Daily Report for 13th February 2016

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 1.4 °C (-0.5) 03:24 4.5 °C (+2.3) 5.6 °C (+3.7), 2011 0.4 °C (-1.5), 2009
Maximum Temperature 4.7 °C (-2.5) 14:46 9.2 °C (+2.0) 9.1 °C (+1.9), 2015 3.2 °C (-4.0), 2010
Mean Temperature 3.5 °C (-1.5) 7.2 °C (+2.2) 7.4 °C, 2011 1.7 °C, 2010
Minimum Humidity 83% 10:53 62% 83%, 2016 51%, 2014
Maximum Humidity 92% 22:35 86% 98%, 2009 76%, 2014
Mean Humidity 88% 76% 92%, 2012 65%, 2014
Minimum Pressure 983 hPa 14:06 998 hPa 1023 hPa, 2012 983 hPa, 2016
Maximum Pressure 993 hPa 00:15 1008 hPa 1034 hPa, 2012 993 hPa, 2016
Mean Pressure 986 hPa 1002 hPa 1028 hPa, 2012 986 hPa, 2016
Mean Wind Speed 4.1 mph (-1.0) 7.6 mph (+2.5) 7.7 mph, 2014 4.1 mph, 2012
Maximum Wind Speed 12.0 mph 00:00 18.1 mph 19.2 mph, 2015 12.0 mph, 2016
Maximum Gust 17.0 mph 00:00 26.0 mph 33.4 mph, 2018 17.0 mph, 2016
Mean Wind Direction ENE
Rainfall 2.1 mm 22.3 mm (124%) 4.1 mm, 2015
Maximum Hourly Rain 0.6 mm 13:17 2.0 mm, 2009
Maximum 10-min Rain 0.3 mm 21:31 0.5 mm, 2012
Maximum Rain Rate 0.7 mm/h 19:49 2.2 mm/h, 2015
Minimum Dew Point -0.4 °C 03:24 0.2 °C 3.3 °C, 2011 -6.2 °C, 2013
Maximum Dew Point 2.6 °C 17:51 5.6 °C 7.1 °C, 2011 0.7 °C, 2010
Mean Dew Point 1.6 °C 3.1 °C 5.4 °C, 2011 -3.0 °C, 2013
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 1.4 °C 03:24 5.5 °C 5.6 °C, 2011 0.4 °C, 2009
Day Maximum (09-21) 4.7 °C 14:46 9.2 °C 9.1 °C, 2015 2.5 °C, 2013
Max 10m Temp Rise 0.2 °C 08:47 0.3 °C 0.5 °C, 2012 0.1 °C, 2011
Max 1hr Temp Rise 0.6 °C 06:34 1.1 °C 1.6 °C, 2017 0.5 °C, 2011
Max 1hr Hum Rise 3% 11:44 7% 9%, 2012 3%, 2011
Max 10m Temp Fall 0.3 °C 00:24 0.4 °C 0.5 °C, 2018 0.1 °C, 2013
Max 1hr Temp Fall 0.9 °C 01:01 1.2 °C 1.4 °C, 2017 0.3 °C, 2013
Max 1hr Hum Fall 4% 10:01 8% 15%, 2012 3%, 2011
Max 10m Wind Speed 10.5 mph 00:10 13.8 mph 14.6 mph, 2018 7.8 mph, 2010
Minimum Feels-like -3.1 °C 03:22 0.2 °C 2.2 °C, 2011 -4.8 °C, 2010
Maximum Feels-like 1.1 °C 14:37 8.0 °C 7.7 °C, 2011 1.1 °C, 2016
Mean Feels-like -0.5 °C 4.8 °C 4.8 °C, 2011 -1.5 °C, 2013
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 3.3 °C (-2.0) 4.7 °C (-0.3) 6.6 °C (+1.3), 2015 2.8 °C (-2.5), 2018
Humidity Range 9% 24% 35%, 2009 9%, 2016
Pressure Range 10 hPa 10 hPa 17 hPa, 2015 3 hPa, 2017
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0 [0%]24 hrs (71%) [21%] 7 [80%], 2017 0 [0%], 2011
Wet Hours 12
[Mean rain rate: 0.2 mm/h]
28 hrs (121%) [9%] 12, 2016 , 2009
Cloud Cover Overcast
Events None
Comments Rain/Drizzle spells throughout
Extra Comments
Issues No wind data all day; corrected using Harpenden
Observer Absent? Yes - observations may be unreliable
Notes
Times of extremes are computed using the midpoint time of the extremum (if the value persisted for >1 minute).
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; their reliablity is questionable and they are provided for interest only.
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Daily Graph of Conditions

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Webcam Summary of Cloud Conditions

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