Daily Report for 27th September 2026

Bad date specified. Defaulted to most recent report available.

Measure	Value (anomaly)	Time	Month cumul.	Record High	Record Low
Minimum Temperature	11.1 °C (+0.6)	03:54	13.2 °C (+1.5)	13.7 °C (+3.2), 2023	5.8 °C (-4.7), 2024
Maximum Temperature	21.8 °C (+4.5)	14:12	22.2 °C (+2.9)	23.6 °C (+6.3), 2018	12.4 °C (-4.9), 2024
Mean Temperature	16.8 °C (+2.5)		17.7 °C (+2.2)	17.8 °C, 2023	10.4 °C, 2022
Minimum Humidity	61%	14:27	53%	80%, 2010	29%, 2018
Maximum Humidity	89%	08:06	87%	98%, 2010	81%, 2020
Mean Humidity	77%		72%	91%, 2010	62%, 2018
Minimum Pressure	1013 hPa	16:37	1018 hPa	1031 hPa, 2015	991 hPa, 2024
Maximum Pressure	1023 hPa	00:07	1023 hPa	1036 hPa, 2015	1005 hPa, 2022
Mean Pressure	1017 hPa		1021 hPa	1033 hPa, 2015	1002 hPa, 2024
Mean Wind Speed	4.4 mph (+0.5)		4.3 mph (+0.4)	7.1 mph, 2019	0.8 mph, 2014
Maximum Wind Speed	15.1 mph	14:22	12.5 mph	20.8 mph, 2016	4.9 mph, 2014
Maximum Gust	25.3 mph	14:07	20.6 mph	33.9 mph, 2016	7.8 mph, 2014
Mean Wind Direction	n/a		W	N, 2020	N, 2009
Rainfall	0.0 mm		26.2 mm (58%)	13.9 mm, 2017	0.0 mm, 2009
Maximum Hourly Rain	n/a		0.4 mm	7.7 mm, 2024	1.1 mm, 2012
Maximum 10-min Rain	n/a		0.2 mm	3.5 mm, 2019	0.5 mm, 2012
Maximum Rain Rate	n/a		1.4 mm/h	92 mm/h, 2019	3.0 mm/h, 2012
Minimum Dew Point	7.4 °C	00:08	9.4 °C	12.7 °C, 2023	3.8 °C, 2024
Maximum Dew Point	15.7 °C	20:20	14.9 °C	16.8 °C, 2023	8.9 °C, 2020
Mean Dew Point	12.6 °C		12.3 °C	14.9 °C, 2023	7.5 °C, 2020
Measure	Value	Time	Month cumul.	Record High	Record Low
Night Minimum (21-09)	11.1 °C	03:48	13.8 °C	16.1 °C, 2021	8.2 °C, 2022
Day Maximum (09-21)	21.8 °C	14:13	22.2 °C	23.6 °C, 2018	12.4 °C, 2024
Max 10m Temp Rise	0.8 °C	08:17	0.7 °C	0.9 °C, 2025	0.3 °C, 2011
Max 1hr Temp Rise	3.3 °C	08:54	2.5 °C	3.4 °C, 2025	1.2 °C, 2024
Max 1hr Hum Rise	9%	18:08	8%	17%, 2012	2%, 2020
Max 10m Temp Fall	0.4 °C	18:02	0.6 °C	1.2 °C, 2021	0.1 °C, 2010
Max 1hr Temp Fall	1.3 °C	22:08	1.9 °C	3.1 °C, 2018	0.4 °C, 2010
Max 1hr Hum Fall	7%	08:59	11%	19%, 2018	4%, 2020
Max 10m Wind Speed	10.9 mph	14:28	9.1 mph	14.5 mph, 2016	3.7 mph, 2014
Minimum Feels-like	11.5 °C	03:33	14.7 °C	16.4 °C, 2023	3.4 °C, 2024
Maximum Feels-like	25.7 °C	12:52	25.4 °C	26.2 °C, 2023	13.9 °C, 2022
Mean Feels-like	19.5 °C		20.3 °C	21.7 °C, 2023	10.0 °C, 2022
Air-frost Hrs	0 hrs		0 hrs	0 hrs, 2009	0 hrs, 2009
Minimum PM2.5	1.6 µg/m³	23:58	1.4 µg/m³	1.6 µg/m³, 2026	0.0 µg/m³, 2009
Maximum PM2.5	15.4 µg/m³	05:12	14.6 µg/m³	15.4 µg/m³, 2026	15.4 µg/m³, 2026
Mean PM2.5	9.9 µg/m³		4.9 µg/m³	9.9 µg/m³, 2026	9.9 µg/m³, 2026
Measure	Value (anomaly)		Month cumul.	Record High	Record Low
Temperature Range	10.7 °C (+3.9)		9.0 °C	13.3 °C, 2018	3.1 °C, 2020
Humidity Range	28%		34%	61%, 2018	7%, 2020
Pressure Range	10 hPa		5 hPa	27 hPa, 2024	2 hPa, 2009

Observation	Detail
Sun Hours	3.3 hrs [31%]
Wet Hours	0 hrs
Cloud Cover	unknown
Events	None
Comments	blr
Observer Absent?	Yes - observations may be unreliable
Pond Temperature	17.0 °C

Notes: Detailed daily weather report for Hampstead, NW3, London on 27th 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

Wind direction

Air pollution

Wind rose

Webcam Summary of Cloud Conditions

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