Daily Report for 21st March 2026

Measure	Value (anomaly)	Time	Month cumul.	Record High	Record Low
Minimum Temperature	2.3 °C (-2.4)	05:33	5.6 °C (+1.6)	9.3 °C (+4.6), 2019	-0.7 °C (-5.4), 2018
Maximum Temperature	13.1 °C (+1.7)	14:48	13.2 °C (+2.7)	16.7 °C (+5.3), 2025	6.3 °C (-5.1), 2013
Mean Temperature	7.5 °C (-0.4)		9.2 °C (+2.2)	12.9 °C, 2025	3.5 °C, 2013
Minimum Humidity	31%	13:22	61%	76%, 2023	31%, 2026
Maximum Humidity	93%	08:30	91%	97%, 2010	77%, 2012
Mean Humidity	71%		79%	86%, 2023	58%, 2017
Minimum Pressure	1018 hPa	17:34	1014 hPa	1033 hPa, 2011	999 hPa, 2014
Maximum Pressure	1022 hPa	10:02	1022 hPa	1036 hPa, 2011	1008 hPa, 2014
Mean Pressure	1020 hPa		1018 hPa	1034 hPa, 2011	1005 hPa, 2014
Mean Wind Speed	2.7 mph (-2.5)		5.3 mph (+0.1)	9.0 mph, 2020	2.0 mph, 2022
Maximum Wind Speed	8.8 mph	12:23	14.0 mph	21.5 mph, 2014	7.5 mph, 2022
Maximum Gust	12.7 mph	13:37	21.2 mph	34.6 mph, 2020	10.7 mph, 2011
Mean Wind Direction	n/a		S	NW, 2016	NNE, 2015
Rainfall	0.0 mm		25.6 mm (97%)	2.4 mm, 2014	0.0 mm, 2009
Maximum Hourly Rain	n/a		0.7 mm	2.4 mm, 2014	0.3 mm, 2023
Maximum 10-min Rain	n/a		0.3 mm	1.5 mm, 2014	0.3 mm, 2023
Maximum Rain Rate	n/a		2.6 mm/h	18 mm/h, 2014	18 mm/h, 2014
Minimum Dew Point	-4.3 °C	13:22	2.8 °C	7.5 °C, 2023	-6.5 °C, 2020
Maximum Dew Point	4.3 °C	20:48	8.1 °C	11.8 °C, 2024	0.6 °C, 2013
Mean Dew Point	1.8 °C		5.4 °C	9.2 °C, 2024	-1.0 °C, 2013
Measure	Value	Time	Month cumul.	Record High	Record Low
Night Minimum (21-09)	2.3 °C	05:34	5.9 °C	9.3 °C, 2019	-0.7 °C, 2018
Day Maximum (09-21)	13.1 °C	14:49	13.0 °C	16.7 °C, 2025	6.3 °C, 2013
Max 10m Temp Rise	0.7 °C	10:15	0.6 °C	0.8 °C, 2014	0.4 °C, 2013
Max 1hr Temp Rise	2.7 °C	10:41	1.9 °C	3.2 °C, 2022	0.9 °C, 2015
Max 1hr Hum Rise	17%	19:33	7%	17%, 2020	3%, 2019
Max 10m Temp Fall	0.5 °C	18:45	0.5 °C	0.8 °C, 2014	0.2 °C, 2013
Max 1hr Temp Fall	2.1 °C	18:56	1.5 °C	2.3 °C, 2016	0.8 °C, 2013
Max 1hr Hum Fall	21%	10:53	9%	23%, 2020	6%, 2019
Max 10m Wind Speed	6.2 mph	12:12	10.3 mph	15.8 mph, 2020	5.6 mph, 2011
Minimum Feels-like	-0.5 °C	05:50	2.3 °C	6.8 °C, 2019	-3.6 °C, 2018
Maximum Feels-like	13.1 °C	14:45	13.5 °C	18.4 °C, 2024	5.0 °C, 2013
Mean Feels-like	6.8 °C		8.2 °C	12.9 °C, 2024	0.7 °C, 2013
Air-frost Hrs	0 hrs		0 hrs	5 hrs, 2018	0 hrs, 2009
Minimum PM2.5	n/a		0.0 µg/m³	0.0 µg/m³, 2009	0.0 µg/m³, 2009
Maximum PM2.5	n/a		0.0 µg/m³	n/a	n/a
Mean PM2.5	n/a		0.0 µg/m³	n/a	n/a
Measure	Value (anomaly)		Month cumul.	Record High	Record Low
Temperature Range	10.8 °C (+4.1)		7.6 °C	16.0 °C, 2022	4.0 °C, 2015
Humidity Range	62%		30%	62%, 2026	16%, 2019
Pressure Range	4 hPa		7 hPa	14 hPa, 2025	2 hPa, 2022

Observation	Detail
Sun Hours	10.1 hrs [92%]
Wet Hours	0 hrs
Cloud Cover	unknown
Events	None
Comments	"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""patchy am fog"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
Observer Absent?	Yes - observations may be unreliable
Pond Temperature	8.4 °C

Notes: Detailed daily weather report for Hampstead, NW3, London on 21st March 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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