Portsmouth Historic Weather Records
Analyse hottest, coldest, windiest & wettest days

Portsmouth Weather Trend Graph

Temperature (°C)

Months

Months	Historic Min Temp.	Min Temp.	Forecasted Min Temp.	Historic Max Temp.	Max Temp.	Forecasted Max Temp.
	-2.7937499999999997	-7.2		2.8	-1.1
	-4.89375	-11.3		1.8562500000000002	-3.3
	-5.1	-6.4		0.7500000000000001	-0.8
	-5.300000000000001	-7.4		1.6125	-1.4
	-6.200000000000001	-12.8		0.71875	-6.7
	-6.125	-4.5		0.012500000000000067	-0.5
	-7.3374999999999995	-0.5		-0.94375	4
	-7.431249999999999	-2.8		-0.7812499999999997	4.4
	-6.231249999999999	-6.3		-0.39999999999999997	4.7
	-5.2375	2.6		2.5	6.3
	-4.387499999999999	0.2		2.2812500000000004	4.3
	-2.875	-3.8		4.6000000000000005	1
	-4.581250000000001	-0.9		4.0562499999999995	5.7
	-6.012499999999999	2.4		0.7000000000000001	6.8
Jan.	-6.00625	-6.1		-0.5562500000000001	4.7
	-5.6875	-6		1.2250000000000003	-0.4
	-5.368750000000001	-2		0.46875	3.4
	-6.16875	-2.7		1.61875	2.7
	-4.949999999999999	-3.8		1.7750000000000004	0
	-7.025	-9.1		0.23124999999999996	-3.8
	-8.75	-10.2		-2.9250000000000003	-2.9
	-9.18125	-1.4		-1.86875	5.9
	-7.89375	-6.8		-0.2312499999999999	-1.3
	-7.09375	-16.6		-0.22499999999999998	-10
	-5.793749999999999	-15.5		1.3187499999999999	-8.5
	-5.4624999999999995	-10.6		1.00625	-4.7
	-4.575	-11.4		1.9187499999999997	-5.7
	-5.3187500000000005	-13.6		0.76875	-3.4
	-6.81875	-12		-0.26875000000000004	-4.3
	-7.543750000000001	-16.8		-0.93125	-8.6
	-8.25	-18.2		-0.4624999999999999	-5.2
	-6.762500000000001	-12.4		0.94375	-3.7
	-6.368749999999999	-12.2		1.01875	0.9
	-6.606249999999999	-13.2		0.6062499999999998	-1
	-6.637499999999999	-6.3		1.5875	1
	-7.493750000000001	-9.1		1.5937500000000002	-0.1
	-7.374999999999998	-12		0.58125	-4.3
	-5.924999999999999	-11.7		0.6312500000000001	-1.8
	-6.7749999999999995	-16.6		0.9125	-8.2
	-7.593749999999999	-15		-0.8187500000000001	-1.6
	-5.681250000000002	-12.3		1.725	-0.9
	-6.8374999999999995	-3.5		0.275	0.7
	-7.449999999999999	-6.2		0.94375	2.3
	-6.86875	-8.6		0.11874999999999997	2.9
	-7.3812500000000005	-6.4		-0.0187500000000001	3.4
Feb.	-7.656250000000002	-5.6		1.5875	-0.2
	-4.25625	-3.4		2.9625000000000004	2.9
	-5.45	-0.4		1.6625	3
	-6.781249999999999	-0.3		1.9749999999999996	2.7
	-6.15625	-3.7		2.09375	4.1
	-5.599999999999999	-4.6		1.8312499999999998	1.7
	-5.075	-3.9		2.9875000000000003	0.6
	-3.8374999999999995	-6		3.9375	1.4
	-3.7312499999999993	-6.1		4.45	0.2
	-4.19375	-7.5		4.125	0.2
	-3.2437499999999995	-9.2		3.15	3
	-5.53125	-4		1.8312499999999998	4.3
	-5.175	-7.1		2.425	3.9
	-3.2375000000000003	-2.1		3.275	6.4
	-4.09375	-3.5		4.23125	1.1
	-4.68125	-13.3		2.7000000000000006	-1.6
	-6.25625	-7.3		2.0250000000000004	0.3
	-4.7437499999999995	-1.3		2.0124999999999997	8.6
	-4.36875	-5.2		2.61875	1.2
	-4.237500000000001	0.1		3.20625	0.7
	-4.062500000000001	0.7		3.7500000000000004	5.2
	-2.96875	5.3		4.9125000000000005	13.2
	-2.3312500000000003	4.5		5.574999999999999	13.2
	-1.6375	2.6		6.89375	14.7
	-0.18750000000000006	2.9		7.549999999999999	8.1
	-1.0687499999999999	-2.2		5.95625	13.2
	-2.7312499999999997	-3.1		5.0687500000000005	3.4
	-1.1375	-0.1		5.69375	6
Mar.	-0.8062500000000001	-1.5		5.68125	4.4
	-1.8249999999999997	2.3		5.0125	12.5
	-2.18125	-3.2		5.70625	13.9
	-1.3625000000000003	-4.7		7.325	0.2
