Daily Report for 28th January 2023

<<Previous Day
Reset
Next Day>>
Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 2.4 °C (-0.5) 08:26 2.4 °C (-0.6) 8.9 °C (+6.0), 2021 -0.7 °C (-3.6), 2019
Maximum Temperature 6.3 °C (-1.5) 14:41 8.2 °C (+0.4) 12.9 °C (+5.1), 2018 1.2 °C (-6.6), 2011
Mean Temperature 4.3 °C (-1.0) 5.5 °C (-0.1) 11.1 °C, 2018 0.5 °C, 2011
Minimum Humidity 72% 13:12 78% 81%, 2021 51%, 2015
Maximum Humidity 88% 00:05 93% 97%, 2021 76%, 2011
Mean Humidity 81% 87% 91%, 2021 64%, 2011
Minimum Pressure 1032 hPa 23:38 1010 hPa 1032 hPa, 2023 983 hPa, 2014
Maximum Pressure 1034 hPa 09:52 1019 hPa 1037 hPa, 2022 989 hPa, 2014
Mean Pressure 1033 hPa 1014 hPa 1035 hPa, 2022 985 hPa, 2014
Mean Wind Speed 2.0 mph (-3.2) 6.1 mph (+0.9) 9.4 mph, 2015 2.0 mph, 2023
Maximum Wind Speed 6.7 mph 13:41 14.7 mph 25.9 mph, 2013 6.7 mph, 2023
Maximum Gust 10.4 mph 13:44 23.4 mph 34.2 mph, 2015 10.4 mph, 2023
Mean Wind Direction NNW
Rainfall 0.0 mm 53.0 mm (99%) 19.9 mm, 2021
Maximum Hourly Rain n/a 4.6, 2021
Maximum 10-min Rain n/a 1.5, 2014
Maximum Rain Rate n/a 24, 2015
Minimum Dew Point -0.5 °C 05:56 0.7 °C 8.1 °C, 2021 -6.5 °C, 2011
Maximum Dew Point 3.0 °C 23:54 5.8 °C 10.3 °C, 2018 -3.8 °C, 2011
Mean Dew Point 1.3 °C 3.5 °C 9.3 °C, 2021 -5.6 °C, 2011
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 1.8 °C * 22:08 3.5 °C 8.9 °C, 2021 0.4 °C, 2011
Day Maximum (09-21) 6.3 °C 14:43 8.1 °C 12.9 °C, 2018 1.2 °C, 2011
Max 10m Temp Rise 0.3 °C 10:10 0.4 °C 0.4 °C, 2010 0.1 °C, 2011
Max 1hr Temp Rise 1.4 °C 11:01 1.3 °C 1.8 °C, 2016 0.3 °C, 2011
Max 1hr Hum Rise 6% 16:32 6% 9%, 2013 2%, 2018
Max 10m Temp Fall 0.2 °C 05:17 0.4 °C 1.9 °C, 2015 0.2 °C, 2010
Max 1hr Temp Fall 0.7 °C 16:56 1.3 °C 2.9 °C, 2015 0.6 °C, 2018
Max 1hr Hum Fall 8% 10:29 6% 18%, 2015 3%, 2011
Max 10m Wind Speed 5.1 mph 13:45 10.9 mph 16.8 mph, 2013 5.1 mph, 2023
Minimum Feels-like -0.5 °C 01:36 -0.9 °C 6.7 °C, 2021 -6.0 °C, 2011
Maximum Feels-like 6.3 °C 14:07 8.3 °C 14.3 °C, 2018 0.2 °C, 2011
Mean Feels-like 3.3 °C 3.8 °C 11.3 °C, 2021 -3.7 °C, 2011
Air-frost Hrs 0 hrs 3 hrs 5 hrs, 2011 0 hrs, 2010
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 3.9 °C (-0.9) 5.8 °C (+1.0) 8.0 °C (+3.2), 2013 1.7 °C (-3.1), 2011
Humidity Range 16% 15% 44%, 2015 15%, 2018
Pressure Range 2 hPa 9 hPa 20 hPa, 2015 2 hPa, 2009
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0 [0%]54 hrs (87%) [26%] 8 [100%], 2019 0 [0%], 2009
Wet Hours 062 hrs (102%) [9.2%] 9, 2021 , 2009
Cloud Cover unknown
Events None
Comments blr
Extra Comments
Issues None known
Observer Absent? No
Pond Temperature (Heath) 2.5 °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.
View monthly summary

Daily Graph of Conditions

day graph

Webcam Summary of Cloud Conditions

daycamsumFull resolution individual images at up-to 5 minute intervals

Wind rose