Daily Report for 30th August 2016

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 11.8 °C (-1.2) 06:16 14.7 °C (+0.8) 15.5 °C (+2.5), 2013 9.3 °C (-3.7), 2010
Maximum Temperature 25.8 °C (+4.4) 17:00 23.5 °C (+1.1) 25.8 °C (+4.4), 2016 16.1 °C (-5.3), 2020
Mean Temperature 19.3 °C (+1.6) 19.0 °C (+0.9) 19.7 °C, 2013 13.2 °C, 2017
Minimum Humidity 34% 17:05 47% 76%, 2021 34%, 2016
Maximum Humidity 87% 07:01 85% 92%, 2012 76%, 2011
Mean Humidity 60% 67% 84%, 2015 60%, 2016
Minimum Pressure 1019 hPa 18:38 1015 hPa 1026 hPa, 2021 1002 hPa, 2025
Maximum Pressure 1027 hPa 09:09 1020 hPa 1029 hPa, 2021 1006 hPa, 2025
Mean Pressure 1023 hPa 1017 hPa 1027 hPa, 2021 1004 hPa, 2025
Mean Wind Speed 3.6 mph (-0.4) 6.2 mph (+2.2) 6.9 mph, 2025 1.3 mph, 2024
Maximum Wind Speed 11.9 mph 13:36 16.8 mph 17.7 mph, 2025 7.0 mph, 2018
Maximum Gust 19.4 mph 15:08 25.8 mph 26.5 mph, 2025 10.4 mph, 2018
Mean Wind Direction SW
Rainfall 0.0 mm 18.1 mm (35%) 9.1 mm, 2017
Maximum Hourly Rain n/a 3.8, 2017
Maximum 10-min Rain n/a 1.3, 2017
Maximum Rain Rate n/a 24, 2014
Minimum Dew Point 8.6 °C 00:03 9.4 °C 13.5 °C, 2015 3.1 °C, 2012
Maximum Dew Point 15.0 °C 09:49 15.1 °C 16.7 °C, 2025 9.8 °C, 2011
Mean Dew Point 10.4 °C 12.2 °C 14.4 °C, 2015 7.1 °C, 2010
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 11.8 °C 06:16 14.9 °C 15.5 °C, 2013 9.3 °C, 2010
Day Maximum (09-21) 25.8 °C 17:00 23.5 °C 25.8 °C, 2016 13.7 °C, 2017
Max 10m Temp Rise 0.7 °C 07:44 0.6 °C 0.8 °C, 2013 0.2 °C, 2017
Max 1hr Temp Rise 3.2 °C 08:33 2.1 °C 3.3 °C, 2022 0.5 °C, 2017
Max 1hr Hum Rise 7% 23:28 8% 13%, 2018 4%, 2015
Max 10m Temp Fall 0.6 °C 23:13 0.5 °C 0.9 °C, 2012 0.3 °C, 2009
Max 1hr Temp Fall 2.2 °C 23:35 1.8 °C 2.3 °C, 2013 0.8 °C, 2021
Max 1hr Hum Fall 15% 11:14 11% 18%, 2012 3%, 2021
Max 10m Wind Speed 9.5 mph 20:42 12.7 mph 13.2 mph, 2025 4.4 mph, 2018
Minimum Feels-like 12.8 °C 05:57 16.6 °C 18.2 °C, 2013 6.7 °C, 2010
Maximum Feels-like 27.0 °C 14:49 26.1 °C 27.3 °C, 2019 16.8 °C, 2011
Mean Feels-like 20.8 °C 21.5 °C 22.7 °C, 2013 14.3 °C, 2017
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 14.0 °C (+5.6) 8.8 °C (+0.3) 14.0 °C (+5.6), 2016 3.0 °C (-5.4), 2021
Humidity Range 53% 38% 53%, 2016 13%, 2017
Pressure Range 8 hPa 5 hPa 15 hPa, 2012 2 hPa, 2011
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 12.2 [98%]186 hrs (104%) [47%] 12.2 [98%], 2016 0 [0%], 2011
Wet Hours 026 hrs (72%) [3.7%] 7, 2017 0, 2009
Cloud Cover Sunny
Events Maximum possible sunshine
Comments -
Extra Comments
Issues Erroneous big tip removed
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 30th August 2016.
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

daycamsumLarge resolution version

Wind rose