Daily Report for 12th June 2012

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 10.0 °C (-1.8) 08:11 10.3 °C (-1.1) 16.6 °C (+4.8), 2023 6.8 °C (-5.0), 2024
Maximum Temperature 13.3 °C (-7.5) 15:29 16.4 °C (-3.9) 28.8 °C (+8.0), 2023 13.3 °C (-7.5), 2012
Mean Temperature 11.2 °C (-4.6) 13.1 °C (-2.5) 22.1 °C, 2023 11.2 °C, 2012
Minimum Humidity 68% 17:52 60% 72%, 2016 35%, 2014
Maximum Humidity 98% 03:26 94% 98%, 2012 70%, 2017
Mean Humidity 86% 79% 88%, 2019 55%, 2014
Minimum Pressure 1003 hPa 01:44 1004 hPa 1026 hPa, 2014 1003 hPa, 2012
Maximum Pressure 1016 hPa 23:29 1011 hPa 1029 hPa, 2014 1010 hPa, 2016
Mean Pressure 1009 hPa 1008 hPa 1028 hPa, 2014 1007 hPa, 2020
Mean Wind Speed 4.9 mph (+0.5) 6.0 mph (+1.6) 7.9 mph, 2013 0.9 mph, 2014
Maximum Wind Speed 13.8 mph 03:42 14.1 mph 25.8 mph, 2023 5.6 mph, 2014
Maximum Gust 18.7 mph 03:41 20.3 mph 41.5 mph, 2023 8.7 mph, 2014
Mean Wind Direction NNE
Rainfall 2.0 mm 88.6 mm (471%) 13.9 mm, 2023
Maximum Hourly Rain 1.2 mm 02:46 13.9 mm, 2023
Maximum 10-min Rain 0.4 mm 02:47 13.0 mm, 2023
Maximum Rain Rate 1.8 mm/h 02:47 120 mm/h, 2023
Minimum Dew Point 6.5 °C 21:45 6.5 °C 13.1 °C, 2023 2.9 °C, 2009
Maximum Dew Point 10.7 °C 12:18 11.5 °C 21.2 °C, 2023 9.3 °C, 2024
Mean Dew Point 8.9 °C 9.3 °C 17.0 °C, 2023 6.6 °C, 2009
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 10.0 °C 08:11 10.6 °C 16.6 °C, 2023 6.8 °C, 2024
Day Maximum (09-21) 13.3 °C 15:30 16.4 °C 28.8 °C, 2023 13.3 °C, 2012
Max 10m Temp Rise 0.4 °C 11:56 0.6 °C 0.8 °C, 2023 0.3 °C, 2013
Max 1hr Temp Rise 1.4 °C 12:26 1.8 °C 3.8 °C, 2023 1.2 °C, 2013
Max 1hr Hum Rise 3% 18:48 9% 30%, 2023 3%, 2012
Max 10m Temp Fall 0.3 °C 13:36 0.5 °C 4.1 °C, 2023 0.3 °C, 2012
Max 1hr Temp Fall 0.6 °C 20:35 1.4 °C 7.2 °C, 2023 0.6 °C, 2012
Max 1hr Hum Fall 10% 13:29 11% 20%, 2023 5%, 2016
Max 10m Wind Speed 8.6 mph 03:59 9.7 mph 14.2 mph, 2023 3.6 mph, 2014
Minimum Feels-like 10.6 °C 23:29 10.5 °C 20.3 °C, 2023 6.3 °C, 2024
Maximum Feels-like 14.4 °C 15:29 17.6 °C 35.9 °C, 2023 14.4 °C, 2012
Mean Feels-like 12.0 °C 14.2 °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 3.3 °C (-5.7) 6.1 °C (-2.8) 13.4 °C (+4.4), 2009 2.5 °C (-6.5), 2013
Humidity Range 30% 33% 46%, 2014 15%, 2016
Pressure Range 13 hPa 8 hPa 13 hPa, 2012 2 hPa, 2023
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0 [0%]23 hrs (29%) [13%] 13 [86%], 2014 0 [0%], 2012
Wet Hours 4
[Mean rain rate: 0.5 mm/h]		82 hrs (551%) [28%] 8, 2011 0, 2009
Cloud Cover Overcast
Events None
Comments -11 broken Slight Rain/Drizzle
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature @ Hampstead Heath 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 12th June 2012.
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

day graph

Webcam Summary of Cloud Conditions

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Wind rose