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Daily Report for 31st July 2012

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MeasureValue (anomaly)TimeMonth cumul.Record HighRecord Low
Minimum Temperature11.4 °C (-3.2)05:4313.3 °C (-0.9)19.3 °C (+4.7), 20228.5 °C (-6.1), 2015
Maximum Temperature20.0 °C (-3.3)17:3421.1 °C (-2.0)36.2 °C (+12.9), 202018.8 °C (-4.5), 2023
Mean Temperature16.1 °C (-3.2)17.1 °C (-1.5)25.6 °C, 202015.9 °C, 2015
Minimum Humidity54%00:0352%76%, 202327%, 2026
Maximum Humidity90%09:1588%96%, 202373%, 2016
Mean Humidity79%72%88%, 202352%, 2026
Minimum Pressure1012 hPa16:431011 hPa1018 hPa, 20261002 hPa, 2023
Maximum Pressure1017 hPa01:441016 hPa1023 hPa, 20091011 hPa, 2023
Mean Pressure1014 hPa1013 hPa1019 hPa, 20091006 hPa, 2023
Mean Wind Speed4.1 mph (-0.2)4.6 mph (+0.3)7.3 mph, 20192.0 mph, 2024
Maximum Wind Speed13.7 mph16:3312.0 mph16.6 mph, 20238.4 mph, 2026
Maximum Gust19.7 mph15:2716.7 mph28.8 mph, 202312.3 mph, 2015
Mean Wind Directionn/aSSWNW, 2016NNE, 2026
Rainfall3.2 mm89.0 mm (193%)6.0 mm, 20230.0 mm, 2009
Maximum Hourly Rain0.9 mm02:401.1 mm4.2 mm, 20180.6 mm, 2013
Maximum 10-min Rain0.3 mm02:400.6 mm2.0 mm, 20180.3 mm, 2012
Maximum Rain Rate1.2 mm/h02:408 mm/h53 mm/h, 20181.1 mm/h, 2013
Minimum Dew Point6.1 °C00:048.7 °C16.0 °C, 20224.4 °C, 2015
Maximum Dew Point16.5 °C16:1413.9 °C19.0 °C, 202210.7 °C, 2009
Mean Dew Point12.3 °C11.4 °C17.5 °C, 20226.8 °C, 2015
MeasureValueTimeMonth cumul.Record HighRecord Low
Night Minimum (21-09)11.4 °C05:4413.4 °C19.7 °C, 20228.5 °C, 2015
Day Maximum (09-21)20.0 °C17:3521.0 °C36.2 °C, 202018.8 °C, 2023
Max 10m Temp Rise0.5 °C10:400.7 °C0.8 °C, 20090.4 °C, 2013
Max 1hr Temp Rise1.9 °C11:202.4 °C3.8 °C, 20151.1 °C, 2023
Max 1hr Hum Rise11%01:4310%30%, 20264%, 2016
Max 10m Temp Fall0.4 °C04:060.6 °C0.9 °C, 20200.3 °C, 2010
Max 1hr Temp Fall1.4 °C04:391.8 °C3.6 °C, 20201.1 °C, 2013
Max 1hr Hum Fall8%17:0712%17%, 20266%, 2022
Max 10m Wind Speed8.6 mph17:239.7 mph13.1 mph, 20223.7 mph, 2009
Minimum Feels-like12.1 °C05:3615.0 °C23.9 °C, 20228.5 °C, 2015
Maximum Feels-like24.7 °C16:3623.5 °C41.3 °C, 202021.7 °C, 2015
Mean Feels-like18.6 °C19.2 °C29.7 °C, 202016.1 °C, 2015
Air-frost Hrs0 hrs0 hrs0 hrs, 20090 hrs, 2009
Minimum PM2.5n/a0.0 µg/m31.3 µg/m3, 20260.0 µg/m3, 2009
Maximum PM2.5n/a0.0 µg/m37.4 µg/m3, 20267.4 µg/m3, 2026
Mean PM2.5n/a0.0 µg/m33.1 µg/m3, 20263.1 µg/m3, 2026
MeasureValue (anomaly)Month cumul.Record HighRecord Low
Temperature Range8.6 °C (-0.1)7.7 °C19.6 °C, 20203.0 °C, 2023
Humidity Range36%36%54%, 202020%, 2023
Pressure Range5 hPa6 hPa8 hPa, 20232 hPa, 2010
ObservationDetail
Sun Hours0.1 hrs [1%]
Wet Hours7 hrs
Cloud Coveram: Overcast
pm: Overcast with periods of Mostly Cloudy
EventsNone
Comments01-08 L Rn; 13 Dz; 15 L Sh
Observer Absent?No
Pond Temperature0.0 °C
Notes
Detailed daily weather report for Hampstead, NW3, London on 31st July 2012. Times of extremes use the midpoint of the longest continuous period at that value. Cumulative anomalies are relative to the expected value for the month-to-date. Sun and wet hours are derived from webcam/rainfall analysis and may be adjusted. Data should be viewed with appropriate caution.

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