Daily Report for 5th October 2018

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 11.8 °C (+2.1) 01:50 10.5 °C (+0.7) 15.8 °C (+6.1), 2011 3.6 °C (-6.1), 2014
Maximum Temperature 20.6 °C (+4.3) 15:24 18.4 °C (+2.0) 20.6 °C (+4.3), 2018 14.2 °C (-2.1), 2009
Mean Temperature 15.3 °C (+3.2) 14.1 °C (+1.4) 17.3 °C, 2011 9.6 °C, 2014
Minimum Humidity 63% 15:36 63% 80%, 2009 50%, 2014
Maximum Humidity 94% 04:12 90% 98%, 2014 78%, 2016
Mean Humidity 83% 78% 89%, 2010 64%, 2016
Minimum Pressure 1012 hPa 23:57 1019 hPa 1028 hPa, 2016 989 hPa, 2020
Maximum Pressure 1021 hPa 00:04 1025 hPa 1032 hPa, 2016 1000 hPa, 2020
Mean Pressure 1016 hPa 1022 hPa 1030 hPa, 2016 996 hPa, 2020
Mean Wind Speed 1.3 mph (-2.8) 4.2 mph (+0.1) 9.8 mph, 2022 1.1 mph, 2009
Maximum Wind Speed 7.1 mph 16:01 11.7 mph 22.1 mph, 2016 5.3 mph, 2009
Maximum Gust 11.5 mph 16:02 18.3 mph 35.7 mph, 2022 7.4 mph, 2009
Mean Wind Direction SSW
Rainfall 0.0 mm 0.0 mm (0%) 18.2 mm, 2021
Maximum Hourly Rain n/a 11, 2021
Maximum 10-min Rain n/a 2.9, 2021
Maximum Rain Rate n/a 42, 2021
Minimum Dew Point 10.4 °C 01:35 7.7 °C 12.4 °C, 2011 3.0 °C, 2014
Maximum Dew Point 14.4 °C 14:16 12.2 °C 15.9 °C, 2015 9.7 °C, 2014
Mean Dew Point 12.3 °C 10.1 °C 13.6 °C, 2015 5.2 °C, 2014
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 11.8 °C 01:51 10.7 °C 15.8 °C, 2011 3.6 °C, 2014
Day Maximum (09-21) 20.6 °C 15:25 18.4 °C 20.6 °C, 2018 14.2 °C, 2009
Max 10m Temp Rise 0.5 °C 12:18 0.6 °C 0.8 °C, 2014 0.2 °C, 2010
Max 1hr Temp Rise 2.1 °C 12:24 1.9 °C 3.5 °C, 2014 0.8 °C, 2010
Max 1hr Hum Rise 9% 18:43 7% 15%, 2020 4%, 2010
Max 10m Temp Fall 0.5 °C 18:26 0.6 °C 1.4 °C, 2017 0.1 °C, 2015
Max 1hr Temp Fall 2.2 °C 19:58 1.8 °C 3.9 °C, 2012 0.3 °C, 2015
Max 1hr Hum Fall 8% 15:01 8% 19%, 2012 1%, 2015
Max 10m Wind Speed 5.2 mph 16:08 9.1 mph 18.1 mph, 2022 5.0 mph, 2014
Minimum Feels-like 13.3 °C 01:44 10.8 °C 18.3 °C, 2011 0.0 °C, 2009
Maximum Feels-like 23.8 °C 15:19 20.8 °C 23.8 °C, 2018 0.0 °C, 2009
Mean Feels-like 17.7 °C 15.5 °C 20.3 °C, 2011 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 8.8 °C (+2.2) 7.9 °C (+1.3) 11.3 °C (+4.7), 2014 3.0 °C (-3.6), 2009
Humidity Range 31% 27% 48%, 2014 14%, 2009
Pressure Range 10 hPa 7 hPa 14 hPa, 2022 3 hPa, 2023
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 5 [49%]21 hrs (102%) [41%] 9 [88%], 2014 0 [0%], 2015
Wet Hours 00 hrs (0%) [0%] 13, 2012 0, 2013
Cloud Cover am: Overcast transitioned to Sunny
pm: Mostly Sunny transitioned to Partly Cloudy
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 5th 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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