Daily Report for 8th August 2013

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 10.2 °C (-4.2) 05:47 14.5 °C (-0.0) 19.4 °C (+5.0), 2020 10.2 °C (-4.2), 2013
Maximum Temperature 24.1 °C (+1.1) 16:48 24.6 °C (+1.5) 31.9 °C (+8.9), 2020 17.0 °C (-6.0), 2023
Mean Temperature 18.1 °C (-1.6) 19.6 °C (+0.7) 24.6 °C, 2020 15.1 °C, 2023
Minimum Humidity 35% 16:07 41% 74%, 2023 35%, 2013
Maximum Humidity 84% 06:52 89% 98%, 2009 78%, 2018
Mean Humidity 57% 64% 88%, 2023 54%, 2016
Minimum Pressure 1016 hPa 00:00 1011 hPa 1027 hPa, 2022 1000 hPa, 2011
Maximum Pressure 1020 hPa 16:09 1017 hPa 1030 hPa, 2022 1012 hPa, 2019
Mean Pressure 1019 hPa 1014 hPa 1028 hPa, 2022 1006 hPa, 2021
Mean Wind Speed 3.1 mph (-0.9) 4.6 mph (+0.6) 8.9 mph, 2016 1.8 mph, 2009
Maximum Wind Speed 10.5 mph 20:41 12.7 mph 19.5 mph, 2016 5.8 mph, 2009
Maximum Gust 13.7 mph 20:41 18.0 mph 29.0 mph, 2016 8.7 mph, 2009
Mean Wind Direction SW
Rainfall 0.0 mm 14.0 mm (100%) 4.9 mm, 2014
Maximum Hourly Rain n/a 3.6, 2014
Maximum 10-min Rain n/a 1, 2014
Maximum Rain Rate n/a 10.8, 2014
Minimum Dew Point 6.8 °C 04:33 9.2 °C 14.3 °C, 2020 4.2 °C, 2016
Maximum Dew Point 12.1 °C 08:11 15.1 °C 20.0 °C, 2020 11.7 °C, 2016
Mean Dew Point 8.9 °C 12.0 °C 17.3 °C, 2020 7.8 °C, 2016
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 10.2 °C 05:47 14.8 °C 20.4 °C, 2020 10.2 °C, 2013
Day Maximum (09-21) 24.1 °C 16:48 24.6 °C 31.9 °C, 2020 17.0 °C, 2023
Max 10m Temp Rise 1.5 °C 07:51 0.8 °C 1.5 °C, 2013 0.4 °C, 2014
Max 1hr Temp Rise 4.9 °C 08:26 2.7 °C 4.9 °C, 2013 0.9 °C, 2017
Max 1hr Hum Rise 10% 18:51 10% 19%, 2010 4%, 2017
Max 10m Temp Fall 0.4 °C 18:20 0.5 °C 0.9 °C, 2022 0.3 °C, 2017
Max 1hr Temp Fall 1.7 °C 18:58 1.8 °C 3.4 °C, 2012 0.9 °C, 2017
Max 1hr Hum Fall 20% 08:43 13% 33%, 2010 3%, 2023
Max 10m Wind Speed 8.1 mph 18:39 9.3 mph 14.1 mph, 2016 4.8 mph, 2012
Minimum Feels-like 10.3 °C 05:40 16.6 °C 23.9 °C, 2020 10.3 °C, 2013
Maximum Feels-like 24.5 °C 16:45 26.8 °C 39.3 °C, 2020 20.1 °C, 2017
Mean Feels-like 18.9 °C 22.0 °C 30.2 °C, 2020 17.6 °C, 2011
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 13.9 °C (+5.3) 10.2 °C (+1.5) 13.9 °C (+5.3), 2013 3.6 °C (-5.0), 2017
Humidity Range 49% 47% 54%, 2009 17%, 2017
Pressure Range 4 hPa 6 hPa 15 hPa, 2011 2 hPa, 2009
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 10 [73%]60 hrs (119%) [54%] 12 [87%], 2022 0.1 [1%], 2014
Wet Hours 04 hrs (41%) [2.1%] 6, 2023 0, 2009
Cloud Cover am: Sunny transitioned to Partly Cloudy
pm: Partly Cloudy
Events None
Comments -
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 8th August 2013.
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