	-1.8	-2.4		5.5625	4.2
	-0.9812500000000003	0.3		7.38125	8.3
	-0.33125000000000027	2.7		7.55625	8.6
	-1.2	1.2		6.875	5.3
	-2.1125000000000003	-0.6		6.131249999999999	2.8
	-0.825	-0.9		6.3625	8.8
	-0.6187499999999998	1.6		6.312499999999999	8.6
	-0.7062499999999999	3.9		6.4437500000000005	15.2
	-1.6062500000000002	1.4		6.081250000000001	10.2
	-0.6937500000000001	-3.9		6.675	1
	0.3187500000000001	-3.1		7.49375	5.5
	0.5125000000000001	3.1		7.137500000000001	15.3
	1.3875000000000002	4.9		9.068750000000001	10.5
	0.99375	3.5		9.11875	16.4
	-0.050000000000000044	1.1		7.7250000000000005	2.6
	1.2499999999999998	2.2		9.925	13.1
	1.3	3.2		9.00625	10.7
	0.9000000000000001	3.3		7.768750000000001	10.1
	0.91875	0.7		8.662500000000001	7.9
	1.525	-1.8		10.062499999999998	4.7
	2.025	-2.5		9.33125	8.8
	1.1687499999999997	-2.7		9.875	13.1
	2.3500000000000005	0.6		11.36875	24.5
	3.71875	5.5		12.2	16.1
	4.14375	0.1		11.362499999999999	15.1
	5.112500000000001	5.2		12.681249999999999	23.1
	5.15625	11.8		14.0125	25.9
Apr.	4.2875	8.2		12.524999999999999	16.8
	3.6125000000000007	7.3		11.537500000000001	13.8
	4.49375	7.6		11.875000000000002	17.1
	3.2624999999999997	5.8		11.556249999999999	12.7
	4.4437500000000005	1.6		12.668750000000001	9
	4.806250000000001	0.1		12.725	8.6
	4.6	-1.5		12.925	9.9
	4.48125	-0.1		13.14375	8.3
	4.39375	3.6		12.112499999999999	18.1
	4.7375	-0.3		14.131249999999998	12
	5.168749999999999	-0.2		11.806249999999999	14.6
	4.75625	2.2		11.85	18
	4.40625	2.7		12.05625	21
	4.8687499999999995	3.3		13.5125	15.2
	5.375000000000001	6.6		13.23125	11.7
	5.53125	6.6		12.325000000000001	9.8
	5.312500000000001	5		12.874999999999998	17.7
	6.756249999999999	4.4		14.831250000000002	12.1
	7.6125	5.2		15.131250000000001	12.4
	7.549999999999999	3		14.293749999999998	23.4
	7.312500000000001	11		13.6	30.8
	7.2124999999999995	14.5		14.71875	27.1
	7.668750000000001	8.2		16.4375	20.2
	7.11875	4.5		14.74375	16.1
	6.44375	3.3		13.5	11.3
	6.9624999999999995	8.6		15.325000000000001	22.3
	7.4125	8.1		16.225	18.9
	7.5625	3.6		16.500000000000004	18
	7.124999999999999	4.1		15.75625	14.9
	7.425	9.3		16.218750000000004	14.6
May	8.95	8.7		18.1375	13
	10.575000000000001	7.7		18.30625	27.7
	9.456249999999999	15.1		17.918749999999996	32.2
	9.20625	12.5		17.8625	22.9
	8.81875	10.9		16.800000000000004	37.4
	9.637499999999998	15.8		17.812500000000004	29.5
	9.51875	8.8		17.91875	21.9
	9.806249999999999	6.5		18.137500000000003	20.7
	10.01875	6.3		19.206249999999997	20.3
	10.175	8.9		19.287499999999998	15.1
	10.218749999999998	11.1		18.94375	23.8
	11.14375	11.4		21.5125	31.4
	11.818750000000001	15.6		21.28125	32.5
	11.65	14.1		19.58125	22.1
	11.675	9.7		19.8875	20.7
	12.1625	6.3		20.849999999999998	13.4
	12.118749999999999	4.3		20.63125	19.4
	12.3	8.3		21.05625	17.5
	11.568750000000001	7		20.325	25.6
	10.924999999999999	11		18.21875	29.5
	11.09375	13.7		18.11875	31.6
	11.493750000000002	15.1		19.89375	32.2
	12.48125	13.9		20.26875	24.5
	12.737499999999999	14.4		20.568750000000005	25
	13.187500000000004	10.6		21.875	25.7
	13.05625	13.1		21.73125	31.1
	12.743750000000002	16.6		20.068749999999994	33.4
	12.631250000000001	20.8		20.562499999999996	30.1
	13.34375	19.6		21.21875	30.5
	13.668750000000001	17.5		21.08125	32.2
	12.868749999999999	16.3		20.318749999999998	33.6
