Portsmouth weather

The Portsmouth weather guide shows monthly weather averages (including daytime and night-time temperatures, rainfall and hours of sunshine) for Portsmouth, Hampshire, England.

Portsmouth weather averages

Check the Portsmouth weather averages for each month of the year including maximum daytime and minimum night-time temperatures, monthly rainfall, number of days with rain and average daily hours of sunshine for Portsmouth, Hampshire, England.

Max Day Temperature (°C)

Hours of Sunshine (daily)

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

Days with some Rainfall

Min Night Temperature (°C)

Monthly Rainfall (mm)

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Portsmouth weather by month

Check the weather for Portsmouth, Hampshire, England for a particular month by selecting from the list below. This gives the best indication of what to expect from the weather months in advance.

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Portsmouth weather in January

The average maximum daytime temperature in Portsmouth in January is a cold 7°C (45°F), while the average minimum night-time temperature is a cold 3°C (37°F). You can expect on average 2 hours of sunshine a day in Portsmouth during January.

  • 7°C maximum daytime temperature in January in Portsmouth7
    7°C max day temperature
  • 2 hours of sunshine per day in January in Portsmouth2
    2 hours of sunshine per day
  • 17 days with some rainfall in January in Portsmouth17
    17 days with some rainfall
  • 3°C minimum night-time temperature in January in Portsmouth3
    3°C min night temperature
  • 94 mm monthly rainfall in January in Portsmouth94
    94 mm of monthly rainfall

On average 94 mm (3.7 inches) of rain normally falls in Portsmouth during January with rain falling on 17 days of the month.

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Portsmouth weather in February

The average maximum daytime temperature in Portsmouth in February is a cool 8°C (46°F), while the average minimum night-time temperature is a cold 3°C (37°F). You can expect on average 3 hours of sunshine a day in Portsmouth during February.

  • 8°C maximum daytime temperature in February in Portsmouth8
    8°C max day temperature
  • 3 hours of sunshine per day in February in Portsmouth3
    3 hours of sunshine per day
  • 13 days with some rainfall in February in Portsmouth13
    13 days with some rainfall
  • 3°C minimum night-time temperature in February in Portsmouth3
    3°C min night temperature
  • 66 mm monthly rainfall in February in Portsmouth66
    66 mm of monthly rainfall

On average 66 mm (2.6 inches) of rain normally falls in Portsmouth during February with rain falling on 13 days of the month.

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Portsmouth weather in March

The average maximum daytime temperature in Portsmouth in March is a cool 10°C (50°F), while the average minimum night-time temperature is a cold 4°C (39°F). You can expect on average 4 hours of sunshine a day in Portsmouth during March.

  • 10°C maximum daytime temperature in March in Portsmouth10
    10°C max day temperature
  • 4 hours of sunshine per day in March in Portsmouth4
    4 hours of sunshine per day
  • 15 days with some rainfall in March in Portsmouth15
    15 days with some rainfall
  • 4°C minimum night-time temperature in March in Portsmouth4
    4°C min night temperature
  • 68 mm monthly rainfall in March in Portsmouth68
    68 mm of monthly rainfall

On average 68 mm (2.7 inches) of rain normally falls in Portsmouth during March with rain falling on 15 days of the month.

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Portsmouth weather in April

The average maximum daytime temperature in Portsmouth in April is a cool 12°C (54°F), while the average minimum night-time temperature is a cold 5°C (41°F). You can expect on average 6 hours of sunshine a day in Portsmouth during April.

  • 12°C maximum daytime temperature in April in Portsmouth12
    12°C max day temperature
  • 6 hours of sunshine per day in April in Portsmouth6
    6 hours of sunshine per day
  • 12 days with some rainfall in April in Portsmouth12
    12 days with some rainfall
  • 5°C minimum night-time temperature in April in Portsmouth5
    5°C min night temperature
  • 55 mm monthly rainfall in April in Portsmouth55
    55 mm of monthly rainfall

On average 55 mm (2.2 inches) of rain normally falls in Portsmouth during April with rain falling on 12 days of the month.

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Portsmouth weather in May

The average maximum daytime temperature in Portsmouth in May is a comfortable 15°C (59°F), while the average minimum night-time temperature is a cool 8°C (46°F). You can expect on average 7 hours of sunshine a day in Portsmouth during May.

  • 15°C maximum daytime temperature in May in Portsmouth15
    15°C max day temperature
  • 7 hours of sunshine per day in May in Portsmouth7
    7 hours of sunshine per day
  • 12 days with some rainfall in May in Portsmouth12
    12 days with some rainfall
  • 8°C minimum night-time temperature in May in Portsmouth8
    8°C min night temperature
  • 50 mm monthly rainfall in May in Portsmouth50
    50 mm of monthly rainfall

On average 50 mm (2 inches) of rain normally falls in Portsmouth during May with rain falling on 12 days of the month.

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Portsmouth weather in June

The average maximum daytime temperature in Portsmouth in June is a comfortable 18°C (64°F), while the average minimum night-time temperature is a cool 11°C (52°F). You can expect on average 8 hours of sunshine a day in Portsmouth during June.

