Daily Report for 22nd February 2016

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 5.2 °C (+2.9) 23:58 4.0 °C (+1.9) 10.9 °C (+8.6), 2017 -0.8 °C (-3.1), 2015
Maximum Temperature 11.9 °C (+4.0) 00:07 9.1 °C (+1.7) 13.8 °C (+5.9), 2017 1.4 °C (-6.5), 2013
Mean Temperature 8.5 °C (+3.5) 6.8 °C (+1.8) 12.2 °C, 2017 0.6 °C, 2013
Minimum Humidity 49% 16:33 60% 94%, 2010 49%, 2014
Maximum Humidity 91% 06:47 88% 98%, 2010 66%, 2013
Mean Humidity 74% 77% 97%, 2010 57%, 2013
Minimum Pressure 1007 hPa 03:02 1002 hPa 1026 hPa, 2009 983 hPa, 2010
Maximum Pressure 1011 hPa 22:17 1013 hPa 1030 hPa, 2009 991 hPa, 2010
Mean Pressure 1009 hPa 1007 hPa 1028 hPa, 2009 987 hPa, 2010
Mean Wind Speed 4.3 mph (-0.8) 7.0 mph (+1.9) 9.5 mph, 2017 2.8 mph, 2011
Maximum Wind Speed 14.2 mph 00:15 16.7 mph 21.5 mph, 2015 8.7 mph, 2011
Maximum Gust 25.2 mph 00:05 24.9 mph 33.7 mph, 2015 10.5 mph, 2011
Mean Wind Direction NW
Rainfall 3.7 mm 38.5 mm (127%) 13.0 mm, 2010
Maximum Hourly Rain 1.9 mm 06:00 3.0 mm, 2010
Maximum 10-min Rain 0.7 mm 05:19 0.8 mm, 2010
Maximum Rain Rate 11 mm/h 05:14 18 mm/h, 2015
Minimum Dew Point -2.4 °C 17:37 -0.3 °C 7.7 °C, 2017 -8.2 °C, 2013
Maximum Dew Point 9.7 °C 03:48 5.6 °C 10.0 °C, 2012 -5.0 °C, 2013
Mean Dew Point 3.8 °C 2.8 °C 8.6 °C, 2017 -6.9 °C, 2013
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 8.4 °C * 07:54 4.9 °C 11.2 °C, 2017 -0.8 °C, 2015
Day Maximum (09-21) * 8.8 °C * 09:29 9.0 °C 13.8 °C, 2017 1.4 °C, 2013
Max 10m Temp Rise 0.2 °C 12:33 0.3 °C 1.3 °C, 2009 0.1 °C, 2010
Max 1hr Temp Rise 0.6 °C 12:51 1.2 °C 2.4 °C, 2015 0.4 °C, 2010
Max 1hr Hum Rise 3% 01:57 7% 14%, 2015 1%, 2010
Max 10m Temp Fall 0.5 °C 06:12 0.4 °C 1.3 °C, 2009 0.1 °C, 2011
Max 1hr Temp Fall 1.7 °C 06:21 1.2 °C 1.7 °C, 2016 0.3 °C, 2011
Max 1hr Hum Fall 20% 14:37 10% 20%, 2016 1%, 2010
Max 10m Wind Speed 11.9 mph 00:17 13.0 mph 16.4 mph, 2015 5.5 mph, 2011
Minimum Feels-like 2.1 °C 23:26 0.3 °C 11.6 °C, 2017 -6.3 °C, 2013
Maximum Feels-like 13.0 °C 00:00 8.0 °C 14.6 °C, 2017 -1.1 °C, 2013
Mean Feels-like 7.8 °C 4.6 °C 12.9 °C, 2017 -4.0 °C, 2013
Air-frost Hrs 0 hrs 0.2 hrs 3 hrs, 2015 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 6.7 °C (+1.1) 5.1 °C (-0.2) 10.0 °C (+4.4), 2015 1.5 °C (-4.1), 2013
Humidity Range 42% 28% 42%, 2016 4%, 2010
Pressure Range 4 hPa 11 hPa 20 hPa, 2015 2 hPa, 2018
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 1 [11%]55 hrs (94%) [28%] 7 [75%], 2014 0 [0%], 2010
Wet Hours 3
[Mean rain rate: 1.2 mm/h]
51 hrs (130%) [9.7%] 10, 2010 , 2009
Cloud Cover am: Overcast
pm: Overcast transitioned to Partly Cloudy
Events None
Comments am Rain spells
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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