Daily Report for 2nd April 2015

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 5.7 °C (+0.3) 07:03 5.0 °C (-0.5) 11.1 °C (+5.7), 2011 -1.0 °C (-6.4), 2013
Maximum Temperature 11.4 °C (-1.6) 17:10 11.1 °C (-1.9) 18.6 °C (+5.6), 2014 7.3 °C (-5.7), 2013
Mean Temperature 8.6 °C (-0.6) 8.1 °C (-1.2) 15.1 °C, 2011 3.2 °C, 2013
Minimum Humidity 40% 18:28 42% 83%, 2018 34%, 2013
Maximum Humidity 95% 05:28 91% 96%, 2018 80%, 2020
Mean Humidity 66% 61% 91%, 2018 55%, 2013
Minimum Pressure 1013 hPa 03:31 1015 hPa 1029 hPa, 2021 995 hPa, 2018
Maximum Pressure 1023 hPa 18:08 1024 hPa 1033 hPa, 2021 1006 hPa, 2024
Mean Pressure 1020 hPa 1021 hPa 1031 hPa, 2021 1000 hPa, 2018
Mean Wind Speed 5.2 mph (+0.3) 7.2 mph (+2.3) 8.3 mph, 2013 2.1 mph, 2012
Maximum Wind Speed 16.1 mph 01:34 16.9 mph 19.2 mph, 2013 7.4 mph, 2017
Maximum Gust 22.5 mph 00:38 25.6 mph 26.3 mph, 2013 10.5 mph, 2017
Mean Wind Direction WNW
Rainfall 2.2 mm 3.9 mm (139%) 13.6 mm, 2018
Maximum Hourly Rain 1.1 mm 04:15 2.4 mm, 2024
Maximum 10-min Rain 0.9 mm 03:54 0.9 mm, 2015
Maximum Rain Rate 42 mm/h 03:50 42 mm/h, 2015
Minimum Dew Point -2.5 °C 18:37 -3.0 °C 7.2 °C, 2024 -9.3 °C, 2013
Maximum Dew Point 8.4 °C 03:47 7.0 °C 11.4 °C, 2011 -1.1 °C, 2013
Mean Dew Point 2.1 °C 0.7 °C 9.0 °C, 2011 -5.8 °C, 2013
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 5.7 °C 07:03 5.0 °C 12.5 °C, 2011 -1.0 °C, 2013
Day Maximum (09-21) 11.4 °C 17:10 11.1 °C 18.6 °C, 2014 7.3 °C, 2013
Max 10m Temp Rise 0.3 °C 12:30 0.4 °C 1.1 °C, 2012 0.3 °C, 2015
Max 1hr Temp Rise 1.1 °C 12:49 1.6 °C 5.4 °C, 2012 1.1 °C, 2015
Max 1hr Hum Rise 13% 22:52 13% 19%, 2022 5%, 2009
Max 10m Temp Fall 1.0 °C 03:58 0.7 °C 1.5 °C, 2022 0.2 °C, 2009
Max 1hr Temp Fall 2.5 °C 04:46 1.8 °C 2.5 °C, 2015 0.8 °C, 2009
Max 1hr Hum Fall 22% 11:01 14% 22%, 2015 5%, 2018
Max 10m Wind Speed 12.0 mph 01:43 12.8 mph 13.6 mph, 2013 5.7 mph, 2017
Minimum Feels-like 1.9 °C 06:33 0.5 °C 11.1 °C, 2011 -6.5 °C, 2013
Maximum Feels-like 11.4 °C 16:45 11.1 °C 20.3 °C, 2011 6.1 °C, 2013
Mean Feels-like 7.1 °C 5.9 °C 16.1 °C, 2011 -0.9 °C, 2013
Air-frost Hrs 0 hrs 0 hrs 6 hrs, 2013 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 5.7 °C (-1.9) 6.2 °C (-1.5) 12.6 °C (+5.0), 2012 4.8 °C (-2.8), 2010
Humidity Range 55% 50% 55%, 2015 13%, 2018
Pressure Range 10 hPa 9 hPa 16 hPa, 2018 4 hPa, 2021
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 5 [43%]10 hrs (100%) [43%] 11 [94%], 2013 0 [0%], 2018
Wet Hours 4
[Mean rain rate: 0.6 mm/h]
6 hrs (196%) [13%] 12, 2018 0, 2009
Cloud Cover am: Overcast
pm: Sunny transitioned to Mostly Cloudy
Events None
Comments o.night, 23- Rain/Showers
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 2nd April 2015.
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

daycamsumLarge resolution version

Wind rose