Daily Report for 30th July 2009

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 11.6 °C (-2.3) 05:34 13.5 °C (+0.2) 17.7 °C (+3.8), 2018 9.1 °C (-4.8), 2011
Maximum Temperature 19.3 °C (-3.4) 16:03 21.7 °C (-0.8) 29.2 °C (+6.5), 2020 18.7 °C (-4.0), 2015
Mean Temperature 15.3 °C (-2.8) 17.0 °C (-0.3) 22.0 °C, 2020 15.2 °C, 2015
Minimum Humidity 47% 18:46 53% 72%, 2013 31%, 2020
Maximum Humidity 95% 06:41 91% 95%, 2009 73%, 2014
Mean Humidity 73% 74% 85%, 2013 54%, 2020
Minimum Pressure 1011 hPa 00:15 1009 hPa 1018 hPa, 2011 1004 hPa, 2017
Maximum Pressure 1023 hPa 23:24 1015 hPa 1025 hPa, 2011 1008 hPa, 2019
Mean Pressure 1017 hPa 1012 hPa 1022 hPa, 2011 1006 hPa, 2019
Mean Wind Speed n/a (-4.3) 0.0 mph (-4.3) 7.6, 2019 2.7, 2011
Maximum Wind Speed n/a 0.0 mph 19.9, 2019 7.4, 2011
Maximum Gust n/a 0.0 mph 36.9, 2019 10.7, 2011
Mean Wind Direction n/a
Rainfall 1.1 mm 55.4 mm (136%) 17.8 mm, 2017
Maximum Hourly Rain 1.1 mm 12:14 16.0 mm, 2017
Maximum 10-min Rain 0.9 mm 12:02 5.1 mm, 2017
Maximum Rain Rate 16 mm/h 11:56 50 mm/h, 2017
Minimum Dew Point 6.5 °C 18:58 9.5 °C 13.1 °C, 2013 2.5 °C, 2012
Maximum Dew Point 12.9 °C 08:53 14.6 °C 18.6 °C, 2013 8.9 °C, 2015
Mean Dew Point 10.0 °C 12.1 °C 15.4 °C, 2018 6.2 °C, 2012
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 11.6 °C 13.6 °C 18.2 °C, 2019 9.1 °C, 2011
Day Maximum (09-21) 19.3 °C 21.7 °C 29.2 °C, 2020 18.7 °C, 2015
Max 10m Temp Rise n/a 12:50 0.7 °C 1, 2011 0.4, 2016
Max 1hr Temp Rise n/a 15:05 1.8 °C 4.5, 2011 1.4, 2013
Max 1hr Hum Rise n/a 23:59 8% 19, 2020 5, 2013
Max 10m Temp Fall n/a 23:38 0.6 °C 0.7, 2019 0.3, 2010
Max 1hr Temp Fall n/a 23:59 1.5 °C 3, 2020 1.2, 2010
Max 1hr Hum Fall n/a 10:42 9% 17, 2018 8, 2013
Max 10m Wind Speed 4.6 mph 2.3 mph 13.1 mph, 2018 4.6 mph, 2009
Minimum Feels-like n/a 0.0 °C 20.7, 2018 8.2, 2011
Maximum Feels-like n/a 0.0 °C 31, 2020 18.8, 2015
Mean Feels-like n/a 0.0 °C 24.2, 2018 15.4, 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 7.7 °C (-1.1) 8.1 °C (-0.9) 16.6 °C (+7.8), 2020 3.5 °C (-5.3), 2019
Humidity Range 48% 38% 56%, 2020 23%, 2013
Pressure Range 12 hPa 6 hPa 12 hPa, 2009 2 hPa, 2012
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 8.7 [61%]158 hrs (88%) [36%] 14.2 [100%], 2020 0.4 [3%], 2016
Wet Hours 0.5
[Mean rain rate: 2.2 mm/h]
48 hrs (145%) [6.6%] 8, 2019 0, 2011
Cloud Cover not available
Events None
Comments VHeavy 12, Light 1630 Showers
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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Webcam Summary of Cloud Conditions


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Wind rose