Daily Report for 2nd October 2011

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 11.8 °C (+1.8) 07:16 12.1 °C (+2.1) 16.3 °C (+6.3), 2023 5.2 °C (-4.8), 2019
Maximum Temperature 26.6 °C (+9.9) 15:08 26.9 °C (+10.2) 26.6 °C (+9.9), 2011 13.2 °C (-3.5), 2019
Mean Temperature 19.4 °C (+5.9) 19.4 °C (+6.2) 19.4 °C, 2011 9.2 °C, 2019
Minimum Humidity 36% 16:26 38% 85%, 2020 36%, 2011
Maximum Humidity 93% 08:29 94% 98%, 2010 80%, 2009
Mean Humidity 63% 66% 93%, 2020 63%, 2011
Minimum Pressure 1022 hPa 19:57 1023 hPa 1026 hPa, 2014 985 hPa, 2021
Maximum Pressure 1025 hPa 05:22 1026 hPa 1029 hPa, 2014 993 hPa, 2020
Mean Pressure 1024 hPa 1024 hPa 1028 hPa, 2014 990 hPa, 2020
Mean Wind Speed 3.0 mph (-1.1) 2.1 mph (-2.0) 9.0 mph, 2017 1.8 mph, 2014
Maximum Wind Speed 11.5 mph 9.8 mph 17.4 mph, 2020 7.8 mph, 2014
Maximum Gust 16.1 mph 14:10 13.1 mph 30.0 mph, 2020 9.7 mph, 2014
Mean Wind Direction SW
Rainfall 0.0 mm 0.0 mm (0%) 31.0 mm, 2020
Maximum Hourly Rain n/a 11.2, 2010
Maximum 10-min Rain n/a 2.7, 2023
Maximum Rain Rate n/a 48, 2024
Minimum Dew Point 9.6 °C 20:59 10.1 °C 15.0 °C, 2023 3.4 °C, 2019
Maximum Dew Point 16.4 °C 09:22 16.2 °C 17.4 °C, 2023 8.7 °C, 2019
Mean Dew Point 11.3 °C 11.9 °C 16.2 °C, 2023 5.5 °C, 2019
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 11.8 °C 07:09 12.1 °C 16.3 °C, 2023 6.2 °C, 2019
Day Maximum (09-21) 26.6 °C 15:07 26.9 °C 26.6 °C, 2011 12.7 °C, 2020
Max 10m Temp Rise 1.0 °C 09:00 0.9 °C 1.0 °C, 2011 0.2 °C, 2020
Max 1hr Temp Rise 5.0 °C 09:17 4.7 °C 5.0 °C, 2011 0.8 °C, 2020
Max 1hr Hum Rise 12% 20:49 11% 12%, 2011 4%, 2020
Max 10m Temp Fall 0.5 °C 20:08 0.3 °C 0.7 °C, 2022 0.3 °C, 2013
Max 1hr Temp Fall 1.1 °C 21:01 0.9 °C 2.8 °C, 2016 0.7 °C, 2023
Max 1hr Hum Fall 10% 10:04 7% 14%, 2019 4%, 2020
Max 10m Wind Speed 8.1 mph 15:47 7.0 mph 14.3 mph, 2017 5.6 mph, 2010
Minimum Feels-like 13.1 °C 07:09 13.6 °C 20.5 °C, 2023 2.5 °C, 2019
Maximum Feels-like 29.0 °C 14:44 29.6 °C 29.0 °C, 2011 13.2 °C, 2019
Mean Feels-like 21.6 °C 21.7 °C 22.4 °C, 2023 8.5 °C, 2019
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 14.8 °C (+8.1) 14.8 °C (+8.1) 14.8 °C (+8.1), 2011 3.2 °C (-3.5), 2023
Humidity Range 57% 56% 57%, 2011 11%, 2020
Pressure Range 3 hPa 2 hPa 28 hPa, 2021 3 hPa, 2011
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 10.4 [100%]21 hrs (249%) [100%] 10.4 [100%], 2011 0 [0%], 2020
Wet Hours 00 hrs (0%) [0%] 20, 2020 0, 2009
Cloud Cover Sunny
Events Maximum possible sunshine
Comments -
Extra Comments
Issues Data Loss (1645-2000) - temp/hum data reconstructed with probable small error
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 2nd October 2011.
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

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Webcam Summary of Cloud Conditions

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Wind rose