Daily Report for 14th July 2018

<<Previous Day
Reset 		Next Day>>
Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 13.9 °C (-0.4) 05:35 15.1 °C (+1.3) 16.9 °C (+2.6), 2013 11.7 °C (-2.6), 2011
Maximum Temperature 26.9 °C (+3.8) 17:16 27.2 °C (+4.4) 28.2 °C (+5.1), 2013 16.9 °C (-6.2), 2012
Mean Temperature 21.4 °C (+1.7) 21.2 °C (+2.8) 23.2 °C, 2013 14.6 °C, 2012
Minimum Humidity 42% 17:15 39% 73%, 2023 34%, 2011
Maximum Humidity 95% 06:01 85% 95%, 2018 72%, 2011
Mean Humidity 66% 62% 88%, 2012 56%, 2011
Minimum Pressure 1018 hPa 20:13 1019 hPa 1023 hPa, 2019 999 hPa, 2012
Maximum Pressure 1023 hPa 00:01 1023 hPa 1026 hPa, 2022 1007 hPa, 2010
Mean Pressure 1021 hPa 1021 hPa 1024 hPa, 2019 1004 hPa, 2010
Mean Wind Speed 2.3 mph (-2.0) 3.2 mph (-1.1) 7.5 mph, 2009 2.0 mph, 2013
Maximum Wind Speed 9.2 mph 18:33 10.5 mph 15.6 mph, 2014 7.8 mph, 2013
Maximum Gust 16.1 mph 20:43 16.0 mph 27.0 mph, 2009 10.2 mph, 2013
Mean Wind Direction S
Rainfall 0.0 mm 18.4 mm (89%) 7.2 mm, 2023
Maximum Hourly Rain n/a 2.9, 2019
Maximum 10-min Rain n/a 2, 2012
Maximum Rain Rate n/a 30, 2012
Minimum Dew Point 12.8 °C 05:28 10.4 °C 14.3 °C, 2015 5.3 °C, 2011
Maximum Dew Point 16.6 °C 10:02 15.4 °C 17.5 °C, 2023 10.0 °C, 2011
Mean Dew Point 14.2 °C 12.9 °C 15.2 °C, 2015 7.5 °C, 2011
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 13.9 °C 05:36 15.1 °C 16.9 °C, 2013 11.7 °C, 2011
Day Maximum (09-21) 26.9 °C 17:17 27.2 °C 28.2 °C, 2013 15.7 °C, 2012
Max 10m Temp Rise 0.7 °C 07:02 0.6 °C 0.7 °C, 2014 0.3 °C, 2023
Max 1hr Temp Rise 2.9 °C 07:45 2.6 °C 2.9 °C, 2018 1.0 °C, 2023
Max 1hr Hum Rise 8% 19:25 13% 13%, 2023 5%, 2020
Max 10m Temp Fall 0.5 °C 14:10 0.6 °C 0.7 °C, 2016 0.4 °C, 2014
Max 1hr Temp Fall 1.5 °C 19:32 2.3 °C 2.8 °C, 2016 1.1 °C, 2023
Max 1hr Hum Fall 13% 07:25 12% 13%, 2018 7%, 2015
Max 10m Wind Speed 7.1 mph 21:03 7.9 mph 11.2 mph, 2016 5.4 mph, 2013
Minimum Feels-like 16.6 °C 05:22 17.4 °C 20.4 °C, 2015 11.7 °C, 2011
Maximum Feels-like 31.1 °C 13:58 30.3 °C 31.2 °C, 2013 19.6 °C, 2012
Mean Feels-like 24.9 °C 24.1 °C 26.3 °C, 2013 16.8 °C, 2016
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 13.0 °C (+4.1) 12.1 °C (+3.1) 13.0 °C (+4.1), 2018 3.1 °C (-5.7), 2023
Humidity Range 53% 45% 53%, 2018 21%, 2015
Pressure Range 5 hPa 4 hPa 16 hPa, 2023 1 hPa, 2009
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 10 [68%]143 hrs (160%) [69%] 12 [81%], 2022 0 [0%], 2023
Wet Hours 04.5 hrs (29%) [1.3%] 8, 2012 0, 2011
Cloud Cover am: Sunny
pm: Partly Cloudy
Events None
Comments -
Extra Comments delayed tip removed
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 14th July 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.
View monthly summary

Daily Graph of Conditions

day graph

Webcam Summary of Cloud Conditions

daycamsumFull resolution individual images at up-to 5 minute intervals

Wind rose