Daily Report for 10th March 2009

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 4.0 °C (+0.1) 21:20 2.5 °C (-1.2) 10.2 °C (+6.3), 2020 -0.3 °C (-4.2), 2023
Maximum Temperature 12.0 °C (+1.7) 13:23 10.7 °C (+0.7) 15.7 °C (+5.4), 2022 3.0 °C (-7.3), 2013
Mean Temperature 8.0 °C (+0.9) 6.6 °C (-0.2) 12.6 °C, 2020 1.9 °C, 2013
Minimum Humidity 68% 11:35 53% 92%, 2024 40%, 2019
Maximum Humidity 97% 05:20 94% 97%, 2009 77%, 2010
Mean Humidity 82% 73% 94%, 2024 67%, 2015
Minimum Pressure 1004 hPa 06:18 998 hPa 1035 hPa, 2012 982 hPa, 2023
Maximum Pressure 1018 hPa 22:59 1009 hPa 1039 hPa, 2012 998 hPa, 2018
Mean Pressure 1011 hPa 1003 hPa 1037 hPa, 2012 996 hPa, 2018
Mean Wind Speed 3.3 mph (-1.9) 5.8 mph (+0.6) 12.8 mph, 2021 2.6 mph, 2016
Maximum Wind Speed n/a 0.0 mph 29, 2019 8.3, 2024
Maximum Gust 15.0 mph 23.6 mph 47.2 mph, 2019 11.5 mph, 2024
Mean Wind Direction n/a
Rainfall 3.9 mm 24.2 mm (192%) 9.7 mm, 2019
Maximum Hourly Rain 1.5 mm 02:58 3.5 mm, 2019
Maximum 10-min Rain 0.8 mm 14:33 1.1 mm, 2019
Maximum Rain Rate n/a 14:30 6.6, 2019
Minimum Dew Point 2.0 °C 20:53 -0.8 °C 8.1 °C, 2020 -3.4 °C, 2019
Maximum Dew Point 7.9 °C 08:36 5.2 °C 11.9 °C, 2020 -0.1 °C, 2010
Mean Dew Point 5.1 °C 2.0 °C 10.3 °C, 2020 -1.4 °C, 2010
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 5.8 °C * 3.0 °C 8.7 °C, 2012 1.9 °C, 2013
Day Maximum (09-21) 12.0 °C 10.7 °C 15.7 °C, 2022 3.0 °C, 2013
Max 10m Temp Rise n/a 13:21 0.0 °C 0.9, 2019 0.1, 2013
Max 1hr Temp Rise n/a 13:23 0.0 °C 2.7, 2014 0.4, 2013
Max 1hr Hum Rise n/a 14:46 0% 30, 2019 2, 2024
Max 10m Temp Fall n/a 17:33 0.0 °C 1.7, 2019 0.2, 2010
Max 1hr Temp Fall n/a 15:22 0.0 °C 4.6, 2019 0.4, 2021
Max 1hr Hum Fall n/a 09:51 0% 22, 2019 2, 2010
Max 10m Wind Speed n/a 0.0 mph 20.3, 2019 6.3, 2016
Minimum Feels-like n/a 0.0 °C 10.9, 2020 -7.2, 2013
Maximum Feels-like n/a 0.0 °C 17.1, 2020 0.5, 2013
Mean Feels-like n/a 0.0 °C 14, 2020 -2.5, 2013
Air-frost Hrs 0 hrs 0.1 hrs 2 hrs, 2023 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 8.0 °C (+1.6) 8.2 °C (+1.9) 9.6 °C (+3.2), 2023 1.9 °C (-4.5), 2024
Humidity Range 29% 41% 57%, 2019 4%, 2024
Pressure Range 14 hPa 10 hPa 29 hPa, 2023 3 hPa, 2010
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 2.3 [22%]46 hrs (132%) [45%] 9 [87%], 2015 0 [0%], 2013
Wet Hours 0 hrs (0%) [0%] 14, 2024 , 2009
Cloud Cover not available
Events None
Comments ~0130-04 & 1430-15 L. Rain
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 10th 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

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Webcam Summary of Cloud Conditions


Webcam summary not available for this day

Wind rose