Daily Report for 7th July 2018

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 16.7 °C (+3.0) 05:35 15.6 °C (+2.1) 18.8 °C (+5.1), 2017 9.4 °C (-4.3), 2020
Maximum Temperature 30.3 °C (+7.6) 15:32 28.5 °C (+5.9) 30.3 °C (+7.6), 2018 17.8 °C (-4.9), 2024
Mean Temperature 24.3 °C (+5.3) 22.3 °C (+4.0) 24.3 °C, 2018 14.2 °C, 2024
Minimum Humidity 37% 19:15 34% 75%, 2009 32%, 2017
Maximum Humidity 91% 06:03 82% 94%, 2019 68%, 2016
Mean Humidity 59% 57% 88%, 2009 52%, 2017
Minimum Pressure 1024 hPa 03:43 1017 hPa 1030 hPa, 2013 1002 hPa, 2009
Maximum Pressure 1026 hPa 23:53 1020 hPa 1033 hPa, 2022 1005 hPa, 2011
Mean Pressure 1024 hPa 1018 hPa 1031 hPa, 2013 1004 hPa, 2011
Mean Wind Speed 2.4 mph (-1.9) 3.7 mph (-0.6) 7.7 mph, 2011 2.4 mph, 2018
Maximum Wind Speed 11.1 mph 12:33 11.3 mph 18.1 mph, 2015 9.8 mph, 2013
Maximum Gust 16.1 mph 12:55 16.1 mph 28.4 mph, 2015 13.0 mph, 2014
Mean Wind Direction NW
Rainfall 0.0 mm 1.5 mm (14%) 7.1 mm, 2009
Maximum Hourly Rain n/a 4.4, 2024
Maximum 10-min Rain n/a 1.7, 2009
Maximum Rain Rate n/a 33, 2009
Minimum Dew Point 11.8 °C 20:30 9.3 °C 11.9 °C, 2009 4.7 °C, 2015
Maximum Dew Point 17.5 °C 08:51 15.2 °C 17.5 °C, 2018 11.1 °C, 2014
Mean Dew Point 15.0 °C 12.5 °C 15.0 °C, 2018 9.4 °C, 2014
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 16.7 °C 05:35 15.6 °C 18.8 °C, 2017 9.4 °C, 2020
Day Maximum (09-21) 30.3 °C 15:32 28.5 °C 30.3 °C, 2018 17.8 °C, 2024
Max 10m Temp Rise 0.7 °C 07:09 0.6 °C 0.9 °C, 2023 0.5 °C, 2015
Max 1hr Temp Rise 3.3 °C 07:36 2.6 °C 4.2 °C, 2023 1.5 °C, 2021
Max 1hr Hum Rise 18% 23:06 15% 22%, 2020 5%, 2021
Max 10m Temp Fall 0.6 °C 23:12 0.5 °C 1.9 °C, 2024 0.3 °C, 2010
Max 1hr Temp Fall 2.7 °C 22:30 2.2 °C 4.2 °C, 2024 1.2 °C, 2010
Max 1hr Hum Fall 16% 07:56 12% 17%, 2023 7%, 2010
Max 10m Wind Speed 8.0 mph 12:56 8.4 mph 15.0 mph, 2015 7.4 mph, 2017
Minimum Feels-like 20.5 °C 05:19 17.7 °C 21.9 °C, 2017 8.0 °C, 2020
Maximum Feels-like 34.2 °C 15:34 31.4 °C 34.2 °C, 2018 20.3 °C, 2024
Mean Feels-like 28.3 °C 24.9 °C 28.3 °C, 2018 16.1 °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 13.6 °C (+4.5) 13.0 °C (+3.9) 18.8 °C (+9.7), 2023 4.2 °C (-4.9), 2009
Humidity Range 54% 48% 54%, 2018 18%, 2009
Pressure Range 2 hPa 4 hPa 10 hPa, 2021 2 hPa, 2018
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 13.5 [90%]86 hrs (190%) [82%] 14.5 [97%], 2023 1 [7%], 2012
Wet Hours 01.5 hrs (20%) [0.9%] 5, 2020 0, 2010
Cloud Cover am: Sunny
pm: Mostly Sunny transitioned to 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 7th July 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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