Daily Report for 21st February 2016

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 11.4 °C (+9.2) 05:29 4.0 °C (+1.9) 11.4 °C (+9.2), 2016 -1.2 °C (-3.4), 2010
Maximum Temperature 14.5 °C (+6.8) 16:00 9.0 °C (+1.6) 14.5 °C (+6.8), 2016 1.8 °C (-6.0), 2013
Mean Temperature 12.8 °C (+8.0) 6.7 °C (+1.8) 12.8 °C, 2016 1.2 °C, 2013
Minimum Humidity 78% 16:52 61% 84%, 2011 49%, 2014
Maximum Humidity 90% 06:54 88% 98%, 2010 63%, 2013
Mean Humidity 83% 77% 92%, 2010 55%, 2013
Minimum Pressure 1007 hPa 22:00 1002 hPa 1030 hPa, 2009 991 hPa, 2010
Maximum Pressure 1011 hPa 06:15 1013 hPa 1033 hPa, 2009 998 hPa, 2010
Mean Pressure 1009 hPa 1007 hPa 1032 hPa, 2009 994 hPa, 2010
Mean Wind Speed 12.4 mph (+7.3) 7.1 mph (+2.0) 12.4 mph, 2016 2.7 mph, 2010
Maximum Wind Speed 22.7 mph 13:27 16.8 mph 22.7 mph, 2016 9.4 mph, 2011
Maximum Gust 36.7 mph 14:42 24.8 mph 36.7 mph, 2016 13.5 mph, 2010
Mean Wind Direction W
Rainfall 0.0 mm 34.8 mm (120%) 4.4 mm, 2010
Maximum Hourly Rain n/a 1.9, 2010
Maximum 10-min Rain n/a 0.8, 2010
Maximum Rain Rate n/a 16, 2010
Minimum Dew Point 9.1 °C 21:01 -0.2 °C 9.1 °C, 2016 -8.4 °C, 2013
Maximum Dew Point 11.0 °C 15:23 5.4 °C 11.0 °C, 2016 -4.5 °C, 2013
Mean Dew Point 9.9 °C 2.7 °C 9.9 °C, 2016 -6.9 °C, 2013
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 11.4 °C 05:29 4.7 °C 11.4 °C, 2016 -1.2 °C, 2010
Day Maximum (09-21) 14.5 °C 16:00 9.0 °C 14.5 °C, 2016 1.7 °C, 2013
Max 10m Temp Rise 0.2 °C 07:50 0.3 °C 0.9 °C, 2009 0.1 °C, 2013
Max 1hr Temp Rise 0.7 °C 12:50 1.2 °C 2.3 °C, 2009 0.2 °C, 2013
Max 1hr Hum Rise 3% 03:23 7% 9%, 2009 2%, 2017
Max 10m Temp Fall 0.2 °C 03:05 0.4 °C 0.9 °C, 2009 0.1 °C, 2011
Max 1hr Temp Fall 0.7 °C 18:41 1.2 °C 2.0 °C, 2009 0.4 °C, 2011
Max 1hr Hum Fall 4% 13:32 9% 15%, 2015 2%, 2011
Max 10m Wind Speed 17.6 mph 13:52 13.1 mph 17.6 mph, 2016 6.6 mph, 2011
Minimum Feels-like 12.3 °C 04:03 0.2 °C 12.3 °C, 2016 -6.1 °C, 2013
Maximum Feels-like 16.2 °C 15:06 7.8 °C 16.2 °C, 2016 0.2 °C, 2013
Mean Feels-like 14.0 °C 4.5 °C 14.0 °C, 2016 -3.2 °C, 2013
Air-frost Hrs 0 hrs 0.2 hrs 5 hrs, 2010 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 3.1 °C (-2.5) 5.0 °C (-0.2) 9.6 °C (+4.0), 2009 1.3 °C (-4.3), 2013
Humidity Range 12% 27% 40%, 2014 9%, 2011
Pressure Range 4 hPa 11 hPa 10 hPa, 2019 2 hPa, 2012
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0.1 [1%]54 hrs (97%) [29%] 8.6 [93%], 2009 0 [0%], 2011
Wet Hours 048 hrs (128%) [9.5%] 3, 2010 , 2009
Cloud Cover Overcast
Events None
Comments -
Extra Comments
Issues Wind data from Harpenden
Observer Absent? Yes - observations may be unreliable
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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