Daily Report for 1st March 2009

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 3.2 °C (-0.2) 01:30 3.2 °C (-0.2) 8.0 °C (+4.6), 2019 -4.8 °C (-8.2), 2018
Maximum Temperature 10.9 °C (+1.4) 14:22 10.9 °C (+1.3) 14.4 °C (+4.9), 2012 0.0 °C (-9.5), 2018
Mean Temperature 7.0 °C (+0.6) 7.0 °C (+0.6) 9.9 °C, 2012 -2.8 °C, 2018
Minimum Humidity 62% 14:48 62% 91%, 2022 47%, 2015
Maximum Humidity 88% 09:13 88% 98%, 2014 84%, 2017
Mean Humidity 75% 75% 94%, 2022 68%, 2015
Minimum Pressure 1006 hPa 05:50 1006 hPa 1035 hPa, 2011 988 hPa, 2020
Maximum Pressure 1011 hPa 23:43 1011 hPa 1039 hPa, 2011 991 hPa, 2020
Mean Pressure 1008 hPa 1008 hPa 1037 hPa, 2011 990 hPa, 2020
Mean Wind Speed 4.5 mph (-0.7) 4.5 mph (-0.7) 12.5 mph, 2018 1.9 mph, 2014
Maximum Wind Speed n/a 0.0 mph 22, 2018 7.1, 2012
Maximum Gust 21.0 mph 21.0 mph 33.4 mph, 2018 8.7 mph, 2012
Mean Wind Direction n/a
Rainfall 0.0 mm 0.0 mm (0%) 9.1 mm, 2022
Maximum Hourly Rain n/a 3.2, 2015
Maximum 10-min Rain n/a 2.6, 2015
Maximum Rain Rate n/a 30, 2015
Minimum Dew Point 0.9 °C 23:01 0.9 °C 5.8 °C, 2022 -8.4 °C, 2018
Maximum Dew Point 6.1 °C 13:45 6.1 °C 10.7 °C, 2016 -3.6 °C, 2018
Mean Dew Point 2.9 °C 2.9 °C 6.8 °C, 2022 -5.8 °C, 2018
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 3.2 °C 3.2 °C 8.1 °C, 2019 -5.1 °C, 2018
Day Maximum (09-21) 10.9 °C 10.9 °C 14.4 °C, 2012 0.0 °C, 2018
Max 10m Temp Rise n/a 10:34 0.0 °C 0.6, 2011 0.2, 2022
Max 1hr Temp Rise n/a 14:00 0.0 °C 2.1, 2010 0.4, 2011
Max 1hr Hum Rise n/a 18:50 0% 21, 2015 2, 2022
Max 10m Temp Fall n/a 10:24 0.0 °C 0.8, 2015 0.2, 2013
Max 1hr Temp Fall n/a 18:41 0.0 °C 2.4, 2015 0.7, 2013
Max 1hr Hum Fall n/a 14:17 0% 24, 2015 2, 2022
Max 10m Wind Speed n/a 0.0 mph 18.1, 2015 5.7, 2014
Minimum Feels-like n/a 0.0 °C 5, 2012 -14.2, 2018
Maximum Feels-like n/a 0.0 °C 14.6, 2012 -5.7, 2018
Mean Feels-like n/a 0.0 °C 9.8, 2012 -10.1, 2018
Air-frost Hrs 0 hrs 0 hrs 24 hrs, 2018 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 7.7 °C (+1.6) 7.7 °C (+1.5) 9.5 °C (+3.4), 2010 1.9 °C (-4.2), 2011
Humidity Range 26% 26% 49%, 2015 4%, 2022
Pressure Range 5 hPa 5 hPa 21 hPa, 2016 3 hPa, 2020
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0.2 [2%]0.2 hrs (6%) [2%] 9 [92%], 2012 0 [0%], 2011
Wet Hours 0 hrs (0%) [0%] 14, 2022 , 2009
Cloud Cover not available
Events None
Comments -
Extra Comments
Issues None known
Observer Absent? No
Pond Temperature (Heath) 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 1st March 2009.
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

daygraph daygraph 2 daygraph-wdir

Webcam Summary of Cloud Conditions


Webcam summary not available for this day

Wind rose