Portland weather

The Portland weather guide shows monthly weather averages (including daytime and night-time temperatures, rainfall and hours of sunshine) for holidays in Portland, Dorset, England in 2026/2027.

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Portland weather averages

Check the Portland 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 Portland, Dorset, England.

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Portland weather by month

Check the weather for Portland, Dorset, 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.

• January
• February
• March
• April
• May
• June
• July
• August
• September
• October
• November
• December

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Portland weather in January

The average maximum daytime temperature in Portland in January is a cool 8°C (46°F), while the average minimum night-time temperature is a cold 2°C (36°F). You can expect on average 2 hours of sunshine a day in Portland during January.

• 8
  8°C max day temperature
• 2
  2 hours of sunshine per day
• 17
  17 days with some rainfall
• 2
  2°C min night temperature
• 98
  98 mm of monthly rainfall

On average 98 mm (3.9 inches) of rain normally falls in Portland during January with rain falling on 17 days of the month.

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Portland weather in February

The average maximum daytime temperature in Portland in February is a cool 8°C (46°F), while the average minimum night-time temperature is a cold 2°C (36°F). You can expect on average 3 hours of sunshine a day in Portland during February.

• 8
  8°C max day temperature
• 3
  3 hours of sunshine per day
• 14
  14 days with some rainfall
• 2
  2°C min night temperature
• 75
  75 mm of monthly rainfall

On average 75 mm (3 inches) of rain normally falls in Portland during February with rain falling on 14 days of the month.

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Portland weather in March

The average maximum daytime temperature in Portland in March is a cool 10°C (50°F), while the average minimum night-time temperature is a cold 3°C (37°F). You can expect on average 4 hours of sunshine a day in Portland during March.

• 10
  10°C max day temperature
• 4
  4 hours of sunshine per day
• 16
  16 days with some rainfall
• 3
  3°C min night temperature
• 75
  75 mm of monthly rainfall

On average 75 mm (3 inches) of rain normally falls in Portland during March with rain falling on 16 days of the month.

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Portland weather in April

The average maximum daytime temperature in Portland in April is a cool 12°C (54°F), while the average minimum night-time temperature is a cold 4°C (39°F). You can expect on average 6 hours of sunshine a day in Portland during April.

• 12
  12°C max day temperature
• 6
  6 hours of sunshine per day
• 13
  13 days with some rainfall
• 4
  4°C min night temperature
• 58
  58 mm of monthly rainfall

On average 58 mm (2.3 inches) of rain normally falls in Portland during April with rain falling on 13 days of the month.

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Portland weather in May

The average maximum daytime temperature in Portland in May is a comfortable 16°C (61°F), while the average minimum night-time temperature is a cold 7°C (45°F). You can expect on average 7 hours of sunshine a day in Portland during May.

• 16
  16°C max day temperature
• 7
  7 hours of sunshine per day
• 12
  12 days with some rainfall
• 7
  7°C min night temperature
• 55
  55 mm of monthly rainfall

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

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Portland weather in June

The average maximum daytime temperature in Portland in June is a comfortable 18°C (64°F), while the average minimum night-time temperature is a cool 10°C (50°F). You can expect on average 7 hours of sunshine a day in Portland during June.

• 18
  18°C max day temperature
• 7
  7 hours of sunshine per day
• 11
  11 days with some rainfall
• 10
  10°C min night temperature
• 59
  59 mm of monthly rainfall

On average 59 mm (2.3 inches) of rain normally falls in Portland during June with rain falling on 11 days of the month.

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Portland weather in July

The average maximum daytime temperature in Portland in July is a comfortable 21°C (70°F), while the average minimum night-time temperature is a cool 12°C (54°F). You can expect on average 7 hours of sunshine a day in Portland during July.

• 21
  21°C max day temperature
• 7
  7 hours of sunshine per day
• 10
  10 days with some rainfall
• 12
  12°C min night temperature
• 42
  42 mm of monthly rainfall

On average 42 mm (1.7 inches) of rain normally falls in Portland during July with rain falling on 10 days of the month.

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Portland weather in August

The average maximum daytime temperature in Portland in August is a comfortable 21°C (70°F), while the average minimum night-time temperature is a cool 12°C (54°F). You can expect on average 7 hours of sunshine a day in Portland during August.

• 21
  21°C max day temperature
• 7
  7 hours of sunshine per day
• 11
  11 days with some rainfall
• 12
  12°C min night temperature
• 65
  65 mm of monthly rainfall

On average 65 mm (2.6 inches) of rain normally falls in Portland during August with rain falling on 11 days of the month.

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Portland weather in September

The average maximum daytime temperature in Portland in September is a comfortable 18°C (64°F), while the average minimum night-time temperature is a cool 10°C (50°F). You can expect on average 5 hours of sunshine a day in Portland during September.

• 18
  18°C max day temperature
• 5
  5 hours of sunshine per day
• 13
  13 days with some rainfall
• 10
  10°C min night temperature
• 78
  78 mm of monthly rainfall

On average 78 mm (3.1 inches) of rain normally falls in Portland during September with rain falling on 13 days of the month.

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Portland weather in October

The average maximum daytime temperature in Portland in October is a comfortable 14°C (57°F), while the average minimum night-time temperature is a cold 7°C (45°F). You can expect on average 4 hours of sunshine a day in Portland during October.

• 14
  14°C max day temperature
• 4
  4 hours of sunshine per day
• 16
  16 days with some rainfall
• 7
  7°C min night temperature
• 96
  96 mm of monthly rainfall

On average 96 mm (3.8 inches) of rain normally falls in Portland during October with rain falling on 16 days of the month.

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Portland weather in November

The average maximum daytime temperature in Portland in November is a cool 11°C (52°F), while the average minimum night-time temperature is a cold 4°C (39°F). You can expect on average 3 hours of sunshine a day in Portland during November.

• 11
  11°C max day temperature
• 3
  3 hours of sunshine per day
• 16
  16 days with some rainfall
• 4
  4°C min night temperature
• 100
  100 mm of monthly rainfall

On average 100 mm (3.9 inches) of rain normally falls in Portland during November with rain falling on 16 days of the month.

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Portland weather in December

The average maximum daytime temperature in Portland in December is a cool 9°C (48°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 Portland during December.

• 9
  9°C max day temperature
• 2
  2 hours of sunshine per day
• 17
  17 days with some rainfall
• 3
  3°C min night temperature
• 112
  112 mm of monthly rainfall

On average 112 mm (4.4 inches) of rain normally falls in Portland during December with rain falling on 17 days of the month.

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