Daily Report for 24th June 2019

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 17.1 °C (+5.5) 05:40 11.9 °C (+0.9) 17.4 °C (+5.8), 2017 8.9 °C (-2.7), 2021
Maximum Temperature 25.2 °C (+4.2) 17:06 19.9 °C (-0.0) 30.6 °C (+9.6), 2020 16.6 °C (-4.4), 2013
Mean Temperature 21.5 °C (+4.8) 15.8 °C (+0.4) 23.7 °C, 2020 13.2 °C, 2013
Minimum Humidity 61% 18:34 55% 62%, 2021 33%, 2009
Maximum Humidity 90% 06:15 90% 95%, 2012 68%, 2010
Mean Humidity 76% 75% 78%, 2021 53%, 2010
Minimum Pressure 1014 hPa 06:28 1010 hPa 1025 hPa, 2018 1008 hPa, 2012
Maximum Pressure 1019 hPa 22:42 1017 hPa 1027 hPa, 2018 1016 hPa, 2017
Mean Pressure 1016 hPa 1013 hPa 1026 hPa, 2018 1013 hPa, 2012
Mean Wind Speed 2.7 mph (-1.7) 4.9 mph (+0.5) 6.9 mph, 2017 2.0 mph, 2021
Maximum Wind Speed 8.4 mph 12:17 13.7 mph 20.6 mph, 2016 8.2 mph, 2021
Maximum Gust 14.0 mph 12:59 21.7 mph 29.0 mph, 2016 11.4 mph, 2021
Mean Wind Direction S
Rainfall 0.0 mm 52.3 mm (145%) 10.3 mm, 2012
Maximum Hourly Rain n/a 2.6, 2012
Maximum 10-min Rain n/a 1.7, 2012
Maximum Rain Rate n/a 50, 2012
Minimum Dew Point 15.0 °C 00:03 8.6 °C 15.0 °C, 2019 4.4 °C, 2013
Maximum Dew Point 18.9 °C 10:09 13.2 °C 18.9 °C, 2019 7.8 °C, 2013
Mean Dew Point 16.9 °C 11.0 °C 16.9 °C, 2019 5.9 °C, 2013
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 17.1 °C 05:28 12.0 °C 17.4 °C, 2017 8.9 °C, 2021
Day Maximum (09-21) 25.2 °C 17:07 19.8 °C 30.6 °C, 2020 16.6 °C, 2013
Max 10m Temp Rise 0.6 °C 07:01 0.7 °C 1.1 °C, 2009 0.4 °C, 2013
Max 1hr Temp Rise 2.5 °C 08:21 2.1 °C 3.4 °C, 2009 1.1 °C, 2013
Max 1hr Hum Rise 10% 15:30 10% 25%, 2014 6%, 2010
Max 10m Temp Fall 0.3 °C 19:53 0.5 °C 1.4 °C, 2012 0.3 °C, 2010
Max 1hr Temp Fall 1.3 °C 21:43 1.7 °C 3.6 °C, 2014 1.1 °C, 2017
Max 1hr Hum Fall 10% 14:30 11% 19%, 2012 7%, 2013
Max 10m Wind Speed 6.8 mph 12:24 10.1 mph 15.8 mph, 2016 6.0 mph, 2010
Minimum Feels-like 21.3 °C 05:11 12.6 °C 21.3 °C, 2019 9.1 °C, 2021
Maximum Feels-like 31.5 °C 17:02 22.0 °C 35.0 °C, 2020 16.6 °C, 2013
Mean Feels-like 26.7 °C 17.6 °C 27.5 °C, 2020 13.3 °C, 2013
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 8.1 °C (-1.3) 8.1 °C (-0.9) 14.9 °C (+5.5), 2020 5.5 °C (-3.9), 2017
Humidity Range 29% 35% 52%, 2012 21%, 2017
Pressure Range 5 hPa 6 hPa 10 hPa, 2012 2 hPa, 2015
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 2 [13%]106 hrs (74%) [29%] 15.2 [100%], 2020 0.2 [1%], 2017
Wet Hours 065 hrs (220%) [11%] 7, 2012 0, 2009
Cloud Cover am: Partly Cloudy transitioned to Overcast
pm: Overcast
Events None
Comments -
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 18.0 °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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