Daily Report for 6th August 2017

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 11.3 °C (-3.1) 06:02 14.2 °C (-0.2) 18.6 °C (+4.2), 2020 10.2 °C (-4.2), 2010
Maximum Temperature 22.4 °C (-0.8) 15:00 21.2 °C (-2.0) 31.6 °C (+8.4), 2018 19.9 °C (-3.3), 2011
Mean Temperature 17.1 °C (-2.0) 17.8 °C (-1.1) 24.2 °C, 2018 15.2 °C, 2023
Minimum Humidity 39% 15:26 50% 63%, 2009 28%, 2018
Maximum Humidity 79% 07:02 81% 97%, 2009 79%, 2011
Mean Humidity 60% 65% 84%, 2009 55%, 2022
Minimum Pressure 1019 hPa 18:49 1012 hPa 1028 hPa, 2022 997 hPa, 2021
Maximum Pressure 1024 hPa 09:33 1017 hPa 1031 hPa, 2022 1002 hPa, 2021
Mean Pressure 1022 hPa 1014 hPa 1029 hPa, 2022 1000 hPa, 2021
Mean Wind Speed 3.6 mph (-0.4) 5.5 mph (+1.5) 7.8 mph, 2021 1.7 mph, 2022
Maximum Wind Speed 10.8 mph 14:17 13.8 mph 17.8 mph, 2021 6.7 mph, 2013
Maximum Gust 17.8 mph 15:24 21.7 mph 28.5 mph, 2021 9.8 mph, 2013
Mean Wind Direction WSW
Rainfall 0.0 mm 11.4 mm (109%) 34.3 mm, 2009
Maximum Hourly Rain n/a 9.9, 2009
Maximum 10-min Rain n/a 4.7, 2009
Maximum Rain Rate n/a 66, 2009
Minimum Dew Point 6.9 °C 00:06 8.6 °C 14.2 °C, 2009 6.5 °C, 2022
Maximum Dew Point 11.2 °C 10:10 13.5 °C 19.4 °C, 2009 11.2 °C, 2017
Mean Dew Point 8.8 °C 10.9 °C 16.9 °C, 2020 8.5 °C, 2022
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 11.3 °C 06:02 14.2 °C 18.9 °C, 2020 10.2 °C, 2010
Day Maximum (09-21) 22.4 °C 15:00 21.2 °C 31.6 °C, 2018 19.9 °C, 2011
Max 10m Temp Rise 0.6 °C 07:08 0.5 °C 1.0 °C, 2010 0.4 °C, 2011
Max 1hr Temp Rise 2.7 °C 07:54 2.0 °C 4.7 °C, 2018 1.7 °C, 2019
Max 1hr Hum Rise 6% 18:26 9% 19%, 2021 6%, 2017
Max 10m Temp Fall 0.4 °C 17:37 0.7 °C 1.0 °C, 2021 0.3 °C, 2010
Max 1hr Temp Fall 1.3 °C 20:28 1.7 °C 3.6 °C, 2020 1.3 °C, 2017
Max 1hr Hum Fall 8% 09:39 10% 21%, 2018 8%, 2009
Max 10m Wind Speed 8.4 mph 15:32 10.6 mph 14.9 mph, 2021 4.6 mph, 2022
Minimum Feels-like 11.5 °C 06:01 15.6 °C 22.3 °C, 2020 10.2 °C, 2010
Maximum Feels-like 23.0 °C 14:58 23.5 °C 34.4 °C, 2018 21.6 °C, 2011
Mean Feels-like 17.9 °C 19.6 °C 27.6 °C, 2020 17.1 °C, 2023
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 11.1 °C (+2.3) 7.0 °C (-1.7) 16.8 °C (+8.0), 2018 5.1 °C (-3.7), 2011
Humidity Range 40% 31% 64%, 2018 27%, 2011
Pressure Range 5 hPa 5 hPa 9 hPa, 2011 2 hPa, 2010
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 9 [65%]32 hrs (84%) [38%] 14 [101%], 2022 1 [7%], 2011
Wet Hours 06.5 hrs (88%) [4.5%] 7.5, 2009 0, 2013
Cloud Cover am: Sunny transitioned to Mostly Sunny
pm: 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 6th August 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

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Wind rose