Daily Report for 12th June 2023

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 16.6 °C (+4.9) 05:28 11.0 °C (-0.4) 16.6 °C (+4.9), 2023 6.8 °C (-4.9), 2024
Maximum Temperature 28.8 °C (+8.1) 12:48 22.8 °C (+2.6) 28.8 °C (+8.1), 2023 13.3 °C (-7.4), 2012
Mean Temperature 22.1 °C (+6.5) 16.4 °C (+1.1) 22.1 °C, 2023 11.2 °C, 2012
Minimum Humidity 55% 13:09 54% 72%, 2016 35%, 2014
Maximum Humidity 89% 05:53 87% 98%, 2012 70%, 2017
Mean Humidity 74% 73% 88%, 2019 55%, 2014
Minimum Pressure 1015 hPa 16:27 1020 hPa 1026 hPa, 2014 1003 hPa, 2012
Maximum Pressure 1017 hPa 13:57 1023 hPa 1029 hPa, 2014 1010 hPa, 2016
Mean Pressure 1016 hPa 1021 hPa 1028 hPa, 2014 1007 hPa, 2020
Mean Wind Speed 2.5 mph (-1.9) 5.6 mph (+1.2) 7.9 mph, 2013 0.9 mph, 2014
Maximum Wind Speed 25.8 mph 13:55 14.8 mph 25.8 mph, 2023 5.6 mph, 2014
Maximum Gust 41.5 mph 13:55 22.1 mph 41.5 mph, 2023 8.7 mph, 2014
Mean Wind Direction SE
Rainfall 13.9 mm 13.9 mm (74%) 13.9 mm, 2023
Maximum Hourly Rain 13.9 mm 14:12 13.9 mm, 2023
Maximum 10-min Rain 13.0 mm 14:04 13.0 mm, 2023
Maximum Rain Rate 120 mm/h 13:58 120 mm/h, 2023
Minimum Dew Point 13.1 °C 23:56 8.5 °C 13.1 °C, 2023 2.9 °C, 2009
Maximum Dew Point 21.2 °C 15:18 14.6 °C 21.2 °C, 2023 9.3 °C, 2024
Mean Dew Point 17.0 °C 11.2 °C 17.0 °C, 2023 6.6 °C, 2009
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 16.6 °C 05:28 11.0 °C 16.6 °C, 2023 6.8 °C, 2024
Day Maximum (09-21) 28.8 °C 12:55 22.8 °C 28.8 °C, 2023 13.3 °C, 2012
Max 10m Temp Rise 0.8 °C 15:24 0.7 °C 0.8 °C, 2023 0.3 °C, 2013
Max 1hr Temp Rise 3.8 °C 15:38 2.5 °C 3.8 °C, 2023 1.2 °C, 2013
Max 1hr Hum Rise 30% 14:42 10% 30%, 2023 3%, 2012
Max 10m Temp Fall 4.1 °C 14:02 0.8 °C 4.1 °C, 2023 0.3 °C, 2012
Max 1hr Temp Fall 7.2 °C 14:25 2.5 °C 7.2 °C, 2023 0.6 °C, 2012
Max 1hr Hum Fall 20% 16:16 9% 20%, 2023 5%, 2016
Max 10m Wind Speed 14.2 mph 13:58 10.6 mph 14.2 mph, 2023 3.6 mph, 2014
Minimum Feels-like 20.3 °C 05:28 10.8 °C 20.3 °C, 2023 6.3 °C, 2024
Maximum Feels-like 35.9 °C 12:45 26.2 °C 35.9 °C, 2023 14.4 °C, 2012
Mean Feels-like 27.5 °C 18.4 °C 27.5 °C, 2023 12.0 °C, 2012
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 12.2 °C (+3.2) 11.8 °C (+3.0) 13.4 °C (+4.4), 2009 2.5 °C (-6.5), 2013
Humidity Range 34% 33% 46%, 2014 15%, 2016
Pressure Range 2 hPa 3 hPa 13 hPa, 2012 2 hPa, 2023
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 6 [40%]109 hrs (142%) [61%] 13 [86%], 2014 0 [0%], 2012
Wet Hours 1
[Mean rain rate: 14 mm/h]
1 hrs (7%) [0.3%] 8, 2011 0, 2009
Cloud Cover unknown
Events Light Thunderstorm
Comments 14 ts
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 18.7 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 12th June 2023.
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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