  • 18°C maximum daytime temperature in June in Portsmouth18
    18°C max day temperature
  • 8 hours of sunshine per day in June in Portsmouth8
    8 hours of sunshine per day
  • 10 days with some rainfall in June in Portsmouth10
    10 days with some rainfall
  • 11°C minimum night-time temperature in June in Portsmouth11
    11°C min night temperature
  • 50 mm monthly rainfall in June in Portsmouth50
    50 mm of monthly rainfall

On average 50 mm (2 inches) of rain normally falls in Portsmouth during June with rain falling on 10 days of the month.

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Portsmouth weather in July

The average maximum daytime temperature in Portsmouth in July is a comfortable 21°C (70°F), while the average minimum night-time temperature is a cool 13°C (55°F). You can expect on average 8 hours of sunshine a day in Portsmouth during July.

  • 21°C maximum daytime temperature in July in Portsmouth21
    21°C max day temperature
  • 8 hours of sunshine per day in July in Portsmouth8
    8 hours of sunshine per day
  • 9 days with some rainfall in July in Portsmouth9
    9 days with some rainfall
  • 13°C minimum night-time temperature in July in Portsmouth13
    13°C min night temperature
  • 41 mm monthly rainfall in July in Portsmouth41
    41 mm of monthly rainfall

On average 41 mm (1.6 inches) of rain normally falls in Portsmouth during July with rain falling on 9 days of the month.

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Portsmouth weather in August

The average maximum daytime temperature in Portsmouth in August is a comfortable 21°C (70°F), while the average minimum night-time temperature is a cool 13°C (55°F). You can expect on average 7 hours of sunshine a day in Portsmouth during August.

  • 21°C maximum daytime temperature in August in Portsmouth21
    21°C max day temperature
  • 7 hours of sunshine per day in August in Portsmouth7
    7 hours of sunshine per day
  • 10 days with some rainfall in August in Portsmouth10
    10 days with some rainfall
  • 13°C minimum night-time temperature in August in Portsmouth13
    13°C min night temperature
  • 58 mm monthly rainfall in August in Portsmouth58
    58 mm of monthly rainfall

On average 58 mm (2.3 inches) of rain normally falls in Portsmouth during August with rain falling on 10 days of the month.

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Portsmouth weather in September

The average maximum daytime temperature in Portsmouth in September is a comfortable 18°C (64°F), while the average minimum night-time temperature is a cool 11°C (52°F). You can expect on average 5 hours of sunshine a day in Portsmouth during September.

  • 18°C maximum daytime temperature in September in Portsmouth18
    18°C max day temperature
  • 5 hours of sunshine per day in September in Portsmouth5
    5 hours of sunshine per day
  • 12 days with some rainfall in September in Portsmouth12
    12 days with some rainfall
  • 11°C minimum night-time temperature in September in Portsmouth11
    11°C min night temperature
  • 73 mm monthly rainfall in September in Portsmouth73
    73 mm of monthly rainfall

On average 73 mm (2.9 inches) of rain normally falls in Portsmouth during September with rain falling on 12 days of the month.

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Portsmouth weather in October

The average maximum daytime temperature in Portsmouth in October is a comfortable 14°C (57°F), while the average minimum night-time temperature is a cool 9°C (48°F). You can expect on average 4 hours of sunshine a day in Portsmouth during October.

  • 14°C maximum daytime temperature in October in Portsmouth14
    14°C max day temperature
  • 4 hours of sunshine per day in October in Portsmouth4
    4 hours of sunshine per day
  • 15 days with some rainfall in October in Portsmouth15
    15 days with some rainfall
  • 9°C minimum night-time temperature in October in Portsmouth9
    9°C min night temperature
  • 93 mm monthly rainfall in October in Portsmouth93
    93 mm of monthly rainfall

On average 93 mm (3.7 inches) of rain normally falls in Portsmouth during October with rain falling on 15 days of the month.

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Portsmouth weather in November

The average maximum daytime temperature in Portsmouth in November is a cool 11°C (52°F), while the average minimum night-time temperature is a cold 6°C (43°F). You can expect on average 3 hours of sunshine a day in Portsmouth during November.

  • 11°C maximum daytime temperature in November in Portsmouth11
    11°C max day temperature
  • 3 hours of sunshine per day in November in Portsmouth3
    3 hours of sunshine per day
  • 15 days with some rainfall in November in Portsmouth15
    15 days with some rainfall
  • 6°C minimum night-time temperature in November in Portsmouth6
    6°C min night temperature
  • 99 mm monthly rainfall in November in Portsmouth99
    99 mm of monthly rainfall

On average 99 mm (3.9 inches) of rain normally falls in Portsmouth during November with rain falling on 15 days of the month.

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Portsmouth weather in December

The average maximum daytime temperature in Portsmouth in December is a cool 9°C (48°F), while the average minimum night-time temperature is a cold 4°C (39°F). You can expect on average 2 hours of sunshine a day in Portsmouth during December.

  • 9°C maximum daytime temperature in December in Portsmouth9
    9°C max day temperature
  • 2 hours of sunshine per day in December in Portsmouth2
    2 hours of sunshine per day
  • 16 days with some rainfall in December in Portsmouth16
    16 days with some rainfall
  • 4°C minimum night-time temperature in December in Portsmouth4
    4°C min night temperature
  • 98 mm monthly rainfall in December in Portsmouth98
    98 mm of monthly rainfall

On average 98 mm (3.9 inches) of rain normally falls in Portsmouth during December with rain falling on 16 days of the month.

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