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 9 hPa, 2015 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 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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