Daily Report for 21st April 2009

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 4.9 °C (-0.1) 06:14 6.8 °C (+2.0) 11.6 °C (+6.6), 2011 0.2 °C (-4.8), 2013
Maximum Temperature 20.5 °C (+7.4) 16:30 15.8 °C (+3.5) 24.4 °C (+11.3), 2011 13.8 °C (+0.7), 2010
Mean Temperature 12.6 °C (+3.6) 10.7 °C (+2.7) 17.5 °C, 2011 7.9 °C, 2010
Minimum Humidity 34% 18:14 59% 55%, 2018 29%, 2019
Maximum Humidity 90% 08:25 93% 98%, 2014 66%, 2011
Mean Humidity 63% 78% 74%, 2014 48%, 2011
Minimum Pressure 1024 hPa 16:47 1011 hPa 1032 hPa, 2015 994 hPa, 2012
Maximum Pressure 1027 hPa 06:17 1017 hPa 1034 hPa, 2015 1002 hPa, 2012
Mean Pressure 1026 hPa 1014 hPa 1033 hPa, 2015 998 hPa, 2012
Mean Wind Speed n/a (-4.9) 0.0 mph (-4.9) 7.9, 2020 2.1, 2014
Maximum Wind Speed n/a 0.0 mph 18, 2020 9.4, 2010
Maximum Gust n/a 0.0 mph 30, 2020 12.7, 2018
Mean Wind Direction n/a
Rainfall 0.0 mm 27.4 mm (80%) 4.4 mm, 2014
Maximum Hourly Rain n/a 2.2, 2014
Maximum 10-min Rain n/a 0.9, 2014
Maximum Rain Rate n/a 10.8, 2014
Minimum Dew Point 2.5 °C 03:42 3.8 °C 8.7 °C, 2018 -3.7 °C, 2010
Maximum Dew Point 8.5 °C 12:02 9.5 °C 14.1 °C, 2018 0.7 °C, 2010
Mean Dew Point 5.0 °C 6.7 °C 11.2 °C, 2018 -1.6 °C, 2010
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 4.9 °C 7.0 °C 11.6 °C, 2011 0.2 °C, 2013
Day Maximum (09-21) 20.5 °C 15.8 °C 24.4 °C, 2011 13.8 °C, 2010
Max 10m Temp Rise 1.1 °C 09:49 0.4 °C 1.4 °C, 2013 0.4 °C, 2017
Max 1hr Temp Rise 3.6 °C 10:38 1.3 °C 5.7 °C, 2013 1.3 °C, 2017
Max 1hr Hum Rise 8% 20:25 3% 20%, 2014 4%, 2017
Max 10m Temp Fall 0.4 °C 19:12 0.3 °C 0.9 °C, 2012 0.3 °C, 2019
Max 1hr Temp Fall 1.7 °C 19:54 0.9 °C 2.9 °C, 2014 1.5 °C, 2017
Max 1hr Hum Fall 13% 10:14 5% 25%, 2014 8%, 2010
Max 10m Wind Speed n/a 0.0 mph 13.3, 2020 6.9, 2018
Minimum Feels-like n/a 0.0 °C 11.7, 2018 -0.9, 2013
Maximum Feels-like n/a 0.0 °C 26.2, 2018 14.0, 2010
Mean Feels-like n/a 0.0 °C 18.8, 2018 6.4, 2010
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 15.6 °C (+7.5) 9.0 °C (+1.4) 16.2 °C (+8.1), 2019 6.0 °C (-2.1), 2017
Humidity Range 56% 34% 58%, 2014 26%, 2017
Pressure Range 3 hPa 6 hPa 14 hPa, 2019 2 hPa, 2010
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 11.3 [88%]114 hrs (121%) [44%] 13 [101%], 2019 0 [0%], 2017
Wet Hours 033 hrs (102%) [6.5%] 4, 2014 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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