Daily Report for 9th June 2019

<<Previous Day
Reset
Next Day>>
Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 9.7 °C (-1.0) 05:30 11.8 °C (+1.4) 14.7 °C (+4.0), 2014 7.0 °C (-3.7), 2015
Maximum Temperature 19.3 °C (-0.2) 14:24 20.6 °C (+1.5) 26.8 °C (+7.3), 2021 14.1 °C (-5.4), 2013
Mean Temperature 14.7 °C (-0.6) 16.2 °C (+1.4) 20.6 °C, 2021 11.2 °C, 2015
Minimum Humidity 44% 13:13 47% 72%, 2009 20%, 2021
Maximum Humidity 88% 05:30 88% 96%, 2009 75%, 2012
Mean Humidity 68% 69% 86%, 2009 55%, 2012
Minimum Pressure 1019 hPa 23:56 1007 hPa 1031 hPa, 2015 1002 hPa, 2010
Maximum Pressure 1023 hPa 08:51 1016 hPa 1033 hPa, 2015 1007 hPa, 2010
Mean Pressure 1021 hPa 1012 hPa 1032 hPa, 2015 1004 hPa, 2010
Mean Wind Speed 3.3 mph (-1.1) 5.7 mph (+1.3) 8.7 mph, 2012 1.8 mph, 2016
Maximum Wind Speed 10.6 mph 13:31 15.1 mph 18.1 mph, 2012 6.2 mph, 2016
Maximum Gust 13.8 mph 12:39 23.4 mph 27.0 mph, 2012 9.4 mph, 2016
Mean Wind Direction SW
Rainfall 0.4 mm 8.8 mm (65%) 3.9 mm, 2014
Maximum Hourly Rain 0.2 mm 3.0 mm, 2010
Maximum 10-min Rain 0.2 mm 2.2 mm, 2010
Maximum Rain Rate n/a 30, 2010
Minimum Dew Point 6.2 °C 13:13 7.1 °C 10.6 °C, 2010 1.3 °C, 2021
Maximum Dew Point 11.1 °C 17:45 12.5 °C 16.5 °C, 2014 6.0 °C, 2015
Mean Dew Point 8.6 °C 10.0 °C 13.0 °C, 2010 3.4 °C, 2015
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 9.7 °C 05:30 11.9 °C 14.7 °C, 2014 7.0 °C, 2015
Day Maximum (09-21) 19.3 °C 14:25 20.4 °C 26.8 °C, 2021 14.1 °C, 2013
Max 10m Temp Rise 0.8 °C 11:03 0.7 °C 0.8 °C, 2011 0.3 °C, 2013
Max 1hr Temp Rise 2.2 °C 08:42 2.2 °C 3.0 °C, 2011 0.8 °C, 2013
Max 1hr Hum Rise 16% 16:00 12% 18%, 2014 3%, 2013
Max 10m Temp Fall 0.7 °C 17:12 0.6 °C 0.7 °C, 2014 0.3 °C, 2013
Max 1hr Temp Fall 2.5 °C 17:16 2.0 °C 2.5 °C, 2019 1.0 °C, 2010
Max 1hr Hum Fall 14% 18:18 12% 18%, 2021 5%, 2013
Max 10m Wind Speed 7.0 mph 17:02 11.0 mph 14.4 mph, 2012 4.1 mph, 2016
Minimum Feels-like 7.9 °C 04:59 12.0 °C 15.9 °C, 2014 3.9 °C, 2015
Maximum Feels-like 19.9 °C 15:47 22.1 °C 29.4 °C, 2014 14.3 °C, 2013
Mean Feels-like 15.3 °C 17.5 °C 23.0 °C, 2021 10.5 °C, 2015
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 9.6 °C (+0.8) 8.7 °C (+0.1) 13.7 °C (+4.9), 2021 4.0 °C (-4.8), 2013
Humidity Range 44% 40% 64%, 2021 19%, 2013
Pressure Range 4 hPa 8 hPa 9 hPa, 2016 2 hPa, 2015
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 7.2 [48%]51 hrs (97%) [38%] 13.5 [90%], 2021 0.2 [1%], 2009
Wet Hours 1
[Mean rain rate: 0.4 mm/h]
15 hrs (135%) [6.9%] 9, 2009 0, 2012
Cloud Cover am: Mostly Sunny
pm: Mostly Cloudy
Events None
Comments pm shs
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.
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