Daily Report for 29th May 2017

<<Previous Day
Reset
Next Day>>
Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 14.0 °C (+4.1) 05:12 10.2 °C (+2.1) 14.0 °C (+4.1), 2012 8.8 °C (-1.1), 2013
Maximum Temperature 22.0 °C (+3.9) 14:58 19.1 °C (+2.5) 24.0 °C (+5.9), 2009 12.5 °C (-5.6), 2013
Mean Temperature 17.9 °C (+4.0) 14.5 °C (+2.3) 18.4 °C, 2012 10.8 °C, 2013
Minimum Humidity 71% 15:03 53% 80%, 2013 39%, 2009
Maximum Humidity 88% 07:39 83% 97%, 2014 80%, 2011
Mean Humidity 81% 69% 88%, 2013 63%, 2015
Minimum Pressure 1011 hPa 18:25 1013 hPa 1029 hPa, 2009 1001 hPa, 2013
Maximum Pressure 1015 hPa 05:35 1021 hPa 1033 hPa, 2009 1008 hPa, 2013
Mean Pressure 1017 hPa 1017 hPa 1031 hPa, 2009 1004 hPa, 2013
Mean Wind Speed 2.0 mph (-2.7) 4.0 mph (-0.7) 8.6 mph, 2011 2.0 mph, 2017
Maximum Wind Speed 8.5 mph 03:43 11.1 mph 17.8 mph, 2011 8.5 mph, 2017
Maximum Gust 11.5 mph 00:58 17.0 mph 27.7 mph, 2011 10.9 mph, 2013
Mean Wind Direction SSE
Rainfall 16.0 mm 85.9 mm (180%) 16.0 mm, 2017
Maximum Hourly Rain 8.0 mm 17:45 8.0 mm, 2017
Maximum 10-min Rain 4.0 mm 17:30 4.0 mm, 2017
Maximum Rain Rate 100 mm/h 17:30 100 mm/h, 2017
Minimum Dew Point 11.5 °C 02:34 6.0 °C 11.5 °C, 2017 1.6 °C, 2015
Maximum Dew Point 16.9 °C 18:02 10.8 °C 16.9 °C, 2017 9.8 °C, 2015
Mean Dew Point 14.6 °C 8.5 °C 14.6 °C, 2017 4.6 °C, 2015
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 14.0 °C 05:12 10.4 °C 14.0 °C, 2012 8.8 °C, 2013
Day Maximum (09-21) 22.0 °C 14:58 19.1 °C 24.0 °C, 2009 12.5 °C, 2013
Max 10m Temp Rise 0.6 °C 12:03 0.6 °C 0.7 °C, 2009 0.5 °C, 2010
Max 1hr Temp Rise 2.4 °C 12:17 2.2 °C 2.8 °C, 2009 1.6 °C, 2016
Max 1hr Hum Rise 8% 17:59 9% 18%, 2015 5%, 2011
Max 10m Temp Fall 0.7 °C 17:37 0.5 °C 0.7 °C, 2017 0.4 °C, 2013
Max 1hr Temp Fall 1.9 °C 02:05 1.8 °C 2.5 °C, 2009 0.8 °C, 2014
Max 1hr Hum Fall 7% 12:22 10% 18%, 2015 6%, 2010
Max 10m Wind Speed 7.4 mph 03:44 8.4 mph 13.9 mph, 2011 5.8 mph, 2012
Minimum Feels-like 16.1 °C 04:49 9.5 °C 16.1 °C, 2017 5.8 °C, 2016
Maximum Feels-like 27.1 °C 14:08 20.6 °C 27.1 °C, 2017 14.5 °C, 2013
Mean Feels-like 21.6 °C 15.3 °C 21.6 °C, 2017 11.4 °C, 2013
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 8.0 °C (-0.3) 8.9 °C (+0.5) 11.9 °C (+3.6), 2009 3.7 °C (-4.6), 2010
Humidity Range 17% 30% 56%, 2009 13%, 2013
Pressure Range 4 hPa 8 hPa 10 hPa, 2010 2 hPa, 2012
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0.1 [1%]155 hrs (87%) [38%] 11.6 [79%], 2009 0 [0%], 2013
Wet Hours 3
[Mean rain rate: 5 mm/h]
44 hrs (118%) [6.3%] 4, 2010 0, 2009
Cloud Cover am: Overcast
pm: Mostly Cloudy or Overcast
Events None
Comments o.night Rain; Torrential 1715 Shower
Extra Comments possibleible o.night Thunder
Issues Rn data from N16 (17 Sh missed, totat is estimate from Muswell Hill)
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.
View monthly summary

Daily Graph of Conditions

day graph

Webcam Summary of Cloud Conditions

daycamsum