Daily Report for 14th October 2018

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 9.7 °C (+0.8) 20:14 10.7 °C (+1.3) 13.8 °C (+4.9), 2017 2.7 °C (-6.2), 2012
Maximum Temperature 19.9 °C (+4.8) 00:00 18.7 °C (+2.8) 19.9 °C (+4.8), 2018 10.8 °C (-4.3), 2013
Mean Temperature 13.3 °C (+2.8) 14.3 °C (+2.1) 16.9 °C, 2017 7.4 °C, 2012
Minimum Humidity 78% 05:51 65% 94%, 2014 47%, 2011
Maximum Humidity 96% 23:41 90% 97%, 2014 82%, 2016
Mean Humidity 90% 79% 96%, 2014 67%, 2011
Minimum Pressure 1005 hPa 11:00 1014 hPa 1030 hPa, 2025 999 hPa, 2014
Maximum Pressure 1009 hPa 20:02 1020 hPa 1033 hPa, 2009 1004 hPa, 2012
Mean Pressure 1007 hPa 1017 hPa 1032 hPa, 2009 1002 hPa, 2012
Mean Wind Speed 4.6 mph (+0.5) 5.0 mph (+0.9) 5.1 mph, 2017 0.8 mph, 2009
Maximum Wind Speed 12.8 mph 14:36 13.7 mph 13.7 mph, 2019 4.7 mph, 2009
Maximum Gust 19.6 mph 13:00 22.2 mph 20.7 mph, 2020 5.8 mph, 2009
Mean Wind Direction NNW
Rainfall 12.5 mm 21.5 mm (73%) 12.7 mm, 2024
Maximum Hourly Rain 4.6 mm 23:59 5.3 mm, 2024
Maximum 10-min Rain 1.3 mm 12:02 1.7 mm, 2024
Maximum Rain Rate 13 mm/h 06:41 18 mm/h, 2013
Minimum Dew Point 8.9 °C 20:15 8.2 °C 12.2 °C, 2017 2.0 °C, 2012
Maximum Dew Point 16.1 °C 00:00 12.9 °C 16.1 °C, 2018 7.4 °C, 2012
Mean Dew Point 11.6 °C 10.6 °C 14.1 °C, 2017 3.9 °C, 2012
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 13.4 °C * 08:57 11.3 °C 15.6 °C, 2017 2.7 °C, 2012
Day Maximum (09-21) * 13.4 °C * 09:01 18.1 °C 19.6 °C, 2017 10.8 °C, 2013
Max 10m Temp Rise 0.2 °C 11:53 0.5 °C 0.7 °C, 2012 0.2 °C, 2010
Max 1hr Temp Rise 0.3 °C 23:18 1.8 °C 2.9 °C, 2012 0.3 °C, 2018
Max 1hr Hum Rise 9% 07:16 7% 10%, 2017 1%, 2014
Max 10m Temp Fall 0.4 °C 02:43 0.5 °C 0.7 °C, 2020 0.1 °C, 2014
Max 1hr Temp Fall 1.2 °C 03:28 1.5 °C 1.6 °C, 2023 0.3 °C, 2024
Max 1hr Hum Fall 3% 05:50 7% 14%, 2012 1%, 2014
Max 10m Wind Speed 9.5 mph 14:39 10.2 mph 10.3 mph, 2019 5.0 mph, 2010
Minimum Feels-like 6.2 °C 21:34 10.4 °C 16.2 °C, 2017 0.0 °C, 2009
Maximum Feels-like 24.6 °C 00:00 21.4 °C 24.6 °C, 2018 0.0 °C, 2009
Mean Feels-like 14.9 °C 15.8 °C 20.4 °C, 2017 0.0 °C, 2009
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 10.2 °C (+3.9) 8.0 °C (+1.5) 10.2 °C (+3.9), 2018 1.7 °C (-4.6), 2010
Humidity Range 18% 26% 39%, 2011 3%, 2014
Pressure Range 4 hPa 6 hPa 15 hPa, 2023 2 hPa, 2025
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0 [0%]64 hrs (113%) [45%] 9 [93%], 2011 0 [0%], 2010
Wet Hours 12
[Mean rain rate: 1.0 mm/h]		21 hrs (93%) [6.1%] 12, 2018 0, 2010
Cloud Cover Overcast
Events None
Comments lotsa rain; diurnal range of 0.0. Wow
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 14th October 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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Daily Graph of Conditions

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Webcam Summary of Cloud Conditions

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