Daily Report for 18th April 2009

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 4.3 °C (-0.6) 06:10 7.2 °C (+2.5) 12.3 °C (+7.4), 2018 3.5 °C (-1.4), 2010
Maximum Temperature 16.5 °C (+3.7) 16:05 15.2 °C (+3.1) 24.9 °C (+12.1), 2018 11.4 °C (-1.4), 2012
Mean Temperature 9.7 °C (+1.5) 10.7 °C (+2.8) 18.3 °C, 2018 8.2 °C, 2012
Minimum Humidity 45% 17:12 61% 70%, 2020 28%, 2018
Maximum Humidity 97% 07:49 93% 97%, 2009 70%, 2013
Mean Humidity 76% 79% 81%, 2012 54%, 2017
Minimum Pressure 1014 hPa 01:53 1009 hPa 1026 hPa, 2015 977 hPa, 2012
Maximum Pressure 1023 hPa 23:13 1015 hPa 1032 hPa, 2017 992 hPa, 2012
Mean Pressure 1018 hPa 1012 hPa 1029 hPa, 2017 984 hPa, 2012
Mean Wind Speed n/a (-4.9) 0.0 mph (-4.9) 10.62, 2013 2.2, 2010
Maximum Wind Speed n/a 0.0 mph 20.8, 2013 7.1, 2010
Maximum Gust n/a 0.0 mph 30.1, 2013 10, 2010
Mean Wind Direction n/a
Rainfall 0.0 mm 27.4 mm (93%) 3.4 mm, 2012
Maximum Hourly Rain n/a 1.3, 2020
Maximum 10-min Rain n/a 0.6, 2012
Maximum Rain Rate n/a 5, 2012
Minimum Dew Point 2.1 °C 20:54 4.1 °C 5.0 °C, 2018 -2.7 °C, 2017
Maximum Dew Point 9.0 °C 12:43 9.6 °C 13.4 °C, 2018 1.3 °C, 2017
Mean Dew Point 5.3 °C 6.9 °C 10.4 °C, 2018 -0.8 °C, 2017
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 4.3 °C 7.5 °C 12.3 °C, 2018 3.5 °C, 2010
Day Maximum (09-21) 16.5 °C 15.2 °C 24.9 °C, 2018 11.4 °C, 2012
Max 10m Temp Rise 1.2 °C 09:35 0.4 °C 1.2 °C, 2009 0.4 °C, 2020
Max 1hr Temp Rise 2.4 °C 10:25 1.0 °C 3.4 °C, 2011 1.5 °C, 2020
Max 1hr Hum Rise 14% 21:51 3% 24%, 2013 4%, 2016
Max 10m Temp Fall 0.6 °C 09:25 0.3 °C 2.5 °C, 2013 0.4 °C, 2015
Max 1hr Temp Fall 2.1 °C 22:13 0.7 °C 4.3 °C, 2013 1.4 °C, 2012
Max 1hr Hum Fall 12% 14:20 4% 14%, 2014 6%, 2020
Max 10m Wind Speed n/a 0.0 mph 14.9, 2013 8, 2016
Minimum Feels-like n/a 0.0 °C 13.4, 2018 0.6, 2015
Maximum Feels-like n/a 0.0 °C 26.6, 2018 11.7, 2012
Mean Feels-like n/a 0.0 °C 19.8, 2018 6.3, 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 12.2 °C (+4.3) 8.0 °C (+0.6) 16.0 °C (+8.1), 2010 5.4 °C (-2.5), 2012
Humidity Range 52% 32% 56%, 2018 20%, 2020
Pressure Range 9 hPa 6 hPa 15 hPa, 2012 3 hPa, 2015
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 10.6 [84%]84 hrs (104%) [38%] 12.7 [100%], 2018 0.5 [4%], 2020
Wet Hours 033 hrs (120%) [7.6%] 4, 2012 0, 2009
Cloud Cover not available
Events None
Comments -
Extra Comments
Issues TMax DATA CORRECTION: -0.5C from initial
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