Daily Report for 21st January 2018

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 0.7 °C (-1.6) 04:52 3.4 °C (+1.0) 7.1 °C (+4.8), 2012 -2.5 °C (-4.8), 2017
Maximum Temperature 9.8 °C (+2.8) 23:55 8.0 °C (+1.0) 12.3 °C (+5.3), 2012 1.4 °C (-5.6), 2013
Mean Temperature 3.3 °C (+0.6) 5.6 °C (+1.0) 10.0 °C, 2012 -0.0 °C, 2013
Minimum Humidity 91% 09:39 75% 91%, 2018 47%, 2017
Maximum Humidity 98% 21:00 93% 98%, 2013 80%, 2017
Mean Humidity 95% 85% 95%, 2018 66%, 2017
Minimum Pressure 1006 hPa 21:30 1002 hPa 1038 hPa, 2011 991 hPa, 2013
Maximum Pressure 1016 hPa 09:01 1013 hPa 1040 hPa, 2011 999 hPa, 2013
Mean Pressure 1011 hPa 1008 hPa 1039 hPa, 2011 994 hPa, 2013
Mean Wind Speed 3.4 mph (-1.8) 6.5 mph (+1.3) 8.3 mph, 2012 1.5 mph, 2017
Maximum Wind Speed 10.6 mph 11:25 17.2 mph 19.2 mph, 2012 6.4 mph, 2013
Maximum Gust 16.1 mph 11:32 27.6 mph 28.4 mph, 2012 8.1 mph, 2013
Mean Wind Direction SSW
Rainfall / Snow-melt approx. 11.2 mm 51.0 mm (137%) 11.2 mm, 2018
Maximum Hourly Rain 2.8 mm 17:35 2.8 mm, 2018
Maximum 10-min Rain 0.6 mm 17:22 0.6 mm, 2018
Maximum Rain Rate 4.0 mm/h 13:05 4.0 mm/h, 2018
Minimum Dew Point -0.3 °C 04:40 1.0 °C 0.7 °C, 2014 -8.5 °C, 2017
Maximum Dew Point 9.3 °C 22:34 5.8 °C 9.3 °C, 2018 -1.9 °C, 2017
Mean Dew Point 2.5 °C 3.1 °C 4.8 °C, 2012 -5.1 °C, 2017
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 0.7 °C 04:52 4.0 °C 8.5 °C, 2012 -1.4 °C, 2016
Day Maximum (09-21) * 7.7 °C * 20:58 7.6 °C 12.3 °C, 2012 1.4 °C, 2013
Max 10m Temp Rise 0.4 °C 20:02 0.4 °C 0.8 °C, 2016 0.2 °C, 2011
Max 1hr Temp Rise 1.4 °C 20:17 1.0 °C 2.3 °C, 2016 0.4 °C, 2015
Max 1hr Hum Rise 2% 03:34 5% 7%, 2012 2%, 2014
Max 10m Temp Fall 0.3 °C 11:59 0.4 °C 0.4 °C, 2012 0.2 °C, 2010
Max 1hr Temp Fall 0.9 °C 12:50 1.0 °C 1.8 °C, 2013 0.6 °C, 2014
Max 1hr Hum Fall 3% 09:40 7% 22%, 2017 2%, 2015
Max 10m Wind Speed 8.4 mph 11:31 13.2 mph 11.8 mph, 2012 4.7 mph, 2013
Minimum Feels-like -3.7 °C 13:36 -1.0 °C 4.4 °C, 2012 -4.5 °C, 2017
Maximum Feels-like 9.2 °C 23:34 7.3 °C 12.5 °C, 2012 1.3 °C, 2013
Mean Feels-like 1.3 °C 2.8 °C 9.3 °C, 2012 -1.1 °C, 2013
Air-frost Hrs 0 hrs 0 hrs 13 hrs, 2013 0 hrs, 2010
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 9.1 °C (+4.4) 4.5 °C (-0.0) 9.1 °C (+4.4), 2018 2.8 °C (-1.9), 2015
Humidity Range 7% 17% 44%, 2009 7%, 2018
Pressure Range 10 hPa 11 hPa 10 hPa, 2018 2 hPa, 2011
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0 [0%]36 hrs (118%) [23%] 7.7 [101%], 2017 0 [0%], 2015
Wet Hours 10
[Mean rain rate: 1.1 mm/h]
47 hrs (104%) [9.3%] 10, 2018 , 2009
Cloud Cover Overcast
Events Snowfall: ~0.3 cm
Comments brief 0830 Snow then all dayRain
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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