Daily Report for 21st December 2016

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 5.1 °C (+2.1) 00:07 5.6 °C (+2.3) 9.8 °C (+6.8), 2017 -2.9 °C (-5.9), 2009
Maximum Temperature 12.1 °C (+4.7) 14:23 10.5 °C (+2.4) 12.9 °C (+5.5), 2015 1.4 °C (-6.0), 2010
Mean Temperature 9.6 °C (+3.4) 8.3 °C (+2.3) 10.7 °C, 2017 -0.5 °C, 2009
Minimum Humidity 73% 15:25 73% 93%, 2010 73%, 2016
Maximum Humidity 83% 03:55 81% 98%, 2009 83%, 2016
Mean Humidity 79% 78% 96%, 2010 79%, 2016
Minimum Pressure 1017 hPa 04:54 1022 hPa 1035 hPa, 2017 984 hPa, 2009
Maximum Pressure 1023 hPa 21:40 1027 hPa 1036 hPa, 2017 997 hPa, 2009
Mean Pressure 1019 hPa 1025 hPa 1035 hPa, 2017 990 hPa, 2009
Mean Wind Speed 5.4 mph (+0.3) 2.8 mph (-2.3) 11.9 mph, 2013 2.0 mph, 2009
Maximum Wind Speed 13.7 mph 06:28 8.8 mph 21.3 mph, 2013 8.1 mph, 2009
Maximum Gust 19.9 mph 05:13 13.0 mph 34.4 mph, 2013 10.2 mph, 2009
Mean Wind Direction SW
Rainfall 0.2 mm 8.5 mm (22%) 8.1 mm, 2013
Maximum Hourly Rain 0.2 mm 2.1 mm, 2013
Maximum 10-min Rain 0.2 mm 1.2 mm, 2013
Maximum Rain Rate n/a 54, 2013
Minimum Dew Point 0.8 °C 00:07 1.8 °C 8.3 °C, 2017 -4.4 °C, 2009
Maximum Dew Point 8.6 °C 13:59 6.6 °C 11.3 °C, 2015 0.8 °C, 2010
Mean Dew Point 6.2 °C 4.6 °C 9.6 °C, 2017 -1.5 °C, 2009
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 4.9 °C * 21:37 6.1 °C 10.1 °C, 2017 -2.9 °C, 2009
Day Maximum (09-21) 12.1 °C 14:23 10.4 °C 12.9 °C, 2015 1.4 °C, 2010
Max 10m Temp Rise 0.2 °C 04:30 0.4 °C 1.3 °C, 2009 0.1 °C, 2010
Max 1hr Temp Rise 0.9 °C 01:59 1.2 °C 1.9 °C, 2009 0.4 °C, 2017
Max 1hr Hum Rise 4% 01:59 3% 10%, 2013 2%, 2010
Max 10m Temp Fall 0.2 °C 16:18 0.3 °C 1.3 °C, 2009 0.1 °C, 2010
Max 1hr Temp Fall 0.7 °C 16:43 1.0 °C 1.7 °C, 2013 0.3 °C, 2010
Max 1hr Hum Fall 6% 14:48 4% 12%, 2013 2%, 2010
Max 10m Wind Speed 10.6 mph 06:35 6.6 mph 17.2 mph, 2013 5.4 mph, 2009
Minimum Feels-like 0.6 °C 00:06 3.7 °C 7.3 °C, 2017 -5.7 °C, 2009
Maximum Feels-like 12.8 °C 14:23 10.8 °C 14.8 °C, 2015 1.4 °C, 2010
Mean Feels-like 8.6 °C 7.9 °C 11.7 °C, 2017 -1.2 °C, 2010
Air-frost Hrs 0 hrs 0.2 hrs 13 hrs, 2009 0 hrs, 2010
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 7.0 °C (+2.6) 4.9 °C (+0.1) 7.0 °C (+2.6), 2014 1.1 °C (-3.3), 2010
Humidity Range 10% 8% 22%, 2013 4%, 2010
Pressure Range 6 hPa 5 hPa 13 hPa, 2009 1 hPa, 2017
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0 [0%]36 hrs (112%) [24%] 2.5 [36%], 2012 0 [0%], 2009
Wet Hours 112 hrs (29%) [2.4%] 12, 2013 0, 2012
Cloud Cover Overcast
Events None
Comments o.night Rain
Extra Comments
Issues None known
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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