Daily Report for 21st September 2009

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 11.1 °C (+0.3) 07:35 12.1 °C (+0.6) 14.0 °C (+3.2), 2016 9.5 °C (-1.3), 2010
Maximum Temperature 20.3 °C (+2.4) 15:24 19.4 °C (-0.0) 22.4 °C (+4.5), 2019 15.2 °C (-2.7), 2015
Mean Temperature 15.1 °C (+1.4) 15.3 °C (+0.3) 17.5 °C, 2016 13.1 °C, 2012
Minimum Humidity 44% 16:26 56% 79%, 2013 44%, 2009
Maximum Humidity 91% 04:02 90% 95%, 2010 82%, 2019
Mean Humidity 70% 74% 87%, 2015 65%, 2019
Minimum Pressure 1024 hPa 19:49 1017 hPa 1024 hPa, 2009 997 hPa, 2018
Maximum Pressure 1027 hPa 10:30 1024 hPa 1027 hPa, 2009 1018 hPa, 2011
Mean Pressure 1026 hPa 1020 hPa 1026 hPa, 2009 1008 hPa, 2018
Mean Wind Speed 4.0 mph (+0.1) 5.5 mph (+1.6) 10.6 mph, 2018 2.2 mph, 2010
Maximum Wind Speed 10.1 mph 12.7 mph 26.7 mph, 2018 8.5 mph, 2012
Maximum Gust 15.4 mph 15:07 19.3 mph 38.0 mph, 2018 12.3 mph, 2010
Mean Wind Direction SW
Rainfall 0.0 mm 35.9 mm (90%) 4.8 mm, 2015
Maximum Hourly Rain n/a 2.4, 2018
Maximum 10-min Rain n/a 1.3, 2018
Maximum Rain Rate n/a 26, 2018
Minimum Dew Point 6.5 °C 17:24 7.9 °C 10.8 °C, 2016 5.8 °C, 2018
Maximum Dew Point 11.4 °C 00:14 13.0 °C 16.1 °C, 2018 9.5 °C, 2012
Mean Dew Point 9.2 °C 10.4 °C 12.2 °C, 2017 7.6 °C, 2012
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 11.1 °C 12.3 °C 14.2 °C, 2017 9.5 °C, 2010
Day Maximum (09-21) 20.3 °C 19.4 °C 22.4 °C, 2019 15.2 °C, 2015
Max 10m Temp Rise n/a 13:21 0.2 °C 0.8, 2010 0.2, 2015
Max 1hr Temp Rise n/a 14:09 0.4 °C 3.5, 2010 0.5, 2015
Max 1hr Hum Rise n/a 13:13 3% 19, 2012 4, 2013
Max 10m Temp Fall n/a 13:14 0.2 °C 1.6, 2018 0.2, 2015
Max 1hr Temp Fall n/a 02:01 0.4 °C 3.5, 2018 1, 2015
Max 1hr Hum Fall n/a 14:09 3% 16, 2016 4, 2013
Max 10m Wind Speed 7.7 mph 15:11 9.0 mph 18.4 mph, 2018 6.0 mph, 2012
Minimum Feels-like 11.9 °C 07:24 12.9 °C 15.7 °C, 2016 8.7 °C, 2013
Maximum Feels-like 20.8 °C 15:23 21.5 °C 24.7 °C, 2019 16.5 °C, 2012
Mean Feels-like 15.9 °C 16.8 °C 19.9 °C, 2016 13.4 °C, 2012
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 9.2 °C (+2.1) 7.3 °C (-0.7) 11.8 °C (+4.7), 2010 3.9 °C (-3.2), 2015
Humidity Range 47% 34% 47%, 2009 15%, 2013
Pressure Range 3 hPa 6 hPa 22 hPa, 2018 2 hPa, 2011
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 5 [45%]84 hrs (85%) [34%] 11.2 [101%], 2019 0 [0%], 2015
Wet Hours 017 hrs (60%) [3.4%] 4, 2015 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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