Daily Report for 5th March 2012

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 3.4 °C (-0.2) 03:56 4.7 °C (+1.2) 5.6 °C (+2.0), 2017 -2.6 °C (-6.2), 2010
Maximum Temperature 9.1 °C (-0.9) 15:09 11.2 °C (+1.3) 15.3 °C (+5.3), 2013 4.4 °C (-5.6), 2023
Mean Temperature 5.9 °C (-0.6) 7.8 °C (+1.3) 8.3 °C, 2013 2.9 °C, 2016
Minimum Humidity 41% 14:55 59% 90%, 2020 41%, 2012
Maximum Humidity 79% 07:10 92% 96%, 2014 78%, 2015
Mean Humidity 62% 79% 92%, 2020 62%, 2012
Minimum Pressure 1019 hPa 07:13 1018 hPa 1036 hPa, 2015 982 hPa, 2009
Maximum Pressure 1023 hPa 23:12 1025 hPa 1040 hPa, 2015 991 hPa, 2018
Mean Pressure 1021 hPa 1022 hPa 1038 hPa, 2015 989 hPa, 2018
Mean Wind Speed 10.0 mph (+4.8) 5.5 mph (+0.3) 10.0 mph, 2012 2.6 mph, 2013
Maximum Wind Speed 19.2 mph 12.9 mph 19.2 mph, 2012 8.0 mph, 2024
Maximum Gust 30.1 mph 11:43 19.3 mph 30.1 mph, 2012 12.3 mph, 2013
Mean Wind Direction NNW
Rainfall 0.0 mm 11.3 mm (180%) 12.4 mm, 2020
Maximum Hourly Rain n/a 8.5, 2017
Maximum 10-min Rain n/a 2.6, 2017
Maximum Rain Rate n/a 36, 2017
Minimum Dew Point -3.6 °C 14:56 0.2 °C 3.8 °C, 2018 -5.6 °C, 2010
Maximum Dew Point 0.9 °C 08:05 6.7 °C 8.0 °C, 2019 0.8 °C, 2021
Mean Dew Point -1.3 °C 4.1 °C 5.6 °C, 2024 -2.1 °C, 2010
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 3.4 °C 03:55 5.9 °C 6.1 °C, 2017 -2.6 °C, 2010
Day Maximum (09-21) 9.1 °C 15:09 11.2 °C 15.3 °C, 2013 4.4 °C, 2023
Max 10m Temp Rise 0.5 °C 09:37 0.4 °C 1.1 °C, 2014 0.1 °C, 2020
Max 1hr Temp Rise 1.4 °C 08:25 1.4 °C 4.3 °C, 2014 0.2 °C, 2020
Max 1hr Hum Rise 6% 17:31 7% 11%, 2019 2%, 2020
Max 10m Temp Fall 0.3 °C 21:52 0.6 °C 0.8 °C, 2017 0.2 °C, 2010
Max 1hr Temp Fall 1.1 °C 22:22 2.3 °C 2.1 °C, 2018 0.3 °C, 2020
Max 1hr Hum Fall 10% 10:12 12% 15%, 2017 2%, 2020
Max 10m Wind Speed 12.9 mph 11:50 9.2 mph 15.0 mph, 2017 5.1 mph, 2024
Minimum Feels-like -2.3 °C 00:23 1.8 °C 3.6 °C, 2024 -5.6 °C, 2010
Maximum Feels-like 7.9 °C 15:07 11.1 °C 15.3 °C, 2013 3.5 °C, 2016
Mean Feels-like 2.3 °C 6.2 °C 8.0 °C, 2013 -0.6 °C, 2016
Air-frost Hrs 0 hrs 0 hrs 9 hrs, 2010 0 hrs, 2011
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 5.7 °C (-0.7) 6.4 °C (+0.1) 13.4 °C (+7.0), 2013 1.1 °C (-5.3), 2020
Humidity Range 38% 33% 46%, 2014 4%, 2020
Pressure Range 4 hPa 6 hPa 19 hPa, 2009 3 hPa, 2011
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 6 [60%]20 hrs (117%) [40%] 9.5 [95%], 2013 0 [0%], 2020
Wet Hours 014 hrs (167%) [12%] 12, 2020 , 2009
Cloud Cover am: Partly Cloudy
pm: Partly Cloudy transitioned to Mostly Cloudy
Events None
Comments -
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 5th March 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.
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Daily Graph of Conditions

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Webcam Summary of Cloud Conditions

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Wind rose