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Daily Report for 20th July 2019

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MeasureValue (anomaly)TimeMonth cumul.Record HighRecord Low
Minimum Temperature16.1 °C (+1.5)06:0414.2 °C (+0.3)18.7 °C (+4.1), 20149.6 °C (-5.0), 2026
Maximum Temperature24.2 °C (+0.9)15:0723.5 °C (+0.6)31.7 °C (+8.4), 202118.6 °C (-4.7), 2012
Mean Temperature19.6 °C (+1.2)18.9 °C (+0.4)24.3 °C, 201614.9 °C, 2012
Minimum Humidity51%15:4049%73%, 202431%, 2016
Maximum Humidity95%07:3685%95%, 201956%, 2010
Mean Humidity77%68%81%, 202443%, 2010
Minimum Pressure1006 hPa07:471017 hPa1027 hPa, 20261001 hPa, 2025
Maximum Pressure1016 hPa23:551021 hPa1029 hPa, 20261005 hPa, 2025
Mean Pressure1010 hPa1019 hPa1028 hPa, 20261002 hPa, 2025
Mean Wind Speed6.6 mph (+2.3)3.6 mph (-0.7)8.3 mph, 20161.9 mph, 2021
Maximum Wind Speed18.0 mph13:4510.9 mph20.8 mph, 20167.8 mph, 2014
Maximum Gust27.6 mph12:5117.5 mph30.6 mph, 201610.7 mph, 2011
Mean Wind Directionn/aSSWN, 2012N, 2020
Rainfall9.2 mm23.9 mm (81%)9.2 mm, 20190.0 mm, 2009
Maximum Hourly Rain4.0 mm01:260.7 mm4.8 mm, 20210.2 mm, 2022
Maximum 10-min Rain1.5 mm00:510.2 mm3.0 mm, 20110.2 mm, 2015
Maximum Rain Rate13 mm/h00:452.2 mm/h20 mm/h, 20116 mm/h, 2012
Minimum Dew Point12.9 °C20:4210.0 °C15.6 °C, 20241.0 °C, 2015
Maximum Dew Point17.8 °C10:5214.8 °C20.5 °C, 202110.2 °C, 2020
Mean Dew Point15.1 °C12.5 °C17.8 °C, 20218.6 °C, 2020
MeasureValueTimeMonth cumul.Record HighRecord Low
Night Minimum (21-09)16.1 °C06:0714.2 °C20.9 °C, 20169.6 °C, 2026
Day Maximum (09-21)24.2 °C15:1523.5 °C31.7 °C, 202118.6 °C, 2012
Max 10m Temp Rise0.7 °C10:500.6 °C0.9 °C, 20130.4 °C, 2009
Max 1hr Temp Rise2.5 °C11:002.1 °C3.0 °C, 20161.3 °C, 2011
Max 1hr Hum Rise6%16:569%23%, 20216%, 2009
Max 10m Temp Fall0.8 °C12:030.5 °C1.2 °C, 20210.3 °C, 2013
Max 1hr Temp Fall1.5 °C19:061.7 °C4.8 °C, 20211.1 °C, 2013
Max 1hr Hum Fall14%11:0710%17%, 20177%, 2010
Max 10m Wind Speed12.6 mph13:387.8 mph16.7 mph, 20163.7 mph, 2009
Minimum Feels-like20.1 °C23:5616.1 °C23.5 °C, 20148.8 °C, 2026
Maximum Feels-like28.2 °C15:0726.6 °C38.6 °C, 202120.5 °C, 2011
Mean Feels-like23.7 °C21.5 °C29.3 °C, 202116.7 °C, 2012
Air-frost Hrs0 hrs0 hrs0 hrs, 20090 hrs, 2009
Minimum PM2.5n/a0.0 µg/m32.7 µg/m3, 20260.0 µg/m3, 2009
Maximum PM2.5n/a0.0 µg/m37.6 µg/m3, 20267.6 µg/m3, 2026
Mean PM2.5n/a0.0 µg/m34.6 µg/m3, 20264.6 µg/m3, 2026
MeasureValue (anomaly)Month cumul.Record HighRecord Low
Temperature Range8.1 °C (-0.6)9.2 °C17.1 °C, 20265.1 °C, 2017
Humidity Range44%36%53%, 202117%, 2024
Pressure Range10 hPa5 hPa11 hPa, 20102 hPa, 2011
ObservationDetail
Sun Hours6.5 hrs [45%]
Wet Hours4 hrs
Cloud Coveram: Overcast transitioned to Partly Cloudy
pm: Partly Cloudy
EventsThunder
Commentso.night Thunder Shs/Rn
Observer Absent?Yes - observations may be unreliable
Pond Temperature22.0 °C
Notes
Detailed daily weather report for Hampstead, NW3, London on 20th July 2019. 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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