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Daily Report for 19th July 2011

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MeasureValue (anomaly)TimeMonth cumul.Record HighRecord Low
Minimum Temperature11.9 °C (-2.6)05:4012.9 °C (-1.0)21.1 °C (+6.6), 202211.7 °C (-2.8), 2026
Maximum Temperature19.9 °C (-3.4)14:1221.0 °C (-1.9)39.1 °C (+15.8), 202218.6 °C (-4.7), 2019
Mean Temperature15.3 °C (-3.0)17.0 °C (-1.4)30.1 °C, 202215.3 °C, 2011
Minimum Humidity62%14:2049%68%, 201720%, 2022
Maximum Humidity94%05:4583%94%, 201166%, 2010
Mean Humidity84%66%84%, 201144%, 2022
Minimum Pressure1000 hPa02:201009 hPa1024 hPa, 20261000 hPa, 2011
Maximum Pressure1008 hPa23:251014 hPa1028 hPa, 20261008 hPa, 2011
Mean Pressure1004 hPa1012 hPa1026 hPa, 20261004 hPa, 2011
Mean Wind Speed3.3 mph (-1.0)4.9 mph (+0.6)6.1 mph, 20091.1 mph, 2021
Maximum Wind Speed8.5 mph12.4 mph19.0 mph, 20227.3 mph, 2025
Maximum Gust12.5 mph00:2117.6 mph27.4 mph, 202211.5 mph, 2025
Mean Wind Directionn/aSN, 2020NE, 2026
Rainfall3.0 mm41.2 mm (146%)35.8 mm, 20250.0 mm, 2010
Maximum Hourly Rain1.4 mm17:081.1 mm5.4 mm, 20250.4 mm, 2015
Maximum 10-min Rain1.1 mm17:080.7 mm1.5 mm, 20140.2 mm, 2015
Maximum Rain Rate20 mm/h17:0214 mm/h24 mm/h, 20140.8 mm/h, 2015
Minimum Dew Point10.8 °C04:577.6 °C14.8 °C, 2021-0.3 °C, 2015
Maximum Dew Point14.9 °C17:5312.5 °C21.5 °C, 20219.8 °C, 2026
Mean Dew Point12.6 °C10.0 °C18.3 °C, 20217.1 °C, 2015
MeasureValueTimeMonth cumul.Record HighRecord Low
Night Minimum (21-09)11.9 °C05:4013.0 °C21.1 °C, 202211.7 °C, 2026
Day Maximum (09-21)19.9 °C14:1021.0 °C39.1 °C, 202218.6 °C, 2019
Max 10m Temp Rise0.6 °C09:480.6 °C0.9 °C, 20120.4 °C, 2019
Max 1hr Temp Rise2.3 °C12:122.4 °C4.3 °C, 20221.6 °C, 2019
Max 1hr Hum Rise9%15:1410%27%, 20224%, 2010
Max 10m Temp Fall0.5 °C14:330.5 °C1.4 °C, 20220.4 °C, 2013
Max 1hr Temp Fall1.9 °C15:051.8 °C5.5 °C, 20221.3 °C, 2025
Max 1hr Hum Fall9%10:4110%21%, 20186%, 2017
Max 10m Wind Speed6.9 mph14:338.7 mph13.6 mph, 20225.2 mph, 2020
Minimum Feels-like13.6 °C04:5013.9 °C24.3 °C, 202212.3 °C, 2026
Maximum Feels-like22.8 °C12:5822.6 °C42.6 °C, 202221.9 °C, 2012
Mean Feels-like17.9 °C18.4 °C34.1 °C, 202217.9 °C, 2011
Air-frost Hrs0 hrs0 hrs0 hrs, 20090 hrs, 2009
Minimum PM2.5n/a0.0 µg/m32.2 µg/m3, 20260.0 µg/m3, 2009
Maximum PM2.5n/a0.0 µg/m39.4 µg/m3, 20269.4 µg/m3, 2026
Mean PM2.5n/a0.0 µg/m34.3 µg/m3, 20264.3 µg/m3, 2026
MeasureValue (anomaly)Month cumul.Record HighRecord Low
Temperature Range8.0 °C (-0.7)8.1 °C18.0 °C, 20224.2 °C, 2025
Humidity Range32%34%54%, 201517%, 2017
Pressure Range8 hPa5 hPa9 hPa, 20162 hPa, 2023
ObservationDetail
Sun Hours3 hrs [21%]
Wet Hours2 hrs
Cloud Coveram: Overcast transitioned to Mostly Cloudy
pm: Mostly Cloudy
EventsNone
Comments13 L? 1430 H? 16 L? 17 H? 18?1930-20 L Shs
Observer Absent?No
Pond Temperature0.0 °C
Notes
Detailed daily weather report for Hampstead, NW3, London on 19th July 2011. 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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