Daily Report for 29th February 2016

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 1.1 °C (-1.5) 06:51 3.1 °C (+0.8) 9.5 °C (+6.9), 2012 -4.8 °C (-7.4), 2018
Maximum Temperature 7.9 °C (-0.9) 14:34 8.6 °C (+0.9) 12.6 °C (+3.8), 2012 0.0 °C (-8.8), 2018
Mean Temperature 5.0 °C (-1.2) 6.0 °C (+0.9) 10.9 °C, 2012 -2.8 °C, 2018
Minimum Humidity 49% 15:24 57% 78%, 2012 47%, 2015
Maximum Humidity 84% 07:33 86% 98%, 2014 84%, 2016
Mean Humidity 64% 74% 84%, 2014 64%, 2016
Minimum Pressure 1024 hPa 23:55 1005 hPa 1035 hPa, 2011 995 hPa, 2018
Maximum Pressure 1028 hPa 09:30 1014 hPa 1039 hPa, 2011 999 hPa, 2017
Mean Pressure 1026 hPa 1009 hPa 1037 hPa, 2011 997 hPa, 2017
Mean Wind Speed 1.8 mph (-3.3) 6.0 mph (+0.9) 12.5 mph, 2018 1.8 mph, 2016
Maximum Wind Speed 12.6 mph 23:42 15.2 mph 22.0 mph, 2018 7.6 mph, 2014
Maximum Gust 19.9 mph 23:36 22.8 mph 33.4 mph, 2018 10.2 mph, 2014
Mean Wind Direction SE
Rainfall trace 38.6 mm (97%) 4, 2017
Maximum Hourly Rain n/a 3.2, 2015
Maximum 10-min Rain n/a 2.6, 2015
Maximum Rain Rate n/a 30, 2015
Minimum Dew Point -2.7 °C 21:00 -1.5 °C 7.2 °C, 2012 -8.4 °C, 2018
Maximum Dew Point 0.5 °C 09:15 4.4 °C 10.1 °C, 2015 -3.6 °C, 2018
Mean Dew Point -1.6 °C 1.5 °C 8.2 °C, 2012 -5.8 °C, 2018
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 1.1 °C 06:51 3.9 °C 9.5 °C, 2012 -5.1 °C, 2018
Day Maximum (09-21) 7.9 °C 14:34 8.5 °C 12.6 °C, 2012 0.0 °C, 2018
Max 10m Temp Rise 0.5 °C 08:20 0.4 °C 0.6 °C, 2011 0.2 °C, 2012
Max 1hr Temp Rise 2.0 °C 08:32 1.3 °C 2.1 °C, 2010 0.4 °C, 2011
Max 1hr Hum Rise 5% 01:08 7% 21%, 2015 2%, 2012
Max 10m Temp Fall 0.2 °C 00:24 0.4 °C 0.8 °C, 2015 0.2 °C, 2012
Max 1hr Temp Fall 0.7 °C 01:14 1.2 °C 2.4 °C, 2015 0.6 °C, 2012
Max 1hr Hum Fall 10% 10:24 10% 24%, 2015 4%, 2012
Max 10m Wind Speed 10.1 mph 23:44 11.8 mph 18.1 mph, 2015 5.7 mph, 2014
Minimum Feels-like -1.1 °C 03:29 -0.2 °C 7.8 °C, 2012 -14.2 °C, 2018
Maximum Feels-like 7.8 °C 14:12 7.6 °C 13.3 °C, 2012 -5.7 °C, 2018
Mean Feels-like 4.0 °C 3.9 °C 11.0 °C, 2012 -10.1 °C, 2018
Air-frost Hrs 0 hrs 0.9 hrs 24 hrs, 2018 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 6.8 °C (+0.6) 5.5 °C (+0.1) 9.5 °C (+3.3), 2010 1.9 °C (-4.3), 2011
Humidity Range 35% 29% 49%, 2015 13%, 2011
Pressure Range 4 hPa 10 hPa 15 hPa, 2018 2 hPa, 2012
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 5 [51%]80 hrs (102%) [31%] 7 [72%], 2010 0 [0%], 2011
Wet Hours 0.552 hrs (99%) [7.4%] 5, 2018 , 2009
Cloud Cover am: Mostly Sunny
pm: Hazy transitioned to Overcast
Events None
Comments late eve Slight Rain
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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Webcam Summary of Cloud Conditions

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