Daily Report for 3rd July 2012

<<Previous Day
Reset 		Next Day>>
Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 15.4 °C (+2.0) 03:22 13.4 °C (-0.0) 18.6 °C (+5.2), 2009 11.4 °C (-2.0), 2016
Maximum Temperature 19.0 °C (-3.5) 14:35 18.9 °C (-3.6) 26.3 °C (+3.8), 2014 19.0 °C (-3.5), 2012
Mean Temperature 16.9 °C (-0.8) 16.0 °C (-1.8) 21.0 °C, 2014 15.5 °C, 2024
Minimum Humidity 75% 14:52 60% 75%, 2012 28%, 2014
Maximum Humidity 96% 08:05 89% 96%, 2012 66%, 2011
Mean Humidity 89% 77% 89%, 2012 46%, 2014
Minimum Pressure 1012 hPa 21:45 1012 hPa 1027 hPa, 2019 1003 hPa, 2013
Maximum Pressure 1014 hPa 05:49 1017 hPa 1030 hPa, 2025 1013 hPa, 2023
Mean Pressure 1013 hPa 1013 hPa 1029 hPa, 2025 1008 hPa, 2013
Mean Wind Speed 5.2 mph (+0.9) 6.3 mph (+2.0) 8.7 mph, 2023 2.2 mph, 2022
Maximum Wind Speed 10.7 mph 14:35 15.0 mph 23.5 mph, 2020 7.4 mph, 2011
Maximum Gust 16.8 mph 12:53 21.9 mph 34.6 mph, 2023 9.8 mph, 2011
Mean Wind Direction SSW
Rainfall 2.8 mm 6.3 mm (142%) 2.8 mm, 2012
Maximum Hourly Rain 1.2 mm 07:11 1.2 mm, 2012
Maximum 10-min Rain 0.4 mm 06:41 1.0 mm, 2024
Maximum Rain Rate 4.6 mm/h 06:25 14 mm/h, 2024
Minimum Dew Point 14.1 °C 15:27 9.8 °C 14.1 °C, 2012 4.3 °C, 2014
Maximum Dew Point 16.4 °C 12:29 13.6 °C 17.6 °C, 2009 9.5 °C, 2025
Mean Dew Point 15.0 °C 11.6 °C 15.1 °C, 2021 7.2 °C, 2025
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 15.4 °C 03:24 13.4 °C 18.6 °C, 2009 11.4 °C, 2016
Day Maximum (09-21) 19.0 °C 14:37 18.9 °C 26.3 °C, 2014 19.0 °C, 2012
Max 10m Temp Rise 0.4 °C 09:03 0.6 °C 0.9 °C, 2018 0.4 °C, 2012
Max 1hr Temp Rise 1.1 °C 09:17 1.6 °C 3.2 °C, 2025 1.1 °C, 2012
Max 1hr Hum Rise 6% 16:03 10% 18%, 2023 5%, 2009
Max 10m Temp Fall 0.3 °C 15:27 0.5 °C 1.0 °C, 2023 0.3 °C, 2012
Max 1hr Temp Fall 0.9 °C 15:50 1.4 °C 3.0 °C, 2023 0.9 °C, 2012
Max 1hr Hum Fall 8% 13:24 10% 14%, 2015 8%, 2012
Max 10m Wind Speed 10.4 mph 14:44 13.1 mph 15.8 mph, 2023 6.2 mph, 2011
Minimum Feels-like 18.9 °C 01:48 15.1 °C 19.7 °C, 2021 11.7 °C, 2016
Maximum Feels-like 23.3 °C 12:30 21.0 °C 27.7 °C, 2015 22.1 °C, 2016
Mean Feels-like 20.9 °C 18.1 °C 22.6 °C, 2021 17.6 °C, 2016
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 3.6 °C (-5.5) 5.5 °C (-3.6) 13.7 °C (+4.6), 2015 3.6 °C (-5.5), 2012
Humidity Range 21% 29% 51%, 2009 20%, 2021
Pressure Range 2 hPa 5 hPa 13 hPa, 2013 2 hPa, 2011
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0 [0%]8.5 hrs (44%) [19%] 15.1 [100%], 2018 0 [0%], 2012
Wet Hours 7
[Mean rain rate: 0.4 mm/h]		13 hrs (398%) [18%] 7, 2012 0, 2009
Cloud Cover Overcast
Events None
Comments -01, 05-08 Light Rain/Showers; 12-21 Light Drizzle/Rain spells
Extra Comments
Issues None known
Observer Absent? No
Pond Temperature @ Hampstead Heath 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 3rd July 2012.
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

daycamsum

Wind rose