Daily Report for 31st July 2009

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 11.7 °C (-2.2) 06:15 13.5 °C (+0.1) 17.3 °C (+3.4), 2010 8.5 °C (-5.4), 2015
Maximum Temperature 22.9 °C (+0.2) 15:53 21.7 °C (-0.7) 36.2 °C (+13.5), 2020 20.0 °C (-2.7), 2012
Mean Temperature 16.7 °C (-1.0) 17.0 °C (-0.3) 25.6 °C, 2020 15.9 °C, 2015
Minimum Humidity 41% 17:34 53% 66%, 2013 29%, 2020
Maximum Humidity 80% 07:13 90% 93%, 2018 73%, 2016
Mean Humidity 60% 74% 79%, 2012 57%, 2020
Minimum Pressure 1015 hPa 23:52 1009 hPa 1015 hPa, 2009 1008 hPa, 2019
Maximum Pressure 1023 hPa 05:36 1015 hPa 1023 hPa, 2009 1013 hPa, 2010
Mean Pressure 1019 hPa 1012 hPa 1019 hPa, 2009 1011 hPa, 2017
Mean Wind Speed n/a (-4.3) 0.0 mph (-4.3) 7.3, 2019 2.3, 2015
Maximum Wind Speed n/a 0.0 mph 15.8, 2019 9.7, 2015
Maximum Gust n/a 0.0 mph 25.8, 2016 12.3, 2015
Mean Wind Direction n/a
Rainfall 0.0 mm 55.4 mm (132%) 5.9 mm, 2018
Maximum Hourly Rain n/a 18:29 4.2, 2018
Maximum 10-min Rain n/a 18:29 2, 2018
Maximum Rain Rate n/a 18:29 53, 2018
Minimum Dew Point 7.3 °C 01:08 9.4 °C 12.9 °C, 2013 4.4 °C, 2015
Maximum Dew Point 10.7 °C 11:17 14.5 °C 18.0 °C, 2020 10.7 °C, 2009
Mean Dew Point 8.5 °C 12.0 °C 15.3 °C, 2013 6.8 °C, 2015
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 11.7 °C 13.5 °C 17.3 °C, 2010 8.5 °C, 2015
Day Maximum (09-21) 22.9 °C 21.7 °C 36.2 °C, 2020 20.0 °C, 2012
Max 10m Temp Rise 0.8 °C 13:11 0.7 °C 0.8 °C, 2009 0.4 °C, 2013
Max 1hr Temp Rise 2.1 °C 15:46 1.8 °C 3.8 °C, 2015 1.8 °C, 2010
Max 1hr Hum Rise 5% 19:28 8% 15%, 2019 4%, 2016
Max 10m Temp Fall 0.7 °C 01:04 0.6 °C 0.9 °C, 2020 0.3 °C, 2010
Max 1hr Temp Fall 1.5 °C 19:09 1.5 °C 3.6 °C, 2020 1.1 °C, 2013
Max 1hr Hum Fall 9% 10:24 9% 15%, 2015 8%, 2012
Max 10m Wind Speed 3.7 mph 2.4 mph 12.2 mph, 2019 3.7 mph, 2009
Minimum Feels-like n/a 0.0 °C 19.8, 2018 8.5, 2015
Maximum Feels-like n/a 0.0 °C 41.3, 2020 21.7, 2015
Mean Feels-like n/a 0.0 °C 29.7, 2020 16.1, 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 11.2 °C (+2.4) 8.2 °C (-0.8) 19.6 °C (+10.8), 2020 6.5 °C (-2.3), 2010
Humidity Range 39% 38% 54%, 2020 24%, 2013
Pressure Range 8 hPa 6 hPa 8 hPa, 2019 2 hPa, 2010
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 7.3 [52%]165 hrs (89%) [36%] 12 [85%], 2011 0.1 [1%], 2012
Wet Hours 048 hrs (141%) [6.4%] 7, 2012 0, 2009
Cloud Cover not available
Events None
Comments -
Extra Comments
Issues None known
Observer Absent? No
Pond Temperature (Heath) 0.0 °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, Wet hrs, Cloud cover and Events are based on manual equipment/observations (entered with a delay of 1-10 days); their reliablity is questionable and they are provided for interest only.
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Daily Graph of Conditions

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Wind rose