Jun.	12.993749999999999	17.6		20.374999999999996	27.8
	13.1	13.9		21.424999999999997	26.6
	13.625000000000002	12.3		21.66875	27.7
	13.875	15.9		22.887499999999996	26.8
	14.98125	15		23.5625	27.4
	14.956249999999999	15.7		24.381249999999998	25.3
	15.768750000000002	14		25.237500000000004	27.3
	15.456249999999999	13.3		24.343749999999996	26.2
	15.456249999999999	15.9		23.462499999999995	23.1
	15.675000000000002	14.5		24.96875	29
	16.2	15.3		24.66875	29.6
	15.09375	17.3		23.593749999999996	23.3
	15.693750000000001	16.2		23.66875	26.2
	15.79375	14.5		23.85	29
	16.55625	15.4		25.0375	29.8
	16.83125	14.3		25.268749999999997	32.1
	17.30625	20.5		25.743749999999995	36.5
	17.6375	24.3		25.11875	38.9
	17.093750000000004	23.8		26.36875	38.3
	16.849999999999998	22.4		25.256249999999998	34.5
	17.200000000000003	16.8		26.718749999999996	30.1
	18.675	17.4		27.89375	29.1
	18.2	15.9		26.375000000000004	20
	17.656250000000004	15.8		25.2875	30.7
	17.300000000000004	16.6		24.731250000000003	36.3
	17.125	21.5		24.687499999999996	32.6
	17.1625	15.2		25.306250000000002	32.2
	18.2625	14.4		26.125	30.6
	17.76875		15.5	25.612500000000004		34.8
	18.04375		19.7	24.874999999999996		34.5
Jul.	18.3625		21.2	26.325		30.2
	18.81875		19.7	27.05		31.1
	19.156249999999996		15.7	27.6		23.3
	18.65625		13.9	26.36875		24.1
	18.556250000000002		14.6	27.924999999999997		18.2
	19.118750000000002		13.3	27.76875		24.8
	18.756249999999998		18.3	26.9		26.3
	17.843750000000004		17.7	26.481249999999992		26.1
	17.81875		17.9	25.6375		25.5
	17.65625		17.5	25.974999999999998		25.2
	17.54375		17.2	24.81875		25.1
	17.224999999999998		17.5	25.849999999999998		26.1
	17.9875		18.1	26.468750000000004		26.5
	18.34375		18.2	26.95625		26.6
	17.787499999999998		17.9	27.0125		26.2
	18.200000000000003		18.2	25.975000000000005		26.7
	16.924999999999997		17.1	26.14375		25.3
	17.268750000000004		17.3	24.5375		24.9
	17.212500000000002		17.3	25.74375		25.8
	17.40625		17.7	26.181250000000002		26.4
	18.287499999999998		18.2	26.60625		26
	17.868749999999995		18	25.4		26.1
	17.75		17.4	26.575		25.6
	17.625		17.2	25.568749999999998		24.9
	17.375		17.1	25.0875		25.2
	17.450000000000003		17.6	25.818749999999998		25.8
	17.068749999999998		17.7	25.51875		25.9
	17.91875		17.8	25.650000000000002		25.8
	18.106250000000003		18.1	26.45625		26
	18.6125			25.531250000000004
	17.025			25.3875
Aug.	16.63125			24.475
	16.70625			24.131250000000005
	16.975			25.237499999999997
	17.2625			24.8625
	16.693749999999998			25.493750000000002
	17.0625			25.081249999999997
	16.6125			24.6375
	16.65			24.468750000000004
	15.987500000000002			23.44375
	15.993749999999999			24.8125
	16.8875			24.74375
	16.924999999999997			26.25
	16.50625			24.568749999999998
	15.425000000000002			23.724999999999998
	16.362499999999997			24.731249999999996
	16.231250000000003			25.168749999999996
	15.862499999999997			25.34375
	15.362499999999997			23.94375
	15.75			23.974999999999998
	15.843749999999995			23.937500000000004
	15.54375			24.2875
	15.856250000000001			23.74375
	15.849999999999996			23.7625
	14.850000000000001			22.756249999999994
	15.0375			23.106250000000003
	14.681249999999999			22.343749999999996
	14.381250000000001			22.05
	15.056249999999999			23.618750000000002
	14.41875			22.124999999999996
	13.91875			21.149999999999995
	13.7			22.75
