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 (°C)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Max temperature (daytime)	7	7	10	12	16	19	21	21	18	15	11	9
Min temperature (night-time)	3	3	4	5	8	12	13	14	12	10	6	4
Heat & Humidity	0	0	0	0	0	0	0	0	0	0	0	0
Sea temperature	8	7	7	9	12	14	17	18	17	15	12	10

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 (mm)	79	53	60	47	48	44	39	53	63	75	80	78

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 7°C 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 79 mm of rainfall in the month.

7
7°C max day temperature
2
2 hours of sunshine per day
17
17 days with some rainfall
3
3°C min night temperature
9
9 hours of daylight per day
0
No heat & humidity
79
79 mm of monthly rainfall
1
1 (Low) UV index
8
8°C sea temperature

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Portsmouth weather in February

Expect daytime maximum temperatures of 7°C 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 53 mm of rainfall in the month.

7
7°C max day temperature
3
3 hours of sunshine per day
12
12 days with some rainfall
3
3°C min night temperature
10
10 hours of daylight per day
0
No heat & humidity
53
53 mm of monthly rainfall
1
1 (Low) UV index
7
7°C sea temperature

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Portsmouth weather in March

Expect daytime maximum temperatures of 10°C 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 60 mm of rainfall in the month.

10
10°C max day temperature
4
4 hours of sunshine per day
14
14 days with some rainfall
4
4°C min night temperature
12
12 hours of daylight per day
0
No heat & humidity
60
60 mm of monthly rainfall
3
3 (Moderate) UV index
7
7°C sea temperature

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Portsmouth weather in April

Expect daytime maximum temperatures of 12°C 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 47 mm of rainfall in the month.

12
12°C max day temperature
6
6 hours of sunshine per day
12
12 days with some rainfall
5
5°C min night temperature
14
14 hours of daylight per day
0
No heat & humidity
47
47 mm of monthly rainfall
4
4 (Moderate) UV index
9
9°C sea temperature

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Portsmouth weather in May

Expect daytime maximum temperatures of 16°C 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 48 mm of rainfall in the month.

16
16°C max day temperature
7
7 hours of sunshine per day
12
12 days with some rainfall
8
8°C min night temperature
16
16 hours of daylight per day
0
No heat & humidity
48
48 mm of monthly rainfall
6
6 (High) UV index
12
12°C sea temperature

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Portsmouth weather in June

Expect daytime maximum temperatures of 19°C 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 44 mm of rainfall in the month.

19
19°C max day temperature
8
8 hours of sunshine per day
10
10 days with some rainfall
12
12°C min night temperature
16
16 hours of daylight per day
0
No heat & humidity
44
44 mm of monthly rainfall
6
6 (High) UV index
14
14°C sea temperature

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Portsmouth weather in July

Expect daytime maximum temperatures of 21°C in Portsmouth, England in July based on long-term weather averages. There are 8 hours of sunshine per day on average.

21
21°C max day temperature
8
8 hours of sunshine per day
9
9 days with some rainfall
13
13°C min night temperature
16
16 hours of daylight per day
0
No heat & humidity
39
39 mm of monthly rainfall
6
6 (High) UV index
17
17°C sea temperature

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Portsmouth weather in August

Expect daytime maximum temperatures of 21°C 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 53 mm of rainfall in the month.

21
21°C max day temperature
7
7 hours of sunshine per day
10
10 days with some rainfall
14
14°C min night temperature
14
14 hours of daylight per day
0
No heat & humidity
53
53 mm of monthly rainfall
6
6 (High) UV index
18
18°C sea temperature

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Portsmouth weather in September

Expect daytime maximum temperatures of 18°C 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 63 mm of rainfall in the month.

18
18°C max day temperature
5
5 hours of sunshine per day
11
11 days with some rainfall
12
12°C min night temperature
13
13 hours of daylight per day
0
No heat & humidity
63
63 mm of monthly rainfall
4
4 (Moderate) UV index
17
17°C sea temperature

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Portsmouth weather in October

Expect daytime maximum temperatures of 15°C 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 75 mm of rainfall in the month.

15
15°C max day temperature
4
4 hours of sunshine per day
14
14 days with some rainfall
10
10°C min night temperature
11
11 hours of daylight per day
0
No heat & humidity
75
75 mm of monthly rainfall
2
2 (Low) UV index
15
15°C sea temperature

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Portsmouth weather in November

Expect daytime maximum temperatures of 11°C 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 80 mm of rainfall in the month.

11
11°C max day temperature
3
3 hours of sunshine per day
15
15 days with some rainfall
6
6°C min night temperature
9
9 hours of daylight per day
0
No heat & humidity
80
80 mm of monthly rainfall
1
1 (Low) UV index
12
12°C sea temperature

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Portsmouth weather in December

Expect daytime maximum temperatures of 9°C 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 78 mm of rainfall in the month.