Daily Report for 5th August 2018

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 15.5 °C (+1.0) 05:51 16.3 °C (+1.7) 16.5 °C (+2.0), 2019 11.7 °C (-2.8), 2010
Maximum Temperature 28.2 °C (+5.0) 15:32 29.1 °C (+5.8) 28.2 °C (+5.0), 2018 18.1 °C (-5.1), 2023
Mean Temperature 22.4 °C (+3.0) 22.7 °C (+3.8) 22.4 °C, 2018 14.5 °C, 2023
Minimum Humidity 41% 15:37 39% 82%, 2023 34%, 2020
Maximum Humidity 95% 07:04 88% 95%, 2018 70%, 2022
Mean Humidity 64% 63% 89%, 2023 53%, 2022
Minimum Pressure 1020 hPa 20:07 1021 hPa 1020 hPa, 2018 998 hPa, 2021
Maximum Pressure 1026 hPa 08:23 1025 hPa 1028 hPa, 2022 1009 hPa, 2012
Mean Pressure 1024 hPa 1023 hPa 1024 hPa, 2018 1006 hPa, 2021
Mean Wind Speed 2.7 mph (-1.3) 2.9 mph (-1.1) 8.3 mph, 2020 2.1 mph, 2017
Maximum Wind Speed 9.7 mph 13:03 10.0 mph 17.4 mph, 2020 8.7 mph, 2009
Maximum Gust 12.7 mph 16:46 15.4 mph 26.5 mph, 2020 12.5 mph, 2009
Mean Wind Direction ESE
Rainfall 0.0 mm 0.0 mm (0%) 15.8 mm, 2012
Maximum Hourly Rain n/a 14.1, 2012
Maximum 10-min Rain n/a 8.3, 2012
Maximum Rain Rate n/a 100, 2012
Minimum Dew Point 13.0 °C 09:42 12.3 °C 14.2 °C, 2009 6.0 °C, 2010
Maximum Dew Point 16.7 °C 07:36 16.9 °C 19.1 °C, 2024 9.8 °C, 2022
Mean Dew Point 14.6 °C 14.8 °C 16.2 °C, 2009 8.3 °C, 2010
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 15.5 °C 05:52 16.3 °C 17.5 °C, 2013 11.7 °C, 2010
Day Maximum (09-21) 28.2 °C 15:32 29.1 °C 28.2 °C, 2018 18.1 °C, 2023
Max 10m Temp Rise 0.8 °C 07:11 0.6 °C 1.5 °C, 2016 0.4 °C, 2023
Max 1hr Temp Rise 3.5 °C 07:56 2.7 °C 3.5 °C, 2018 1.1 °C, 2023
Max 1hr Hum Rise 8% 20:45 14% 18%, 2013 4%, 2024
Max 10m Temp Fall 0.5 °C 20:00 0.6 °C 1.4 °C, 2017 0.4 °C, 2009
Max 1hr Temp Fall 2.4 °C 20:46 3.0 °C 3.5 °C, 2012 1.3 °C, 2014
Max 1hr Hum Fall 18% 08:27 13% 18%, 2018 6%, 2023
Max 10m Wind Speed 6.9 mph 17:52 7.5 mph 13.2 mph, 2020 6.7 mph, 2009
Minimum Feels-like 19.0 °C 05:49 19.7 °C 19.9 °C, 2019 12.6 °C, 2010
Maximum Feels-like 31.9 °C 16:33 32.9 °C 33.3 °C, 2009 21.4 °C, 2010
Mean Feels-like 26.2 °C 26.6 °C 26.2 °C, 2009 17.1 °C, 2010
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 12.7 °C (+4.0) 12.8 °C (+4.1) 12.7 °C (+4.0), 2018 5.7 °C (-3.0), 2023
Humidity Range 54% 49% 54%, 2018 13%, 2023
Pressure Range 6 hPa 4 hPa 16 hPa, 2023 2 hPa, 2009
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 14 [101%]64 hrs (203%) [92%] 14 [101%], 2018 0.3 [2%], 2023
Wet Hours 00 hrs (0%) [0%] 7, 2023 0, 2009
Cloud Cover Sunny
Events Maximum possible sunshine
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 5th August 2018.
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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