Daily Report for 6th July 2017

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 18.1 °C (+4.5) 05:14 15.2 °C (+1.7) 18.1 °C (+4.5), 2017 10.5 °C (-3.1), 2016
Maximum Temperature 31.2 °C (+8.5) 16:13 26.0 °C (+3.4) 31.2 °C (+8.5), 2017 16.4 °C (-6.3), 2024
Mean Temperature 23.9 °C (+6.5) 20.5 °C (+2.6) 23.9 °C, 2017 13.9 °C, 2024
Minimum Humidity 42% 15:26 43% 68%, 2021 33%, 2018
Maximum Humidity 73% 23:36 77% 97%, 2024 68%, 2010
Mean Humidity 57% 59% 86%, 2021 52%, 2010
Minimum Pressure 1011 hPa 17:17 1015 hPa 1028 hPa, 2013 994 hPa, 2021
Maximum Pressure 1019 hPa 00:23 1021 hPa 1031 hPa, 2013 1007 hPa, 2011
Mean Pressure 1016 hPa 1018 hPa 1029 hPa, 2013 1001 hPa, 2021
Mean Wind Speed 3.0 mph (-1.3) 3.2 mph (-1.1) 8.3 mph, 2011 1.7 mph, 2018
Maximum Wind Speed 9.7 mph 18:03 9.6 mph 19.4 mph, 2011 7.4 mph, 2013
Maximum Gust 16.8 mph 11:54 15.0 mph 27.0 mph, 2011 11.6 mph, 2019
Mean Wind Direction SE
Rainfall 0.0 mm 0.0 mm (0%) 27.8 mm, 2024
Maximum Hourly Rain n/a 10.8, 2024
Maximum 10-min Rain n/a 6.5, 2024
Maximum Rain Rate n/a 72, 2024
Minimum Dew Point 11.5 °C 00:10 8.9 °C 11.8 °C, 2018 5.0 °C, 2010
Maximum Dew Point 16.9 °C 16:30 14.1 °C 17.3 °C, 2018 9.3 °C, 2010
Mean Dew Point 14.5 °C 11.8 °C 14.6 °C, 2018 7.3 °C, 2016
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 18.1 °C 05:14 15.1 °C 18.1 °C, 2017 10.5 °C, 2016
Day Maximum (09-21) 31.2 °C 16:13 26.0 °C 31.2 °C, 2017 16.4 °C, 2024
Max 10m Temp Rise 0.7 °C 09:00 0.7 °C 0.8 °C, 2009 0.5 °C, 2010
Max 1hr Temp Rise 2.6 °C 09:48 2.5 °C 3.1 °C, 2013 1.7 °C, 2009
Max 1hr Hum Rise 9% 01:13 7% 20%, 2018 5%, 2010
Max 10m Temp Fall 1.0 °C 18:58 0.6 °C 1.2 °C, 2009 0.4 °C, 2010
Max 1hr Temp Fall 3.2 °C 19:00 2.1 °C 3.2 °C, 2017 1.3 °C, 2010
Max 1hr Hum Fall 10% 08:01 9% 15%, 2021 7%, 2022
Max 10m Wind Speed 7.3 mph 11:46 7.1 mph 12.4 mph, 2011 5.0 mph, 2019
Minimum Feels-like 20.4 °C 04:56 16.4 °C 20.4 °C, 2017 10.5 °C, 2016
Maximum Feels-like 36.3 °C 16:09 28.8 °C 36.3 °C, 2017 20.6 °C, 2024
Mean Feels-like 27.7 °C 22.8 °C 27.7 °C, 2017 15.9 °C, 2024
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 13.1 °C (+4.0) 10.8 °C (+1.7) 15.3 °C (+6.2), 2013 4.9 °C (-4.2), 2021
Humidity Range 31% 34% 57%, 2018 19%, 2022
Pressure Range 8 hPa 5 hPa 14 hPa, 2021 2 hPa, 2023
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 9 [60%]53 hrs (137%) [59%] 14 [93%], 2018 2 [13%], 2021
Wet Hours 00 hrs (0%) [0%] 10, 2012 0, 2010
Cloud Cover Hazy with periods of Partly Cloudy
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 July 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