Daily Report for 28th November 2017

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 2.6 °C (-1.6) 23:56 4.7 °C (-0.7) 9.5 °C (+5.3), 2014 -5.0 °C (-9.2), 2010
Maximum Temperature 6.1 °C (-3.5) 11:52 10.7 °C (-0.0) 13.2 °C (+3.6), 2018 0.6 °C (-9.0), 2010
Mean Temperature 4.2 °C (-2.6) 8.0 °C (-0.4) 11.9 °C, 2018 -2.1 °C, 2010
Minimum Humidity 68% 13:49 71% 89%, 2020 47%, 2016
Maximum Humidity 93% 08:17 94% 98%, 2009 72%, 2016
Mean Humidity 83% 84% 93%, 2022 61%, 2016
Minimum Pressure 1008 hPa 03:49 1013 hPa 1033 hPa, 2013 985 hPa, 2009
Maximum Pressure 1010 hPa 00:15 1021 hPa 1035 hPa, 2013 998 hPa, 2009
Mean Pressure 1009 hPa 1017 hPa 1034 hPa, 2013 992 hPa, 2009
Mean Wind Speed 4.5 mph (-0.1) 4.6 mph (+0.0) 8.2 mph, 2015 1.3 mph, 2013
Maximum Wind Speed 12.0 mph 13:17 12.2 mph 21.3 mph, 2018 6.7 mph, 2013
Maximum Gust 18.4 mph 13:18 18.9 mph 34.2 mph, 2021 8.7 mph, 2013
Mean Wind Direction WNW
Rainfall 0.0 mm 38.2 mm (61%) 13.9 mm, 2009
Maximum Hourly Rain n/a 3, 2009
Maximum 10-min Rain n/a 0.7, 2018
Maximum Rain Rate n/a 3.3, 2018
Minimum Dew Point 0.0 °C 23:56 2.3 °C 8.6 °C, 2014 -6.7 °C, 2010
Maximum Dew Point 3.0 °C 10:28 7.8 °C 11.9 °C, 2018 -2.2 °C, 2010
Mean Dew Point 1.4 °C 5.4 °C 10.8 °C, 2018 -4.8 °C, 2010
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 3.0 °C * 06:53 5.5 °C 9.5 °C, 2014 -5.0 °C, 2010
Day Maximum (09-21) 6.1 °C 11:52 10.5 °C 13.2 °C, 2018 0.6 °C, 2010
Max 10m Temp Rise 0.4 °C 10:16 0.4 °C 0.7 °C, 2022 0.1 °C, 2012
Max 1hr Temp Rise 1.2 °C 10:48 1.3 °C 2.8 °C, 2022 0.3 °C, 2012
Max 1hr Hum Rise 4% 17:54 6% 16%, 2021 2%, 2013
Max 10m Temp Fall 0.3 °C 04:09 0.4 °C 0.8 °C, 2021 0.1 °C, 2013
Max 1hr Temp Fall 0.9 °C 17:56 1.3 °C 1.6 °C, 2022 0.4 °C, 2013
Max 1hr Hum Fall 12% 11:06 8% 17%, 2016 2%, 2013
Max 10m Wind Speed 8.5 mph 13:19 9.1 mph 15.3 mph, 2018 4.2 mph, 2013
Minimum Feels-like -1.9 °C 23:51 1.9 °C 7.4 °C, 2014 -7.0 °C, 2021
Maximum Feels-like 5.1 °C 11:37 11.1 °C 15.4 °C, 2018 0.6 °C, 2010
Mean Feels-like 1.4 °C 7.0 °C 13.4 °C, 2018 -3.4 °C, 2010
Air-frost Hrs 0 hrs 0.0 hrs 18 hrs, 2010 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 3.5 °C (-1.9) 5.9 °C (+0.7) 12.3 °C (+6.9), 2011 1.8 °C (-3.6), 2013
Humidity Range 25% 23% 31%, 2009 7%, 2019
Pressure Range 2 hPa 8 hPa 18 hPa, 2019 2 hPa, 2013
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 5 [67%]81 hrs (103%) [37%] 7.4 [100%], 2016 0 [0%], 2013
Wet Hours 042 hrs (71%) [6.2%] 8, 2009 0, 2010
Cloud Cover Mostly Sunny
Events None
Comments -
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 28th November 2017.
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.
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Daily Graph of Conditions

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Webcam Summary of Cloud Conditions

daycamsumLarge resolution version

Wind rose