mph, 2014 10.4 mph, 2016
Mean Wind Direction SW
Rainfall 0.5 mm 7.2 mm (63%) 16.8 mm, 2014
Maximum Hourly Rain 0.3 mm 22:23 3.9 mm, 2014
Maximum 10-min Rain 0.3 mm 22:23 3.1 mm, 2014
Maximum Rain Rate n/a 60, 2014
Minimum Dew Point -3.1 °C 04:52 2.9 °C 6.4 °C, 2013 -5.9 °C, 2010
Maximum Dew Point 5.7 °C 22:40 7.6 °C 11.9 °C, 2014 0.0 °C, 2010
Mean Dew Point 0.8 °C 5.2 °C 8.1 °C, 2014 -3.4 °C, 2009
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) -1.8 °C 04:45 6.7 °C 9.2 °C, 2014 -4.6 °C, 2009
Day Maximum (09-21) 6.9 °C 18:37 9.7 °C 12.2 °C, 2014 0.3 °C, 2010
Max 10m Temp Rise 0.4 °C 11:09 0.3 °C 1.7 °C, 2018 0.1 °C, 2010
Max 1hr Temp Rise 1.9 °C 11:09 1.1 °C 2.8 °C, 2017 0.2 °C, 2010
Max 1hr Hum Rise 6% 20:19 4% 15%, 2014 1%, 2016
Max 10m Temp Fall 0.3 °C 00:53 0.5 °C 0.9 °C, 2014 0.1 °C, 2013
Max 1hr Temp Fall 1.1 °C 01:04 1.4 °C 2.3 °C, 2014 0.4 °C, 2013
Max 1hr Hum Fall 10% 11:13 6% 14%, 2015 1%, 2016
Max 10m Wind Speed 13.3 mph 19:07 12.1 mph 16.1 mph, 2014 4.8 mph, 2019
Minimum Feels-like -4.8 °C 09:29 1.6 °C 4.7 °C, 2014 -10.1 °C, 2010
Maximum Feels-like 5.3 °C 21:14 10.2 °C 14.4 °C, 2014 0.3 °C, 2010
Mean Feels-like 0.4 °C 6.1 °C 11.0 °C, 2014 -1.3 °C, 2010
Air-frost Hrs 10 hrs 2 hrs 10 hrs, 2022 0 hrs, 2011
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 8.7 °C (+4.0) 5.0 °C (+0.3) 8.7 °C (+4.0), 2022 1.7 °C (-3.0), 2013
Humidity Range 20% 14% 31%, 2014 3%, 2016
Pressure Range 11 hPa 10 hPa 22 hPa, 2018 2 hPa, 2021
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 2 [28%]12 hrs (97%) [29%] 8 [111%], 2009 0 [0%], 2010
Wet Hours 2
[Mean rain rate: 0.2 mm/h]
8 hrs (62%) [5.6%] 14, 2010 , 2009
Cloud Cover am: Sunny transitioned to Overcast
pm: Overcast
Events Air Frost
Comments late rn
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 7.0 °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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