Daily Report for 12th May 2009

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 6.1 °C (-1.5) 02:58 7.8 °C (+0.8) 12.6 °C (+5.0), 2017 1.0 °C (-6.6), 2010
Maximum Temperature 16.9 °C (+0.8) 16:01 17.6 °C (+2.0) 18.8 °C (+2.7), 2017 11.4 °C (-4.7), 2010
Mean Temperature 11.3 °C (-0.3) 12.3 °C (+1.4) 17.8 °C, 2016 6.9 °C, 2010
Minimum Humidity 34% 14:36 43% 63%, 2018 34%, 2009
Maximum Humidity 74% 08:13 82% 94%, 2016 74%, 2009
Mean Humidity 60% 64% 81%, 2018 52%, 2015
Minimum Pressure 1018 hPa 22:00 1018 hPa 1033 hPa, 2012 993 hPa, 2017
Maximum Pressure 1023 hPa 02:10 1022 hPa 1040 hPa, 2019 1002 hPa, 2017
Mean Pressure 1020 hPa 1020 hPa 1036 hPa, 2019 996 hPa, 2017
Mean Wind Speed n/a (-4.7) 0.0 mph (-4.7) 7.1, 2015 1.9, 2020
Maximum Wind Speed n/a 0.0 mph 17.8, 2015 7.6, 2010
Maximum Gust n/a 0.0 mph 27.5, 2015 10.9, 2010
Mean Wind Direction n/a
Rainfall 0.0 mm 1.3 mm (7%) 7.3 mm, 2018
Maximum Hourly Rain n/a 2.6, 2018
Maximum 10-min Rain n/a 1.9, 2014
Maximum Rain Rate n/a 54, 2014
Minimum Dew Point 0.9 °C 00:22 2.3 °C 10.4 °C, 2016 -2.2 °C, 2010
Maximum Dew Point 7.3 °C 11:28 8.3 °C 14.9 °C, 2016 2.8 °C, 2010
Mean Dew Point 3.4 °C 5.4 °C 12.6 °C, 2016 0.1 °C, 2010
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 6.1 °C 7.9 °C 12.6 °C, 2017 1.0 °C, 2010
Day Maximum (09-21) 16.9 °C 17.6 °C 23.8 °C, 2016 11.4 °C, 2010
Max 10m Temp Rise 0.5 °C 09:49 0.8 °C 0.9 °C, 2019 0.4 °C, 2018
Max 1hr Temp Rise 2.1 °C 10:11 2.5 °C 4.5 °C, 2019 1.1 °C, 2018
Max 1hr Hum Rise 6% 17:32 8% 18%, 2013 6%, 2009
Max 10m Temp Fall 0.4 °C 17:08 0.5 °C 1.1 °C, 2014 0.4 °C, 2009
Max 1hr Temp Fall 1.6 °C 17:53 1.7 °C 3.1 °C, 2016 1.3 °C, 2018
Max 1hr Hum Fall 15% 12:27 14% 22%, 2019 8%, 2018
Max 10m Wind Speed n/a 0.0 mph 14.9, 2015 5.4, 2020
Minimum Feels-like n/a 0.0 °C 14.1, 2016 -1, 2010
Maximum Feels-like n/a 0.0 °C 26.5, 2016 11.4, 2010
Mean Feels-like n/a 0.0 °C 20.4, 2016 6.0, 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 10.8 °C (+2.3) 9.8 °C (+1.3) 14.1 °C (+5.6), 2020 1.4 °C (-7.1), 2016
Humidity Range 40% 40% 58%, 2019 27%, 2017
Pressure Range 5 hPa 4 hPa 9 hPa, 2019 2 hPa, 2018
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 7.3 [52%]79 hrs (112%) [48%] 12 [86%], 2016 0.2 [1%], 2018
Wet Hours 02.8 hrs (18%) [1%] 8, 2018 0, 2009
Cloud Cover not available
Events None
Comments -
Extra Comments
Issues Tmax corrected as unreliable
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