Daily Report for 11th July 2020

Measure	Value (anomaly)	Time	Month cumul.	Record High	Record Low
Minimum Temperature	9.8 °C (-4.3)	05:37	12.7 °C (-1.0)	17.5 °C (+3.4), 2010	9.8 °C (-4.3), 2020
Maximum Temperature	20.6 °C (-2.5)	17:59	20.3 °C (-2.5)	31.8 °C (+8.7), 2025	19.4 °C (-3.7), 2012
Mean Temperature	15.4 °C (-3.4)		16.5 °C (-1.7)	25.4 °C, 2025	15.2 °C, 2012
Minimum Humidity	45%	17:59	60%	82%, 2014	33%, 2015
Maximum Humidity	85%	05:44	90%	95%, 2009	65%, 2015
Mean Humidity	67%		77%	90%, 2014	48%, 2015
Minimum Pressure	1024 hPa	00:02	1013 hPa	1024 hPa, 2020	1005 hPa, 2016
Maximum Pressure	1029 hPa	22:13	1019 hPa	1029 hPa, 2020	1011 hPa, 2012
Mean Pressure	1027 hPa		1016 hPa	1027 hPa, 2020	1008 hPa, 2016
Mean Wind Speed	3.1 mph (-1.2)		6.3 mph (+2.0)	11.2 mph, 2016	2.1 mph, 2025
Maximum Wind Speed	11.5 mph	14:12	15.6 mph	23.7 mph, 2016	7.8 mph, 2014
Maximum Gust	15.0 mph	11:07	24.3 mph	38.7 mph, 2016	12.3 mph, 2011
Mean Wind Direction	n/a		W	NNW, 2014	N, 2011
Rainfall	0.0 mm		25.7 mm (157%)	29.7 mm, 2017	0.0 mm, 2010
Maximum Hourly Rain	n/a		0.8 mm	6.6 mm, 2017	0.2 mm, 2024
Maximum 10-min Rain	n/a		0.4 mm	4.8 mm, 2017	0.2 mm, 2024
Maximum Rain Rate	n/a		7 mm/h	54 mm/h, 2016	0.3 mm/h, 2023
Minimum Dew Point	7.3 °C	05:30	9.7 °C	14.3 °C, 2023	6.0 °C, 2013
Maximum Dew Point	11.0 °C	10:07	14.3 °C	17.9 °C, 2026	9.3 °C, 2013
Mean Dew Point	8.9 °C		12.1 °C	15.3 °C, 2026	7.7 °C, 2013
Measure	Value	Time	Month cumul.	Record High	Record Low
Night Minimum (21-09)	9.8 °C	05:37	13.1 °C	17.5 °C, 2010	9.8 °C, 2020
Day Maximum (09-21)	20.6 °C	18:00	20.3 °C	31.8 °C, 2025	19.4 °C, 2012
Max 10m Temp Rise	0.6 °C	14:41	0.6 °C	0.9 °C, 2013	0.3 °C, 2014
Max 1hr Temp Rise	2.7 °C	07:57	2.0 °C	4.0 °C, 2025	1.0 °C, 2014
Max 1hr Hum Rise	12%	21:18	11%	18%, 2012	4%, 2014
Max 10m Temp Fall	0.7 °C	15:01	0.7 °C	0.9 °C, 2009	0.3 °C, 2014
Max 1hr Temp Fall	3.0 °C	21:39	2.2 °C	3.0 °C, 2012	1.2 °C, 2009
Max 1hr Hum Fall	9%	08:38	10%	15%, 2012	4%, 2014
Max 10m Wind Speed	6.8 mph	14:19	11.5 mph	18.0 mph, 2016	5.2 mph, 2014
Minimum Feels-like	8.3 °C	05:39	13.9 °C	21.1 °C, 2026	8.3 °C, 2020
Maximum Feels-like	21.4 °C	18:00	23.0 °C	36.1 °C, 2025	20.8 °C, 2012
Mean Feels-like	16.2 °C		18.9 °C	29.4 °C, 2025	16.2 °C, 2020
Air-frost Hrs	0 hrs		0 hrs	0 hrs, 2009	0 hrs, 2009
Minimum PM2.5	n/a		0.0 µg/m³	8.3 µg/m³, 2026	0.0 µg/m³, 2009
Maximum PM2.5	n/a		0.0 µg/m³	22.1 µg/m³, 2026	22.1 µg/m³, 2026
Mean PM2.5	n/a		0.0 µg/m³	13.2 µg/m³, 2026	13.2 µg/m³, 2026
Measure	Value (anomaly)		Month cumul.	Record High	Record Low
Temperature Range	10.8 °C (+1.8)		7.5 °C	15.6 °C, 2025	5.0 °C, 2017
Humidity Range	40%		30%	52%, 2011	12%, 2014
Pressure Range	5 hPa		6 hPa	6 hPa, 2023	1 hPa, 2010

Observation	Detail
Sun Hours	10 hrs [67%]
Wet Hours	0 hrs
Cloud Cover	am: Sunny transitioned to Mostly Sunny pm: Partly Cloudy transitioned to Mostly Sunny
Events	None
Comments	-
Observer Absent?	Yes - observations may be unreliable
Pond Temperature	5.0 °C

Notes: Detailed daily weather report for Hampstead, NW3, London on 11th July 2020. 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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Daily Graph of Conditions

Wind direction

Air pollution

Wind rose

Webcam Summary of Cloud Conditions

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