Daily Report for 22nd December 2009

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature -2.3 °C (-5.3) 23:58 1.8 °C (-1.5) 11.6 °C (+8.6), 2014 -2.3 °C (-5.3), 2009
Maximum Temperature 1.3 °C (-6.1) 15:07 6.2 °C (-1.9) 14.9 °C (+7.5), 2015 1.3 °C (-6.1), 2009
Mean Temperature 0.0 °C (-5.7) 4.1 °C (-1.7) 13.5 °C, 2015 0.0 °C, 2009
Minimum Humidity 96% 16:35 82% 96%, 2009 59%, 2013
Maximum Humidity 98% 12:00 97% 98%, 2009 83%, 2016
Mean Humidity 98% 91% 98%, 2009 74%, 2013
Minimum Pressure 983 hPa 03:21 1005 hPa 1034 hPa, 2017 974 hPa, 2019
Maximum Pressure 990 hPa 23:14 1013 hPa 1037 hPa, 2017 990 hPa, 2009
Mean Pressure 986 hPa 1009 hPa 1036 hPa, 2017 986 hPa, 2019
Mean Wind Speed 2.9 mph (-2.2) 4.5 mph (-0.6) 11.9 mph, 2015 2.9 mph, 2009
Maximum Wind Speed 9.2 mph 11.0 mph 23.5 mph, 2015 8.8 mph, 2016
Maximum Gust 14.8 mph 10:14 16.3 mph 43.4 mph, 2015 12.6 mph, 2016
Mean Wind Direction W
Rainfall 0.0 mm 50.0 mm (126%) 17.8 mm, 2012
Maximum Hourly Rain n/a 01:20 4.5, 2015
Maximum 10-min Rain n/a 01:20 2.7, 2015
Maximum Rain Rate n/a 126, 2015
Minimum Dew Point -2.6 °C 23:58 0.2 °C 9.0 °C, 2015 -2.6 °C, 2009
Maximum Dew Point 1.0 °C 14:58 5.4 °C 12.6 °C, 2012 0.9 °C, 2010
Mean Dew Point -0.3 °C 2.7 °C 11.1 °C, 2015 -0.3 °C, 2009
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * -0.3 °C * 2.6 °C 11.2 °C, 2014 -0.3 °C, 2009
Day Maximum (09-21) 1.3 °C 6.0 °C 14.9 °C, 2015 1.3 °C, 2009
Max 10m Temp Rise 0.3 °C 14:34 0.4 °C 0.4 °C, 2016 0.1 °C, 2010
Max 1hr Temp Rise 0.5 °C 13:56 1.0 °C 1.8 °C, 2016 0.2 °C, 2010
Max 1hr Hum Rise 1% 17:26 4% 8%, 2013 1%, 2009
Max 10m Temp Fall 0.3 °C 20:53 0.4 °C 0.7 °C, 2013 0.1 °C, 2012
Max 1hr Temp Fall 0.9 °C 21:15 0.9 °C 1.9 °C, 2016 0.3 °C, 2012
Max 1hr Hum Fall 2% 15:54 6% 12%, 2013 1%, 2012
Max 10m Wind Speed 7.6 mph 12:17 7.8 mph 18.1 mph, 2015 6.9 mph, 2016
Minimum Feels-like -5.1 °C 10:14 -1.5 °C 11.9 °C, 2015 -5.3 °C, 2010
Maximum Feels-like 1.3 °C 14:59 6.7 °C 16.8 °C, 2015 1.1 °C, 2010
Mean Feels-like -1.0 °C 3.0 °C 15.3 °C, 2015 -1.3 °C, 2010
Air-frost Hrs 8 hrs 4 hrs 8 hrs, 2009 0 hrs, 2011
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 3.6 °C (-0.8) 4.4 °C (-0.4) 6.3 °C (+1.9), 2012 1.5 °C (-2.9), 2010
Humidity Range 2% 15% 25%, 2013 2%, 2009
Pressure Range 7 hPa 8 hPa 24 hPa, 2019 3 hPa, 2011
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 3 [43%]62 hrs (182%) [40%] 6.5 [93%], 2011 0 [0%], 2010
Wet Hours 059 hrs (133%) [11%] 16, 2012 0, 2009
Cloud Cover not available
Events Lying Snow (at 09z): ~6 cm
Air Frost
Comments Lying Snow: 6cm
Extra Comments 22nd-25th: RHeavy at 98% from 20z on 22nd to 12z on 25th (64 hrs)
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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