Portsmouth weather by month

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

Temperature in Portsmouth (°F)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
45°F maximum daytime temperature in January in Portsmouth45
45°F maximum daytime temperature in February in Portsmouth45
50°F maximum daytime temperature in March in Portsmouth50
54°F maximum daytime temperature in April in Portsmouth54
61°F maximum daytime temperature in May in Portsmouth61
66°F maximum daytime temperature in June in Portsmouth66
70°F maximum daytime temperature in July in Portsmouth70
70°F maximum daytime temperature in August in Portsmouth70
64°F maximum daytime temperature in September in Portsmouth64
59°F maximum daytime temperature in October in Portsmouth59
52°F maximum daytime temperature in November in Portsmouth52
48°F maximum daytime temperature in December in Portsmouth48
Min temperature (night-time)
37°F minimum night-time temperature in January in Portsmouth37
37°F minimum night-time temperature in February in Portsmouth37
39°F minimum night-time temperature in March in Portsmouth39
41°F minimum night-time temperature in April in Portsmouth41
46°F minimum night-time temperature in May in Portsmouth46
54°F minimum night-time temperature in June in Portsmouth54
55°F minimum night-time temperature in July in Portsmouth55
57°F minimum night-time temperature in August in Portsmouth57
54°F minimum night-time temperature in September in Portsmouth54
50°F minimum night-time temperature in October in Portsmouth50
43°F minimum night-time temperature in November in Portsmouth43
39°F minimum night-time temperature in December in Portsmouth39
Heat & Humidity
No heat & humidity in January in Portsmouth0
No heat & humidity in February in Portsmouth0
No heat & humidity in March in Portsmouth0
No heat & humidity in April in Portsmouth0
No heat & humidity in May in Portsmouth0
No heat & humidity in June in Portsmouth0
No heat & humidity in July in Portsmouth0
No heat & humidity in August in Portsmouth0
No heat & humidity in September in Portsmouth0
No heat & humidity in October in Portsmouth0
No heat & humidity in November in Portsmouth0
No heat & humidity in December in Portsmouth0
Sea temperature
46°F sea temperature in January in Portsmouth46
45°F sea temperature in February in Portsmouth45
45°F sea temperature in March in Portsmouth45
48°F sea temperature in April in Portsmouth48
54°F sea temperature in May in Portsmouth54
57°F sea temperature in June in Portsmouth57
63°F sea temperature in July in Portsmouth63
64°F sea temperature in August in Portsmouth64
63°F sea temperature in September in Portsmouth63
59°F sea temperature in October in Portsmouth59
54°F sea temperature in November in Portsmouth54
50°F sea temperature in December in Portsmouth50

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

Sunshine & Daylight in Portsmouth

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
9 hours of daylight per day in January in Portsmouth9
10 hours of daylight per day in February in Portsmouth10
12 hours of daylight per day in March in Portsmouth12
14 hours of daylight per day in April in Portsmouth14
16 hours of daylight per day in May in Portsmouth16
16 hours of daylight per day in June in Portsmouth16
16 hours of daylight per day in July in Portsmouth16
14 hours of daylight per day in August in Portsmouth14
13 hours of daylight per day in September in Portsmouth13
11 hours of daylight per day in October in Portsmouth11
9 hours of daylight per day in November in Portsmouth9
8 hours of daylight per day in December in Portsmouth8
UV Index (Maximum)
UV (maximum) index 1 (Low) in January in Portsmouth1
UV (maximum) index 1 (Low) in February in Portsmouth1
UV (maximum) index 3 (Moderate) in March in Portsmouth3
UV (maximum) index 4 (Moderate) in April in Portsmouth4
UV (maximum) index 6 (High) in May in Portsmouth6
UV (maximum) index 6 (High) in June in Portsmouth6
UV (maximum) index 6 (High) in July in Portsmouth6
UV (maximum) index 6 (High) in August in Portsmouth6
UV (maximum) index 4 (Moderate) in September in Portsmouth4
UV (maximum) index 2 (Low) in October in Portsmouth2
UV (maximum) index 1 (Low) in November in Portsmouth1
UV (maximum) index 1 (Low) in December in Portsmouth1

Rainfall in Portsmouth

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
17 days with some rainfall in January in Portsmouth17
12 days with some rainfall in February in Portsmouth12
14 days with some rainfall in March in Portsmouth14
12 days with some rainfall in April in Portsmouth12
12 days with some rainfall in May in Portsmouth12
10 days with some rainfall in June in Portsmouth10
9 days with some rainfall in July in Portsmouth9
10 days with some rainfall in August in Portsmouth10
11 days with some rainfall in September in Portsmouth11
14 days with some rainfall in October in Portsmouth14
15 days with some rainfall in November in Portsmouth15
16 days with some rainfall in December in Portsmouth16
Average monthly rainfall (inches)
3.1 inches monthly rainfall in January in Portsmouth3.1
2.1 inches monthly rainfall in February in Portsmouth2.1
2.4 inches monthly rainfall in March in Portsmouth2.4
1.9 inches monthly rainfall in April in Portsmouth1.9
1.9 inches monthly rainfall in May in Portsmouth1.9
1.7 inches monthly rainfall in June in Portsmouth1.7
1.5 inches monthly rainfall in July in Portsmouth1.5
2.1 inches monthly rainfall in August in Portsmouth2.1
2.5 inches monthly rainfall in September in Portsmouth2.5
3.0 inches monthly rainfall in October in Portsmouth3.0
3.1 inches monthly rainfall in November in Portsmouth3.1
3.1 inches monthly rainfall in December in Portsmouth3.1

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.

Metric (°C)  |  Imperial (°F)

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Tropical storm risk: Portsmouth hurricane season

% of month affected by tropical storms
0
0
0
0
0
0
0
0
0
0
0
0
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

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More about England

Compare Portsmouth with the USA

Below the Portsmouth chart shows average maximum daytime temperature for Portsmouth, England, UK and the USA (Washington).

Maximum daytime temperature (°F)

Portsmouth, England, UK
USA (Washington)
45
41
45
45
50
55
54
66
61
75
66
84
70
88
70
86
64
79
59
68
52
57
48
46
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C)  |  Imperial (°F)

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