Daily Report for 14th September 2026

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Measure	Value (anomaly)	Time	Month cumul.	Record High	Record Low
Minimum Temperature	17.7 °C (+6.0)	06:16	14.5 °C (+2.2)	19.0 °C (+7.3), 2016	5.4 °C (-6.3), 2024
Maximum Temperature	24.9 °C (+5.7)	16:05	22.6 °C (+2.2)	27.3 °C (+8.1), 2020	13.6 °C (-5.6), 2013
Mean Temperature	20.6 °C (+5.8)		18.4 °C (+2.2)	23.1 °C, 2016	11.1 °C, 2013
Minimum Humidity	69%	16:13	55%	86%, 2021	36%, 2019
Maximum Humidity	91%	07:00	87%	98%, 2013	80%, 2016
Mean Humidity	83%		73%	93%, 2021	64%, 2011
Minimum Pressure	1020 hPa	23:55	1017 hPa	1030 hPa, 2024	991 hPa, 2015
Maximum Pressure	1024 hPa	10:08	1022 hPa	1037 hPa, 2019	1000 hPa, 2015
Mean Pressure	1023 hPa		1020 hPa	1033 hPa, 2019	994 hPa, 2015
Mean Wind Speed	5.0 mph (+1.1)		5.0 mph (+1.1)	7.7 mph, 2010	1.2 mph, 2021
Maximum Wind Speed	12.2 mph	19:12	13.5 mph	19.4 mph, 2015	6.6 mph, 2022
Maximum Gust	18.4 mph	15:50	22.8 mph	26.5 mph, 2025	10.3 mph, 2019
Mean Wind Direction	n/a		W	N, 2013	N, 2009
Rainfall	0.0 mm		25.2 mm (108%)	17.5 mm, 2021	0.0 mm, 2009
Maximum Hourly Rain	n/a		0.7 mm	6.7 mm, 2021	0.2 mm, 2022
Maximum 10-min Rain	n/a		0.3 mm	1.9 mm, 2021	0.2 mm, 2022
Maximum Rain Rate	n/a		2.7 mm/h	30 mm/h, 2015	1.0 mm/h, 2013
Minimum Dew Point	16.1 °C	05:29	11.0 °C	16.1 °C, 2026	4.0 °C, 2024
Maximum Dew Point	19.2 °C	15:01	15.5 °C	19.2 °C, 2026	9.8 °C, 2011
Mean Dew Point	17.5 °C		13.2 °C	17.5 °C, 2026	7.3 °C, 2011
Measure	Value	Time	Month cumul.	Record High	Record Low
Night Minimum (21-09)	17.7 °C	06:10	14.9 °C	19.0 °C, 2016	5.4 °C, 2024
Day Maximum (09-21)	24.9 °C	16:17	22.4 °C	27.3 °C, 2020	13.6 °C, 2013
Max 10m Temp Rise	0.5 °C	13:03	0.6 °C	0.9 °C, 2022	0.2 °C, 2010
Max 1hr Temp Rise	1.9 °C	13:06	2.2 °C	4.2 °C, 2024	0.6 °C, 2021
Max 1hr Hum Rise	5%	19:15	8%	15%, 2016	2%, 2021
Max 10m Temp Fall	0.4 °C	18:54	0.6 °C	1.0 °C, 2016	0.3 °C, 2018
Max 1hr Temp Fall	1.7 °C	19:31	1.8 °C	3.8 °C, 2019	0.9 °C, 2018
Max 1hr Hum Fall	6%	13:06	10%	19%, 2012	2%, 2010
Max 10m Wind Speed	9.0 mph	21:10	10.0 mph	14.0 mph, 2015	4.4 mph, 2022
Minimum Feels-like	22.4 °C	05:55	16.6 °C	24.1 °C, 2016	4.8 °C, 2017
Maximum Feels-like	31.7 °C	15:55	26.1 °C	33.1 °C, 2016	16.1 °C, 2013
Mean Feels-like	26.2 °C		21.4 °C	27.7 °C, 2016	11.5 °C, 2017
Air-frost Hrs	0 hrs		0 hrs	0 hrs, 2009	0 hrs, 2009
Minimum PM2.5	0.2 µg/m³	01:15	1.2 µg/m³	0.2 µg/m³, 2026	0.0 µg/m³, 2009
Maximum PM2.5	9.7 µg/m³	03:25	14.5 µg/m³	9.7 µg/m³, 2026	9.7 µg/m³, 2026
Mean PM2.5	5.8 µg/m³		3.9 µg/m³	5.8 µg/m³, 2026	5.8 µg/m³, 2026
Measure	Value (anomaly)		Month cumul.	Record High	Record Low
Temperature Range	7.2 °C (-0.3)		8.0 °C	16.6 °C, 2020	3.5 °C, 2021
Humidity Range	22%		32%	58%, 2019	10%, 2021
Pressure Range	4 hPa		5 hPa	13 hPa, 2017	3 hPa, 2018

Observation	Detail
Sun Hours	n/a
Wet Hours	n/a
Cloud Cover	not available
Events	None
Comments	None known
Observer Absent?	No
Pond Temperature	n/a

Notes: Detailed daily weather report for Hampstead, NW3, London on 14th September 2026. 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

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Wind rose

Webcam Summary of Cloud Conditions

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