Daily Report for 22nd October 2018

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 5.6 °C (-2.5) 20:32 9.9 °C (+0.9) 13.7 °C (+5.6), 2013 5.0 °C (-3.1), 2010
Maximum Temperature 12.4 °C (-1.7) 00:04 17.6 °C (+2.3) 17.9 °C (+3.8), 2013 12.4 °C (-1.7), 2018
Mean Temperature 9.5 °C (-2.1) 13.5 °C (+1.6) 16.4 °C, 2013 8.8 °C, 2010
Minimum Humidity 58% 16:19 67% 98%, 2012 47%, 2011
Maximum Humidity 86% 20:42 92% 98%, 2009 77%, 2011
Mean Humidity 74% 82% 98%, 2012 64%, 2011
Minimum Pressure 1031 hPa 00:01 1017 hPa 1031 hPa, 2018 993 hPa, 2013
Maximum Pressure 1038 hPa 12:08 1023 hPa 1038 hPa, 2018 1004 hPa, 2009
Mean Pressure 1036 hPa 1020 hPa 1036 hPa, 2018 997 hPa, 2013
Mean Wind Speed 3.3 mph (-0.8) 4.1 mph (-0.0) 8.6 mph, 2017 1.5 mph, 2019
Maximum Wind Speed 11.4 mph 03:15 12.3 mph 18.4 mph, 2017 5.8 mph, 2009
Maximum Gust 19.6 mph 03:11 19.9 mph 28.8 mph, 2017 9.2 mph, 2009
Mean Wind Direction N
Rainfall 0.0 mm 33.1 mm (72%) 5.1 mm, 2013
Maximum Hourly Rain n/a 2.7, 2013
Maximum 10-min Rain n/a 1.8, 2013
Maximum Rain Rate n/a 72, 2013
Minimum Dew Point 3.0 °C 20:14 7.8 °C 11.6 °C, 2013 0.7 °C, 2014
Maximum Dew Point 9.4 °C 00:05 12.6 °C 15.4 °C, 2013 6.7 °C, 2011
Mean Dew Point 4.9 °C 10.2 °C 14.0 °C, 2013 4.3 °C, 2011
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 6.9 °C * 07:43 10.4 °C 16.1 °C, 2013 5.0 °C, 2010
Day Maximum (09-21) * 12.3 °C * 14:26 17.2 °C 17.9 °C, 2013 12.3 °C, 2018
Max 10m Temp Rise 0.6 °C 22:02 0.5 °C 0.9 °C, 2009 0.1 °C, 2012
Max 1hr Temp Rise 1.8 °C 10:45 1.9 °C 2.7 °C, 2019 0.4 °C, 2012
Max 1hr Hum Rise 12% 18:46 7% 12%, 2017 0%, 2012
Max 10m Temp Fall 0.6 °C 18:14 0.4 °C 0.8 °C, 2009 0.1 °C, 2012
Max 1hr Temp Fall 2.7 °C 18:59 1.6 °C 2.8 °C, 2019 0.3 °C, 2012
Max 1hr Hum Fall 8% 03:09 8% 17%, 2009 0%, 2012
Max 10m Wind Speed 8.6 mph 03:15 8.9 mph 15.0 mph, 2017 5.8 mph, 2019
Minimum Feels-like 3.6 °C 07:42 9.7 °C 15.9 °C, 2013 1.2 °C, 2021
Maximum Feels-like 13.4 °C 00:01 20.0 °C 21.9 °C, 2013 12.5 °C, 2010
Mean Feels-like 8.9 °C 14.9 °C 19.8 °C, 2013 7.9 °C, 2010
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 6.8 °C (+0.8) 7.6 °C (+1.3) 8.5 °C (+2.5), 2019 3.1 °C (-2.9), 2012
Humidity Range 28% 25% 35%, 2019 0%, 2012
Pressure Range 7 hPa 6 hPa 15 hPa, 2017 4 hPa, 2019
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 9.3 [101%]110 hrs (128%) [51%] 9.3 [101%], 2018 0 [0%], 2012
Wet Hours 028 hrs (79%) [5.2%] 2, 2012 0, 2009
Cloud Cover Sunny
Events Maximum possible sunshine
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 22nd 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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