Sep.	13.362499999999999			22.30625
	12.737499999999999			20.4875
	12.1625			21.13125
	13.125			21.593749999999996
	12.7			20.19375
	11.862499999999999			19.86875
	12.381249999999998			20.1875
	12.712499999999999			20.200000000000003
	12.887499999999998			20.456249999999997
	12.70625			20.656250000000004
	12.26875			20.35
	12.931249999999999			20.81875
	12.55625			20.756249999999998
	12.718749999999998			21.25
	12.4125			19.53125
	11.28125			17.775
	11.031250000000002			18.037499999999998
	10.412500000000001			16.99375
	10.15			17.224999999999998
	11.100000000000001			17.787499999999998
	10.8			17.075
	10.556249999999999			18.18125
	11.375			19.718750000000004
	10.98125			17.975
	9.325000000000001			16.693749999999998
	9.050000000000002			16.79375
	9.18125			16.30625
	8.5875			16.1125
	8.775			15.437499999999996
	9.193750000000001			16.243750000000002
Oct.	8.91875			16.31875
	8.55			15.70625
	7.575			15.61875
	6.81875			14.506250000000001
	6.4125000000000005			14.787500000000001
	8.2375			16.318749999999998
	8.3625			16.131249999999998
	8.906249999999998			16.09375
	7.737500000000001			14.618749999999997
	7.237500000000001			13.412500000000001
	7.55625			14.381250000000003
	6.950000000000001			12.556250000000004
	6.7124999999999995			13.206250000000002
	6.043749999999999			13.20625
	5.824999999999999			11.862499999999999
	5.41875			11.656250000000002
	5.437499999999999			12.681249999999999
	5.6187499999999995			13.01875
	5.043750000000001			12.275000000000002
	3.875			12.324999999999998
	3.7375000000000003			10.468749999999998
	4.3125			11.993749999999999
	5.3			12.775
	5.5625			13.38125
	3.34375			9.93125
	3.7437500000000004			10.631250000000001
	3.4812500000000006			11.081250000000002
	2.6624999999999996			9.581249999999997
	3.40625			11.25
	2.2875000000000005			9.493749999999999
	1.1375			7.6625
Nov.	1.5124999999999997			7.931250000000002
	1.725			8.731250000000001
	1.9375000000000002			8.88125
	1.2562499999999999			8.468750000000002
	0.48125000000000007			7.593749999999999
	0.49374999999999997			6.881249999999999
	-0.2625			6.79375
	0.4625			6.368750000000001
	-0.15000000000000005			6.393750000000001
	-0.49374999999999974			6.737500000000001
	0.7687499999999999			7.34375
	0.9249999999999999			7.61875
	1.2999999999999998			7.85
	-0.29374999999999996			6.087500000000001
	-0.69375			5.256249999999999
	-0.8			6.318749999999999
	0.2812499999999999			6.750000000000001
	0.6625000000000001			6.356249999999999
	0.39999999999999997			6.45625
	-1.46875			4.76875
	-1.025			5.96875
	0.175			6.43125
	-2.0125			3.5749999999999997
	-3.6187500000000004			2.0187500000000003
	-1.5187499999999998			4.575
	-1.4875			4.4375
	-1.7937499999999997			4.41875
	-1.68125			5.30625
	-1.9250000000000003			4.575
	-2.2062500000000003			3.9937499999999995
Dec.	-2.23125			4.500000000000001
	-2.71875			2.9750000000000005
	-3.1062500000000006			2.6437500000000003
	-2.3937499999999994			3.3125
	-3.3312500000000003			3.099999999999999
	-3.9			1.9
	-3.075			3.2937500000000006
	-1.6375			4.624999999999999
	-2.2937499999999997			4
	-3.3249999999999997			2.412499999999999
	-3.4750000000000005			2.2375
	-2.7875			2.775
	-3.6125			3.2250000000000005
	-3.1499999999999995			3.7875000000000005
	-4.1625			1.89375
	-4.46875			1.4125
	-3.3866666666666663			2.1866666666666665

