Daily Report for 17th October 2016

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 10.4 °C (+1.9) 23:56 8.7 °C (-0.4) 13.6 °C (+5.1), 2014 3.5 °C (-5.0), 2010
Maximum Temperature 16.6 °C (+2.0) 12:45 15.6 °C (+0.1) 18.7 °C (+4.1), 2014 12.0 °C (-2.6), 2010
Mean Temperature 13.1 °C (+1.9) 12.0 °C (-0.2) 16.0 °C, 2014 7.6 °C, 2010
Minimum Humidity 64% 16:37 60% 83%, 2018 49%, 2010
Maximum Humidity 85% 01:51 82% 96%, 2012 84%, 2010
Mean Humidity 78% 74% 90%, 2018 68%, 2010
Minimum Pressure 1014 hPa 01:29 1017 hPa 1028 hPa, 2009 993 hPa, 2012
Maximum Pressure 1021 hPa 22:51 1023 hPa 1033 hPa, 2009 1003 hPa, 2012
Mean Pressure 1017 hPa 1019 hPa 1030 hPa, 2009 997 hPa, 2012
Mean Wind Speed 7.2 mph (+3.1) 4.5 mph (+0.4) 7.6 mph, 2023 1.2 mph, 2020
Maximum Wind Speed 18.2 mph 13:17 15.2 mph 18.5 mph, 2012 6.1 mph, 2025
Maximum Gust 27.4 mph 12:48 24.4 mph 29.7 mph, 2011 9.2 mph, 2025
Mean Wind Direction SW
Rainfall 1.3 mm 38.3 mm (107%) 9.5 mm, 2012
Maximum Hourly Rain 0.8 mm 18:23 4.0 mm, 2012
Maximum 10-min Rain 0.6 mm 17:27 1.7 mm, 2012
Maximum Rain Rate 18 mm/h 17:27 30 mm/h, 2012
Minimum Dew Point 7.6 °C 23:49 5.0 °C 13.0 °C, 2014 0.0 °C, 2010
Maximum Dew Point 12.2 °C 11:50 9.8 °C 15.8 °C, 2024 5.0 °C, 2009
Mean Dew Point 9.4 °C 7.4 °C 14.1 °C, 2014 1.9 °C, 2010
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 10.7 °C * 06:07 8.9 °C 14.7 °C, 2022 5.5 °C, 2010
Day Maximum (09-21) 16.6 °C 12:45 15.6 °C 18.7 °C, 2014 12.0 °C, 2010
Max 10m Temp Rise 0.5 °C 10:57 0.6 °C 0.7 °C, 2010 0.2 °C, 2018
Max 1hr Temp Rise 2.0 °C 11:26 2.1 °C 3.4 °C, 2011 0.7 °C, 2018
Max 1hr Hum Rise 9% 18:24 7% 16%, 2012 2%, 2025
Max 10m Temp Fall 0.7 °C 17:31 0.4 °C 1.0 °C, 2012 0.2 °C, 2014
Max 1hr Temp Fall 2.2 °C 18:17 1.5 °C 2.7 °C, 2010 0.5 °C, 2025
Max 1hr Hum Fall 7% 14:13 8% 14%, 2019 3%, 2018
Max 10m Wind Speed 13.3 mph 12:52 11.3 mph 14.2 mph, 2017 3.0 mph, 2020
Minimum Feels-like 10.6 °C 23:53 7.1 °C 16.4 °C, 2014 0.0 °C, 2009
Maximum Feels-like 18.9 °C 12:28 16.5 °C 22.4 °C, 2014 0.0 °C, 2009
Mean Feels-like 14.1 °C 12.3 °C 19.4 °C, 2014 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 6.2 °C (+0.1) 6.9 °C (+0.5) 8.5 °C (+2.4), 2010 2.6 °C (-3.5), 2015
Humidity Range 21% 22% 40%, 2012 12%, 2018
Pressure Range 7 hPa 6 hPa 16 hPa, 2022 2 hPa, 2025
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 5 [53%]74 hrs (110%) [44%] 6 [63%], 2010 0 [0%], 2018
Wet Hours 1
[Mean rain rate: 1.3 mm/h]		22 hrs (82%) [5.4%] 5, 2012 0, 2009
Cloud Cover Mostly Sunny with periods of Partly Cloudy
Events None
Comments 17 Shower
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 17th October 2016.
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