Daily Report for 11th December 2009

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 2.1 °C (-1.2) 04:18 4.6 °C (+1.1) 6.0 °C (+2.6), 2015 -3.4 °C (-6.8), 2012
Maximum Temperature 6.5 °C (-1.7) 14:00 9.5 °C (+1.0) 10.4 °C (+2.2), 2015 1.7 °C (-6.5), 2012
Mean Temperature 4.2 °C (-1.5) 7.1 °C (+1.0) 9.1 °C, 2015 -0.6 °C, 2012
Minimum Humidity 96% 01:23 81% 96%, 2009 65%, 2014
Maximum Humidity 98% 13:58 97% 98%, 2009 79%, 2016
Mean Humidity 98% 90% 98%, 2009 77%, 2014
Minimum Pressure 1032 hPa 10:22 1003 hPa 1032 hPa, 2009 978 hPa, 2017
Maximum Pressure 1034 hPa 09:29 1012 hPa 1034 hPa, 2009 998 hPa, 2017
Mean Pressure 1033 hPa 1008 hPa 1033 hPa, 2009 985 hPa, 2017
Mean Wind Speed 3.5 mph (-1.6) 4.7 mph (-0.4) 8.7 mph, 2014 0.6 mph, 2013
Maximum Wind Speed 8.7 mph 10.4 mph 18.1 mph, 2014 4.0 mph, 2013
Maximum Gust 10.9 mph 14:45 15.9 mph 25.3 mph, 2014 5.9 mph, 2013
Mean Wind Direction N
Rainfall 0.0 mm 32.7 mm (165%) 16.1 mm, 2017
Maximum Hourly Rain n/a 5.3, 2011
Maximum 10-min Rain n/a 2, 2011
Maximum Rain Rate n/a 24, 2015
Minimum Dew Point 1.8 °C 03:31 3.0 °C 3.5 °C, 2015 -4.2 °C, 2012
Maximum Dew Point 6.2 °C 14:00 8.6 °C 8.5 °C, 2015 0.1 °C, 2012
Mean Dew Point 3.9 °C 5.7 °C 6.7 °C, 2015 -1.7 °C, 2012
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 2.1 °C 5.6 °C 9.5 °C, 2015 -1.2 °C, 2012
Day Maximum (09-21) 6.5 °C 9.1 °C 10.4 °C, 2015 1.7 °C, 2012
Max 10m Temp Rise 0.6 °C 12:04 0.4 °C 0.6 °C, 2009 0.1 °C, 2015
Max 1hr Temp Rise 1.2 °C 12:51 1.0 °C 2.1 °C, 2018 0.4 °C, 2015
Max 1hr Hum Rise 1% 01:49 4% 9%, 2014 1%, 2009
Max 10m Temp Fall 0.3 °C 11:54 0.4 °C 0.6 °C, 2014 0.2 °C, 2016
Max 1hr Temp Fall 0.8 °C 15:47 0.9 °C 1.7 °C, 2012 0.7 °C, 2016
Max 1hr Hum Fall 1% 02:43 7% 12%, 2014 0%, 2013
Max 10m Wind Speed 6.0 mph 15:03 8.2 mph 13.0 mph, 2014 3.0 mph, 2013
Minimum Feels-like -0.1 °C 04:34 1.8 °C 3.1 °C, 2015 -6.8 °C, 2017
Maximum Feels-like 6.5 °C 13:48 10.3 °C 10.6 °C, 2015 -0.9 °C, 2017
Mean Feels-like 3.4 °C 6.5 °C 7.5 °C, 2015 -3.5 °C, 2017
Air-frost Hrs 0 hrs 0 hrs 14 hrs, 2012 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 4.4 °C (-0.4) 5.0 °C (-0.1) 7.2 °C (+2.4), 2018 3.1 °C (-1.8), 2017
Humidity Range 2% 16% 21%, 2014 2%, 2009
Pressure Range 2 hPa 9 hPa 20 hPa, 2017 2 hPa, 2009
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 2 [28%]30 hrs (171%) [37%] 7 [99%], 2012 0 [0%], 2011
Wet Hours 031 hrs (139%) [12%] 13, 2017 0, 2009
Cloud Cover not available
Events Dense Fog
Comments am Dense Fog
Extra Comments 11th/12th: RHeavy at 98% from 04z on 11th - 11z on 12th
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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