Daily Report for 2nd August 2011

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 18.0 °C (+3.4) 06:19 15.9 °C (+1.3) 18.8 °C (+4.2), 2022 11.4 °C (-3.2), 2009
Maximum Temperature 27.8 °C (+4.5) 17:21 28.0 °C (+4.7) 30.1 °C (+6.8), 2018 18.7 °C (-4.6), 2017
Mean Temperature 22.6 °C (+4.0) 22.0 °C (+3.0) 22.6 °C, 2011 16.2 °C, 2009
Minimum Humidity 40% 18:33 36% 88%, 2016 31%, 2015
Maximum Humidity 79% 08:55 74% 97%, 2023 74%, 2010
Mean Humidity 55% 53% 90%, 2023 55%, 2011
Minimum Pressure 1013 hPa 07:47 1012 hPa 1022 hPa, 2018 986 hPa, 2023
Maximum Pressure 1015 hPa 16:01 1014 hPa 1025 hPa, 2018 999 hPa, 2023
Mean Pressure 1014 hPa 1014 hPa 1024 hPa, 2018 990 hPa, 2023
Mean Wind Speed 2.2 mph (-1.8) 2.8 mph (-1.2) 7.4 mph, 2022 1.5 mph, 2021
Maximum Wind Speed 10.2 mph 11.0 mph 17.8 mph, 2012 8.1 mph, 2010
Maximum Gust 13.0 mph 18:57 14.1 mph 26.5 mph, 2023 11.5 mph, 2010
Mean Wind Direction S
Rainfall 0.3 mm 0.3 mm (9%) 13.2 mm, 2023
Maximum Hourly Rain 0.3 mm 07:32 3.8 mm, 2017
Maximum 10-min Rain n/a 07:32 2.8, 2013
Maximum Rain Rate n/a 72, 2013
Minimum Dew Point 7.4 °C 00:07 6.8 °C 15.0 °C, 2022 5.2 °C, 2015
Maximum Dew Point 16.0 °C 10:15 15.2 °C 20.1 °C, 2024 13.0 °C, 2010
Mean Dew Point 12.7 °C 11.6 °C 17.7 °C, 2022 9.3 °C, 2015
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 18.0 °C 07:40 15.9 °C 18.8 °C, 2022 11.4 °C, 2009
Day Maximum (09-21) 27.8 °C 17:20 28.0 °C 30.1 °C, 2018 18.7 °C, 2017
Max 10m Temp Rise 0.6 °C 09:29 0.6 °C 1.2 °C, 2010 0.2 °C, 2016
Max 1hr Temp Rise 3.0 °C 10:15 3.0 °C 3.0 °C, 2011 0.7 °C, 2016
Max 1hr Hum Rise 7% 01:07 7% 14%, 2019 4%, 2016
Max 10m Temp Fall 1.1 °C 19:04 0.8 °C 1.1 °C, 2010 0.2 °C, 2016
Max 1hr Temp Fall 1.7 °C 23:58 1.4 °C 3.3 °C, 2018 1.1 °C, 2021
Max 1hr Hum Fall 10% 10:48 10% 15%, 2021 1%, 2016
Max 10m Wind Speed 7.0 mph 19:09 7.5 mph 13.6 mph, 2023 5.5 mph, 2019
Minimum Feels-like 20.1 °C 02:12 17.0 °C 23.7 °C, 2024 12.8 °C, 2009
Maximum Feels-like 31.0 °C 17:15 30.9 °C 35.7 °C, 2018 22.1 °C, 2009
Mean Feels-like 25.3 °C 24.1 °C 27.9 °C, 2022 17.6 °C, 2009
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 9.8 °C (+1.1) 12.1 °C (+3.4) 15.2 °C (+6.5), 2018 3.3 °C (-5.4), 2017
Humidity Range 39% 38% 55%, 2015 5%, 2016
Pressure Range 2 hPa 2 hPa 13 hPa, 2023 2 hPa, 2021
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 6.5 [46%]15 hrs (115%) [52%] 14 [100%], 2018 0 [0%], 2016
Wet Hours 0.50.5 hrs (20%) [1%] 12, 2023 0, 2009
Cloud Cover am: Mostly Cloudy transitioned to Mostly Sunny
pm: Mostly Cloudy
Events None
Comments ; 0630-0730 Light Showers/Rain
Extra Comments
Issues None known
Observer Absent? No
Pond Temperature (Heath) 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 2nd August 2011.
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

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Webcam Summary of Cloud Conditions

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Wind rose