Portsmouth weather by month

Check out Portsmouth weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

Temperature
Rainfall
Sunshine & UV index

Temperature in Portsmouth (°F)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Max temperature (daytime)	45	45	50	54	61	66	70	70	64	59	52	48
Min temperature (night-time)	37	37	39	41	46	54	55	57	54	50	43	39
Heat & Humidity	0	0	0	0	0	0	0	0	0	0	0	0
Sea temperature	46	45	45	48	54	57	63	64	63	59	54	50

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

Sunshine & UV index in Portsmouth

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Daily hours of sunshine	2	3	4	6	7	8	8	7	5	4	3	2
Daily hours of daylight	9	10	12	14	16	16	16	14	13	11	9	8
UV Index (Maximum)	1	1	3	4	6	6	6	6	4	2	1	1

Rainfall in Portsmouth

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Number of days with some rain	17	12	14	12	12	10	9	10	11	14	15	16
Average monthly rainfall (inches)	3.1	2.1	2.4	1.9	1.9	1.7	1.5	2.1	2.5	3.0	3.1	3.1

More about Portsmouth

Portsmouth by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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The climate guide for England (Portsmouth) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

What's the climate like in Portsmouth?

Portsmouth has a temperate climate with warm summers and some rainfall in all months.

Portsmouth weather in January

Expect daytime maximum temperatures of 45°F in Portsmouth, England in January based on long-term weather averages. There are 2 hours of sunshine per day on average with 17 days with some rainfall and typically 3.1 inches of rainfall in the month.

45
45°F max day temperature
2
2 hours of sunshine per day
17
17 days with some rainfall
37
37°F min night temperature
9
9 hours of daylight per day
0
No heat & humidity
3.1
3.1 inches of monthly rainfall
1
1 (Low) UV index
46
46°F sea temperature

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Portsmouth weather in February

Expect daytime maximum temperatures of 45°F in Portsmouth, England in February based on long-term weather averages. There are 3 hours of sunshine per day on average with 12 days with some rainfall and typically 2.1 inches of rainfall in the month.

45
45°F max day temperature
3
3 hours of sunshine per day
12
12 days with some rainfall
37
37°F min night temperature
10
10 hours of daylight per day
0
No heat & humidity
2.1
2.1 inches of monthly rainfall
1
1 (Low) UV index
45
45°F sea temperature

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Portsmouth weather in March

Expect daytime maximum temperatures of 50°F in Portsmouth, England in March based on long-term weather averages. There are 4 hours of sunshine per day on average with 14 days with some rainfall and typically 2.4 inches of rainfall in the month.

50
50°F max day temperature
4
4 hours of sunshine per day
14
14 days with some rainfall
39
39°F min night temperature
12
12 hours of daylight per day
0
No heat & humidity
2.4
2.4 inches of monthly rainfall
3
3 (Moderate) UV index
45
45°F sea temperature

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Portsmouth weather in April

Expect daytime maximum temperatures of 54°F in Portsmouth, England in April based on long-term weather averages. There are 6 hours of sunshine per day on average with 12 days with some rainfall and typically 1.9 inches of rainfall in the month.

54
54°F max day temperature
6
6 hours of sunshine per day
12
12 days with some rainfall
41
41°F min night temperature
14
14 hours of daylight per day
0
No heat & humidity
1.9
1.9 inches of monthly rainfall
4
4 (Moderate) UV index
48
48°F sea temperature

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Portsmouth weather in May

Expect daytime maximum temperatures of 61°F in Portsmouth, England in May based on long-term weather averages. There are 7 hours of sunshine per day on average with 12 days with some rainfall and typically 1.9 inches of rainfall in the month.

61
61°F max day temperature
7
7 hours of sunshine per day
12
12 days with some rainfall
46
46°F min night temperature
16
16 hours of daylight per day
0
No heat & humidity
1.9
1.9 inches of monthly rainfall
6
6 (High) UV index
54
54°F sea temperature

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Portsmouth weather in June

Expect daytime maximum temperatures of 66°F in Portsmouth, England in June based on long-term weather averages. There are 8 hours of sunshine per day on average with 10 days with some rainfall and typically 1.7 inches of rainfall in the month.

66
66°F max day temperature
8
8 hours of sunshine per day
10
10 days with some rainfall
54
54°F min night temperature
16
16 hours of daylight per day
0
No heat & humidity
1.7
1.7 inches of monthly rainfall
6
6 (High) UV index
57
57°F sea temperature

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Portsmouth weather in July

Expect daytime maximum temperatures of 70°F in Portsmouth, England in July based on long-term weather averages. There are 8 hours of sunshine per day on average.

70
70°F max day temperature
8
8 hours of sunshine per day
9
9 days with some rainfall
55
55°F min night temperature
16
16 hours of daylight per day
0
No heat & humidity
1.5
1.5 inches of monthly rainfall
6
6 (High) UV index
63
63°F sea temperature

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Portsmouth weather in August

Expect daytime maximum temperatures of 70°F in Portsmouth, England in August based on long-term weather averages. There are 7 hours of sunshine per day on average with 10 days with some rainfall and typically 2.1 inches of rainfall in the month.

70
70°F max day temperature
7
7 hours of sunshine per day
10
10 days with some rainfall
57
57°F min night temperature
14
14 hours of daylight per day
0
No heat & humidity
2.1
2.1 inches of monthly rainfall
6
6 (High) UV index
64
64°F sea temperature

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Portsmouth weather in September

Expect daytime maximum temperatures of 64°F in Portsmouth, England in September based on long-term weather averages. There are 5 hours of sunshine per day on average with 11 days with some rainfall and typically 2.5 inches of rainfall in the month.

64
64°F max day temperature
5
5 hours of sunshine per day
11
11 days with some rainfall
54
54°F min night temperature
13
13 hours of daylight per day
0
No heat & humidity
2.5
2.5 inches of monthly rainfall
4
4 (Moderate) UV index
63
63°F sea temperature

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Portsmouth weather in October

Expect daytime maximum temperatures of 59°F in Portsmouth, England in October based on long-term weather averages. There are 4 hours of sunshine per day on average with 14 days with some rainfall and typically 3.0 inches of rainfall in the month.

59
59°F max day temperature
4
4 hours of sunshine per day
14
14 days with some rainfall
50
50°F min night temperature
11
11 hours of daylight per day
0
No heat & humidity
3.0
3.0 inches of monthly rainfall
2
2 (Low) UV index
59
59°F sea temperature

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Portsmouth weather in November

Expect daytime maximum temperatures of 52°F in Portsmouth, England in November based on long-term weather averages. There are 3 hours of sunshine per day on average with 15 days with some rainfall and typically 3.1 inches of rainfall in the month.

52
52°F max day temperature
3
3 hours of sunshine per day
15
15 days with some rainfall
43
43°F min night temperature
9
9 hours of daylight per day
0
No heat & humidity
3.1
3.1 inches of monthly rainfall
1
1 (Low) UV index
54
54°F sea temperature

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Portsmouth weather in December

Expect daytime maximum temperatures of 48°F in Portsmouth, England in December based on long-term weather averages. There are 2 hours of sunshine per day on average with 16 days with some rainfall and typically 3.1 inches of rainfall in the month.