Washington weather

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

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Washington weather averages

Check the Washington 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 Washington, West Sussex, England.

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Washington weather by month

Check the weather for Washington, West Sussex, 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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Washington weather in January

The average maximum daytime temperature in Washington 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 Washington during January.

• 7
  7°C max day temperature
• 2
  2 hours of sunshine per day
• 16
  16 days with some rainfall
• 3
  3°C min night temperature
• 99
  99 mm of monthly rainfall

On average 99 mm (3.9 inches) of rain normally falls in Washington during January with rain falling on 16 days of the month.

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Washington weather in February

The average maximum daytime temperature in Washington in February is a cold 7°C (45°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 Washington during February.

• 7
  7°C max day temperature
• 3
  3 hours of sunshine per day
• 14
  14 days with some rainfall
• 2
  2°C min night temperature
• 61
  61 mm of monthly rainfall

On average 61 mm (2.4 inches) of rain normally falls in Washington during February with rain falling on 14 days of the month.

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Washington weather in March

The average maximum daytime temperature in Washington in March 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 4 hours of sunshine a day in Washington during March.

• 9
  9°C max day temperature
• 4
  4 hours of sunshine per day
• 15
  15 days with some rainfall
• 4
  4°C min night temperature
• 67
  67 mm of monthly rainfall

On average 67 mm (2.6 inches) of rain normally falls in Washington during March with rain falling on 15 days of the month.

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Washington weather in April

The average maximum daytime temperature in Washington 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 Washington during April.

• 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
• 57
  57 mm of monthly rainfall

On average 57 mm (2.2 inches) of rain normally falls in Washington during April with rain falling on 12 days of the month.

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Washington weather in May

The average maximum daytime temperature in Washington in May is a comfortable 15°C (59°F), while the average minimum night-time temperature is a cool 9°C (48°F). You can expect on average 7 hours of sunshine a day in Washington during May.

• 15
  15°C max day temperature
• 7
  7 hours of sunshine per day
• 12
  12 days with some rainfall
• 9
  9°C min night temperature
• 52
  52 mm of monthly rainfall

On average 52 mm (2 inches) of rain normally falls in Washington during May with rain falling on 12 days of the month.

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Washington weather in June

The average maximum daytime temperature in Washington 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 7 hours of sunshine a day in Washington during June.

• 18
  18°C max day temperature
• 7
  7 hours of sunshine per day
• 11
  11 days with some rainfall
• 11
  11°C min night temperature
• 63
  63 mm of monthly rainfall

On average 63 mm (2.5 inches) of rain normally falls in Washington during June with rain falling on 11 days of the month.

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Washington weather in July

The average maximum daytime temperature in Washington in July is a comfortable 20°C (68°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 Washington during July.

• 20
  20°C max day temperature
• 7
  7 hours of sunshine per day
• 10
  10 days with some rainfall
• 13
  13°C min night temperature
• 43
  43 mm of monthly rainfall

On average 43 mm (1.7 inches) of rain normally falls in Washington during July with rain falling on 10 days of the month.

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Washington weather in August

The average maximum daytime temperature in Washington in August is a comfortable 21°C (70°F), while the average minimum night-time temperature is a comfortable 14°C (57°F). You can expect on average 7 hours of sunshine a day in Washington during August.

• 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
• 55
  55 mm of monthly rainfall

On average 55 mm (2.2 inches) of rain normally falls in Washington during August with rain falling on 10 days of the month.

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Washington weather in September

The average maximum daytime temperature in Washington in September is a comfortable 18°C (64°F), while the average minimum night-time temperature is a cool 12°C (54°F). You can expect on average 5 hours of sunshine a day in Washington during September.

• 18
  18°C max day temperature
• 5
  5 hours of sunshine per day
• 12
  12 days with some rainfall
• 12
  12°C min night temperature
• 84
  84 mm of monthly rainfall

On average 84 mm (3.3 inches) of rain normally falls in Washington during September with rain falling on 12 days of the month.

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Washington weather in October

The average maximum daytime temperature in Washington in October is a comfortable 15°C (59°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 Washington during October.

• 15
  15°C max day temperature
• 4
  4 hours of sunshine per day
• 14
  14 days with some rainfall
• 9
  9°C min night temperature
• 103
  103 mm of monthly rainfall

On average 103 mm (4.1 inches) of rain normally falls in Washington during October with rain falling on 14 days of the month.

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Washington weather in November

The average maximum daytime temperature in Washington 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 Washington during November.

• 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
• 102
  102 mm of monthly rainfall

On average 102 mm (4 inches) of rain normally falls in Washington during November with rain falling on 15 days of the month.

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Washington weather in December

The average maximum daytime temperature in Washington in December is a cool 8°C (46°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 Washington during December.

• 8
  8°C max day temperature
• 2
  2 hours of sunshine per day
• 16
  16 days with some rainfall
• 4
  4°C min night temperature
• 97
  97 mm of monthly rainfall

On average 97 mm (3.8 inches) of rain normally falls in Washington during December with rain falling on 16 days of the month.

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