Daily Report for 17th November 2016

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 7.3 °C (+2.2) 23:58 4.8 °C (-1.1) 12.3 °C (+7.2), 2015 0.2 °C (-4.9), 2017
Maximum Temperature 12.9 °C (+2.5) 14:15 10.6 °C (-0.5) 15.7 °C (+5.3), 2015 7.3 °C (-3.1), 2010
Mean Temperature 9.2 °C (+2.4) 7.7 °C (-0.8) 13.8 °C, 2015 4.4 °C, 2017
Minimum Humidity 64% 17:47 68% 90%, 2013 55%, 2009
Maximum Humidity 79% 03:01 81% 98%, 2011 79%, 2016
Mean Humidity 73% 76% 95%, 2014 73%, 2016
Minimum Pressure 990 hPa 23:54 1010 hPa 1027 hPa, 2017 975 hPa, 2022
Maximum Pressure 1009 hPa 00:49 1018 hPa 1030 hPa, 2017 993 hPa, 2022
Mean Pressure 998 hPa 1014 hPa 1029 hPa, 2017 984 hPa, 2022
Mean Wind Speed 10.8 mph (+6.2) 5.8 mph (+1.2) 10.8 mph, 2016 0.9 mph, 2013
Maximum Wind Speed 24.4 mph 13:52 16.5 mph 30.1 mph, 2015 5.4 mph, 2013
Maximum Gust 45.2 mph 13:52 26.2 mph 45.5 mph, 2015 7.1 mph, 2013
Mean Wind Direction WSW
Rainfall 0.7 mm 45.0 mm (119%) 7.3 mm, 2014
Maximum Hourly Rain 0.5 mm 14:32 3.5 mm, 2015
Maximum 10-min Rain 0.5 mm 14:32 1.6 mm, 2015
Maximum Rain Rate 11 mm/h 14:30 54 mm/h, 2015
Minimum Dew Point 2.0 °C 21:09 1.0 °C 9.7 °C, 2020 -0.9 °C, 2017
Maximum Dew Point 7.5 °C 14:27 6.2 °C 13.9 °C, 2015 3.3 °C, 2017
Mean Dew Point 4.6 °C 3.7 °C 10.7 °C, 2020 1.5 °C, 2017
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 7.7 °C * 08:06 5.5 °C 11.9 °C, 2015 0.2 °C, 2017
Day Maximum (09-21) 12.9 °C 14:15 10.6 °C 15.7 °C, 2015 7.3 °C, 2010
Max 10m Temp Rise 0.3 °C 09:26 0.3 °C 0.7 °C, 2019 0.1 °C, 2010
Max 1hr Temp Rise 1.4 °C 12:30 1.3 °C 2.4 °C, 2017 0.3 °C, 2010
Max 1hr Hum Rise 9% 14:53 4% 10%, 2017 2%, 2013
Max 10m Temp Fall 1.2 °C 14:37 0.4 °C 1.2 °C, 2016 0.1 °C, 2013
Max 1hr Temp Fall 1.9 °C 15:08 1.3 °C 2.8 °C, 2017 0.3 °C, 2013
Max 1hr Hum Fall 7% 13:14 5% 18%, 2019 2%, 2013
Max 10m Wind Speed 20.7 mph 13:56 12.8 mph 24.2 mph, 2015 3.6 mph, 2013
Minimum Feels-like 2.8 °C 23:00 1.3 °C 12.7 °C, 2015 -1.6 °C, 2017
Maximum Feels-like 13.0 °C 14:27 10.4 °C 19.0 °C, 2015 7.0 °C, 2010
Mean Feels-like 6.9 °C 6.1 °C 15.5 °C, 2015 3.6 °C, 2017
Air-frost Hrs 0 hrs 0.1 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 5.6 °C (+0.3) 5.8 °C (+0.6) 8.4 °C (+3.1), 2017 1.9 °C (-3.4), 2013
Humidity Range 15% 12% 36%, 2017 7%, 2013
Pressure Range 19 hPa 8 hPa 19 hPa, 2016 2 hPa, 2018
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0.7 [9%]48 hrs (98%) [35%] 8 [103%], 2021 0 [0%], 2010
Wet Hours 1
[Mean rain rate: 0.7 mm/h]
38 hrs (106%) [9.3%] 11, 2014 0, 2009
Cloud Cover am: Overcast
pm: Mostly Cloudy transitioned to Partly Cloudy
Events None
Comments 1430, 2230 Showers
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 17th November 2016.
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 are derived based on analysis of webcam observations, but may use data from our closest site, Heathrow, when needed.
Wet hrs are dervied algorithmically from rainfall data, though may be adjusted manually.
Rainfall totals may be manually adjusted after the fact to correct delayed or erroneous data.
Cloud cover and Events are manually reported, often with multi-week delays.
Data is generally reliable and accurate but should always be viewed with some quantity of salt to hand.
View monthly summary

Daily Graph of Conditions

day graph

Webcam Summary of Cloud Conditions

daycamsumLarge resolution version

Wind rose