Max Temp.

Historic Max Temp.

Min Temp.

Historic Min Temp.

Yearly Summary 2026

39°C

Highest Temp

2 Jul. 26

-18°C

Lowest Temp

31 Jan. 26

Seasonal Breakdown

Hottest MonthJuly32.48°C

Coldest MonthFebruary-7.48°C

Wettest MonthMarch8.05mm

Windiest MonthJanuary23.13km/h

Portsmouth Climate Change InsightsSee how climate patterns are evolving over time. Temperature shifts, rainfall trends, and extreme events—all in one place.

Weather City Ranking GloballyExplore Real time of the world’s hottest & Coldest Cities based on current temperature data.

Frequently Asked Questions

1. What is the hottest month in Portsmouth historically?

July is historically Portsmouth's hottest month, with average maximum temperatures around 27°C. During peak heatwave events, the highest recorded temperatures have reached 39°C on 2026-07-02.

2. What is the coldest month in Portsmouth historically?

January is Portsmouth's coldest month, with average minimum temperatures around -6°C. The all-time record low of -25°C was recorded on 2023-02-04.

3. What is the average annual rainfall in Portsmouth over the past 17 years?

Portsmouth's average annual rainfall is approximately 1268.4mm, based on records spanning 17 years.

4. How many rainy days does Portsmouth experience on average per year?

Portsmouth historically records approximately 168.05 rainy days per year. December has the highest number of rain days at an average of 14.2 days.

5. What is the all-time highest temperature ever recorded in Portsmouth?

The all-time highest temperature recorded in Portsmouth is 39°C on 2026-07-02.

6. What is the all-time lowest temperature ever recorded in Portsmouth?

The all-time lowest temperature recorded in Portsmouth is -25°C on 2023-02-04.

7. What is the windiest time of year in Portsmouth historically?

Portsmouth experiences its strongest winds during January. The historic gust record of 60.7 kph was recorded on 2012-10-29.

8. What is the highest and lowest humidity in Portsmouth during a year?

Usually, Portsmouth's humidity peaks in June at around 77.2% and drops to its lowest in November at approximately 72.03%.

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Portsmouth Historic Weather Records
Analyse hottest, coldest, windiest & wettest days

Portsmouth Weather Trend Graph

Yearly Summary 2026

Seasonal Breakdown

Frequently Asked Questions

Recent Blogs On Weather

World Top 10 Hottest Cities Are All in India Again - May 2026

Delhi Air Quality 2026 vs 6-Year Historical PM2.5 Data

What 17 Years of Delhi Temperature Data Reveal About May's Heatwave Escalation

World Top Hottest Cities Belong to India - April 2026

Construction Air Pollution: The Invisible Hazard Reshaping India's Urban Air

Kitchen Air Pollution: How Cooking Can Spike Your Indoor AQI

Mumbai Air Quality Comparison of 2025 Vs 2026 (Jan-Feb)

Why AQI Standards Vary Across the World - And Why Air Quality Index Matters More Than Ever

Why Winter Suffocates and Monsoon Saves Delhi Air Quality 2025?

Winter vs Summer Air: Why Air Pollution Behaves So Differently Across Seasons

Portsmouth Historic Weather RecordsAnalyse hottest, coldest, windiest & wettest days

Portsmouth Weather Trend Graph

Yearly Summary 2026

Seasonal Breakdown

Frequently Asked Questions

Recent Blogs On Weather

World Top 10 Hottest Cities Are All in India Again - May 2026

Delhi Air Quality 2026 vs 6-Year Historical PM2.5 Data

What 17 Years of Delhi Temperature Data Reveal About May's Heatwave Escalation

World Top Hottest Cities Belong to India - April 2026

Construction Air Pollution: The Invisible Hazard Reshaping India's Urban Air

Kitchen Air Pollution: How Cooking Can Spike Your Indoor AQI

Mumbai Air Quality Comparison of 2025 Vs 2026 (Jan-Feb)

Why AQI Standards Vary Across the World - And Why Air Quality Index Matters More Than Ever

Why Winter Suffocates and Monsoon Saves Delhi Air Quality 2025?

Winter vs Summer Air: Why Air Pollution Behaves So Differently Across Seasons

Portsmouth Historic Weather Records
Analyse hottest, coldest, windiest & wettest days