Daily Report for 8th August 2015

<<Previous Day
Reset
Next Day>>
Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 13.5 °C (-0.9) 06:00 13.0 °C (-1.4) 19.4 °C (+5.0), 2020 10.2 °C (-4.2), 2013
Maximum Temperature 26.0 °C (+3.0) 16:02 23.2 °C (+0.0) 31.9 °C (+8.9), 2020 17.0 °C (-6.0), 2023
Mean Temperature 19.5 °C (+1.0) 18.3 °C (-0.7) 24.6 °C, 2020 15.1 °C, 2023
Minimum Humidity 41% 16:57 41% 74%, 2023 35%, 2013
Maximum Humidity 91% 07:43 84% 98%, 2009 78%, 2018
Mean Humidity 67% 63% 88%, 2023 54%, 2016
Minimum Pressure 1021 hPa 00:00 1012 hPa 1027 hPa, 2022 1000 hPa, 2011
Maximum Pressure 1024 hPa 10:57 1017 hPa 1030 hPa, 2022 1012 hPa, 2019
Mean Pressure 1023 hPa 1015 hPa 1028 hPa, 2022 1006 hPa, 2021
Mean Wind Speed 2.7 mph (-1.3) 4.2 mph (+0.2) 8.9 mph, 2016 1.8 mph, 2009
Maximum Wind Speed 9.2 mph 18:34 12.2 mph 19.5 mph, 2016 5.8 mph, 2009
Maximum Gust 13.8 mph 18:34 17.1 mph 29.0 mph, 2016 8.7 mph, 2009
Mean Wind Direction ESE
Rainfall 0.0 mm 1.2 mm (9%) 4.9 mm, 2014
Maximum Hourly Rain n/a 3.6, 2014
Maximum 10-min Rain n/a 1, 2014
Maximum Rain Rate n/a 10.8, 2014
Minimum Dew Point 10.7 °C 19:24 7.4 °C 14.3 °C, 2020 4.2 °C, 2016
Maximum Dew Point 15.8 °C 10:07 13.7 °C 20.0 °C, 2020 11.7 °C, 2016
Mean Dew Point 12.5 °C 10.6 °C 17.3 °C, 2020 7.8 °C, 2016
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 13.5 °C 06:00 13.1 °C 20.4 °C, 2020 10.2 °C, 2013
Day Maximum (09-21) 26.0 °C 16:02 23.2 °C 31.9 °C, 2020 17.0 °C, 2023
Max 10m Temp Rise 0.6 °C 09:36 0.7 °C 1.5 °C, 2013 0.4 °C, 2014
Max 1hr Temp Rise 2.3 °C 10:12 2.4 °C 4.9 °C, 2013 0.9 °C, 2017
Max 1hr Hum Rise 6% 18:55 10% 19%, 2010 4%, 2017
Max 10m Temp Fall 0.6 °C 16:32 0.5 °C 0.9 °C, 2022 0.3 °C, 2017
Max 1hr Temp Fall 2.5 °C 18:56 1.9 °C 3.4 °C, 2012 0.9 °C, 2017
Max 1hr Hum Fall 12% 10:31 11% 33%, 2010 3%, 2023
Max 10m Wind Speed 6.2 mph 18:42 9.0 mph 14.1 mph, 2016 4.8 mph, 2012
Minimum Feels-like 15.6 °C 06:00 14.1 °C 23.9 °C, 2020 10.3 °C, 2013
Maximum Feels-like 28.4 °C 16:12 24.8 °C 39.3 °C, 2020 20.1 °C, 2017
Mean Feels-like 22.1 °C 20.0 °C 30.2 °C, 2020 17.6 °C, 2011
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 12.5 °C (+3.9) 10.2 °C (+1.5) 13.9 °C (+5.3), 2013 3.6 °C (-5.0), 2017
Humidity Range 50% 43% 54%, 2009 17%, 2017
Pressure Range 3 hPa 5 hPa 15 hPa, 2011 2 hPa, 2009
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 6 [44%]42 hrs (85%) [38%] 12 [87%], 2022 0.1 [1%], 2014
Wet Hours 03.5 hrs (36%) [1.8%] 6, 2023 0, 2009
Cloud Cover am: Overcast transitioned to Mostly Sunny
pm: Partly Cloudy
Events None
Comments -
Extra Comments
Issues None known
Observer Absent? No
Pond Temperature (Heath) 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 8th August 2015.
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