Daily Report for 1st May 2009

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 7.9 °C (+1.8) 06:22 7.9 °C (+1.7) 10.8 °C (+4.7), 2012 1.5 °C (-4.6), 2016
Maximum Temperature 21.0 °C (+6.3) 14:54 21.0 °C (+6.2) 21.0 °C (+6.3), 2009 12.7 °C (-2.0), 2017
Mean Temperature 14.1 °C (+4.0) 14.1 °C (+3.9) 14.1 °C, 2009 8.6 °C, 2015
Minimum Humidity 40% 19:29 40% 72%, 2014 33%, 2016
Maximum Humidity 94% 08:15 94% 97%, 2012 66%, 2011
Mean Humidity 68% 68% 90%, 2014 52%, 2011
Minimum Pressure 1021 hPa 01:42 1021 hPa 1026 hPa, 2016 997 hPa, 2020
Maximum Pressure 1025 hPa 22:25 1025 hPa 1029 hPa, 2016 1006 hPa, 2020
Mean Pressure 1023 hPa 1023 hPa 1027 hPa, 2016 1000 hPa, 2020
Mean Wind Speed n/a (-4.7) 0.0 mph (-4.7) 9.2, 2011 1.6, 2014
Maximum Wind Speed n/a 0.0 mph 18.5, 2011 8.5, 2014
Maximum Gust n/a 0.0 mph 27.3, 2011 12.3, 2014
Mean Wind Direction n/a
Rainfall 0.0 mm 0.0 mm (0%) 31.7 mm, 2010
Maximum Hourly Rain n/a 13.1, 2010
Maximum 10-min Rain n/a 4.1, 2010
Maximum Rain Rate n/a 60, 2010
Minimum Dew Point 2.9 °C 19:30 2.9 °C 8.2 °C, 2012 -2.7 °C, 2013
Maximum Dew Point 11.0 °C 10:54 11.0 °C 13.6 °C, 2012 2.8 °C, 2015
Mean Dew Point 7.8 °C 7.8 °C 10.7 °C, 2012 0.8 °C, 2013
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 7.9 °C 7.9 °C 10.8 °C, 2012 1.5 °C, 2016
Day Maximum (09-21) 21.0 °C 21.0 °C 21.0 °C, 2009 12.7 °C, 2017
Max 10m Temp Rise 1.6 °C 09:17 1.6 °C 1.6 °C, 2009 0.3 °C, 2014
Max 1hr Temp Rise 3.5 °C 10:09 3.5 °C 4.5 °C, 2016 0.7 °C, 2014
Max 1hr Hum Rise 13% 20:55 13% 18%, 2020 4%, 2014
Max 10m Temp Fall 0.9 °C 09:09 0.9 °C 2.4 °C, 2020 0.3 °C, 2014
Max 1hr Temp Fall 1.6 °C 18:16 1.6 °C 3.3 °C, 2020 0.7 °C, 2014
Max 1hr Hum Fall 15% 10:07 15% 22%, 2013 3%, 2014
Max 10m Wind Speed n/a 0.0 mph 13, 2018 6.2, 2014
Minimum Feels-like n/a 0.0 °C 12.2, 2012 -0.9, 2018
Maximum Feels-like n/a 0.0 °C 19.2, 2012 13, 2017
Mean Feels-like n/a 0.0 °C 14.8, 2012 7.3, 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 13.1 °C (+4.5) 13.1 °C (+4.5) 15.3 °C (+6.7), 2016 3.2 °C (-5.4), 2014
Humidity Range 54% 54% 56%, 2013 17%, 2017
Pressure Range 4 hPa 4 hPa 16 hPa, 2017 2 hPa, 2010
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 10.2 [76%]10 hrs (176%) [76%] 11 [82%], 2011 0 [0%], 2014
Wet Hours 00 hrs (0%) [0%] 13, 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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Wind rose