Daily Report for 29th June 2018

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 12.3 °C (-0.7) 05:28 12.6 °C (+0.6) 17.3 °C (+4.3), 2010 10.0 °C (-3.0), 2014
Maximum Temperature 27.4 °C (+5.3) 16:23 23.3 °C (+2.4) 33.6 °C (+11.5), 2019 16.8 °C (-5.3), 2016
Mean Temperature 19.9 °C (+2.3) 17.8 °C (+1.5) 24.3 °C, 2019 14.5 °C, 2014
Minimum Humidity 35% 16:50 48% 71%, 2021 30%, 2019
Maximum Humidity 91% 06:07 87% 96%, 2009 74%, 2010
Mean Humidity 64% 69% 87%, 2021 53%, 2010
Minimum Pressure 1020 hPa 19:49 1019 hPa 1020 hPa, 2015 994 hPa, 2017
Maximum Pressure 1025 hPa 00:53 1022 hPa 1025 hPa, 2018 999 hPa, 2017
Mean Pressure 1023 hPa 1020 hPa 1023 hPa, 2013 996 hPa, 2017
Mean Wind Speed 4.4 mph (+0.0) 4.3 mph (-0.1) 11.2 mph, 2016 2.9 mph, 2014
Maximum Wind Speed 11.6 mph 15:34 11.3 mph 23.1 mph, 2016 8.8 mph, 2017
Maximum Gust 19.6 mph 15:49 17.6 mph 38.7 mph, 2016 13.6 mph, 2017
Mean Wind Direction NE
Rainfall 0.0 mm 0.8 mm (2%) 8.4 mm, 2023
Maximum Hourly Rain n/a 4.1, 2023
Maximum 10-min Rain n/a 1.7, 2023
Maximum Rain Rate n/a 14.4, 2023
Minimum Dew Point 10.1 °C 19:59 8.7 °C 12.8 °C, 2019 4.9 °C, 2011
Maximum Dew Point 14.3 °C 18:07 13.9 °C 19.8 °C, 2019 10.3 °C, 2020
Mean Dew Point 12.3 °C 11.4 °C 15.8 °C, 2019 6.6 °C, 2011
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 12.3 °C 05:32 12.7 °C 17.3 °C, 2010 10.4 °C, 2011
Day Maximum (09-21) 27.4 °C 16:51 23.3 °C 33.6 °C, 2019 16.8 °C, 2016
Max 10m Temp Rise 0.6 °C 08:35 0.7 °C 0.9 °C, 2020 0.4 °C, 2017
Max 1hr Temp Rise 2.5 °C 08:59 2.5 °C 3.3 °C, 2019 1.3 °C, 2021
Max 1hr Hum Rise 16% 22:06 10% 16%, 2018 4%, 2011
Max 10m Temp Fall 0.7 °C 22:00 0.5 °C 0.9 °C, 2014 0.2 °C, 2017
Max 1hr Temp Fall 3.0 °C 22:36 1.9 °C 3.0 °C, 2018 0.7 °C, 2017
Max 1hr Hum Fall 10% 09:05 12% 19%, 2012 6%, 2017
Max 10m Wind Speed 8.8 mph 19:02 8.6 mph 18.9 mph, 2016 0.0 mph, 2024
Minimum Feels-like 13.8 °C 05:28 13.7 °C 18.5 °C, 2010 10.2 °C, 2014
Maximum Feels-like 30.4 °C 18:07 26.0 °C 39.0 °C, 2019 19.1 °C, 2016
Mean Feels-like 22.3 °C 19.9 °C 28.8 °C, 2019 15.6 °C, 2014
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 15.1 °C (+6.0) 10.7 °C (+1.7) 19.7 °C (+10.6), 2019 4.1 °C (-5.0), 2021
Humidity Range 56% 39% 64%, 2019 18%, 2016
Pressure Range 5 hPa 4 hPa 11 hPa, 2019 2 hPa, 2020
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 13.5 [89%]220 hrs (117%) [50%] 14 [93%], 2019 0 [0%], 2021
Wet Hours 03.5 hrs (10%) [0.5%] 7, 2023 0, 2009
Cloud Cover am: Partly Cloudy transitioned to Sunny
pm: 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 29th June 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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