Harrow weather

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

Harrow weather averages

Check the Harrow 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 Harrow, Greater London, 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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Harrow weather by month

Check the weather for Harrow, Greater London, 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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Harrow weather in January

The average maximum daytime temperature in Harrow in January is a cold 7°C (45°F), while the average minimum night-time temperature is a cold 1°C (34°F). You can expect on average 2 hours of sunshine a day in Harrow during January.

  • 7°C maximum daytime temperature in January in Harrow7
    7°C max day temperature
  • 2 hours of sunshine per day in January in Harrow2
    2 hours of sunshine per day
  • 17 days with some rainfall in January in Harrow17
    17 days with some rainfall
  • 1°C minimum night-time temperature in January in Harrow1
    1°C min night temperature
  • 65 mm monthly rainfall in January in Harrow65
    65 mm of monthly rainfall

On average 65 mm (2.6 inches) of rain normally falls in Harrow during January with rain falling on 17 days of the month.

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Harrow weather in February

The average maximum daytime temperature in Harrow in February is a cold 7°C (45°F), while the average minimum night-time temperature is a cold 1°C (34°F). You can expect on average 2 hours of sunshine a day in Harrow during February.

  • 7°C maximum daytime temperature in February in Harrow7
    7°C max day temperature
  • 2 hours of sunshine per day in February in Harrow2
    2 hours of sunshine per day
  • 13 days with some rainfall in February in Harrow13
    13 days with some rainfall
  • 1°C minimum night-time temperature in February in Harrow1
    1°C min night temperature
  • 43 mm monthly rainfall in February in Harrow43
    43 mm of monthly rainfall

On average 43 mm (1.7 inches) of rain normally falls in Harrow during February with rain falling on 13 days of the month.

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Harrow weather in March

The average maximum daytime temperature in Harrow 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 Harrow during March.

  • 10°C maximum daytime temperature in March in Harrow10
    10°C max day temperature
  • 4 hours of sunshine per day in March in Harrow4
    4 hours of sunshine per day
  • 15 days with some rainfall in March in Harrow15
    15 days with some rainfall
  • 3°C minimum night-time temperature in March in Harrow3
    3°C min night temperature
  • 52 mm monthly rainfall in March in Harrow52
    52 mm of monthly rainfall

On average 52 mm (2 inches) of rain normally falls in Harrow during March with rain falling on 15 days of the month.

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Harrow weather in April

The average maximum daytime temperature in Harrow 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 5 hours of sunshine a day in Harrow during April.

  • 12°C maximum daytime temperature in April in Harrow12
    12°C max day temperature
  • 5 hours of sunshine per day in April in Harrow5
    5 hours of sunshine per day
  • 13 days with some rainfall in April in Harrow13
    13 days with some rainfall
  • 4°C minimum night-time temperature in April in Harrow4
    4°C min night temperature
  • 51 mm monthly rainfall in April in Harrow51
    51 mm of monthly rainfall

On average 51 mm (2 inches) of rain normally falls in Harrow during April with rain falling on 13 days of the month.

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Harrow weather in May

The average maximum daytime temperature in Harrow 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 6 hours of sunshine a day in Harrow during May.

  • 16°C maximum daytime temperature in May in Harrow16
    16°C max day temperature
  • 6 hours of sunshine per day in May in Harrow6
    6 hours of sunshine per day
  • 13 days with some rainfall in May in Harrow13
    13 days with some rainfall
  • 7°C minimum night-time temperature in May in Harrow7
    7°C min night temperature
  • 50 mm monthly rainfall in May in Harrow50
    50 mm of monthly rainfall

On average 50 mm (2 inches) of rain normally falls in Harrow during May with rain falling on 13 days of the month.

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Harrow weather in June

The average maximum daytime temperature in Harrow in June is a comfortable 19°C (66°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 Harrow during June.

  • 19°C maximum daytime temperature in June in Harrow19
    19°C max day temperature
  • 7 hours of sunshine per day in June in Harrow7
    7 hours of sunshine per day
  • 12 days with some rainfall in June in Harrow12
    12 days with some rainfall
  • 10°C minimum night-time temperature in June in Harrow10
    10°C min night temperature
  • 60 mm monthly rainfall in June in Harrow60
    60 mm of monthly rainfall

On average 60 mm (2.4 inches) of rain normally falls in Harrow during June with rain falling on 12 days of the month.

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Harrow weather in July

The average maximum daytime temperature in Harrow in July is a warm 22°C (72°F), while the average minimum night-time temperature is a cool 12°C (54°F). You can expect on average 6 hours of sunshine a day in Harrow during July.

  • 22°C maximum daytime temperature in July in Harrow22
    22°C max day temperature
  • 6 hours of sunshine per day in July in Harrow6
    6 hours of sunshine per day
  • 11 days with some rainfall in July in Harrow11
    11 days with some rainfall
  • 12°C minimum night-time temperature in July in Harrow12
    12°C min night temperature
  • 44 mm monthly rainfall in July in Harrow44
    44 mm of monthly rainfall

On average 44 mm (1.7 inches) of rain normally falls in Harrow during July with rain falling on 11 days of the month.

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Harrow weather in August

The average maximum daytime temperature in Harrow in August is a warm 22°C (72°F), while the average minimum night-time temperature is a cool 12°C (54°F). You can expect on average 6 hours of sunshine a day in Harrow during August.

  • 22°C maximum daytime temperature in August in Harrow22
    22°C max day temperature
  • 6 hours of sunshine per day in August in Harrow6
    6 hours of sunshine per day
  • 11 days with some rainfall in August in Harrow11
    11 days with some rainfall
  • 12°C minimum night-time temperature in August in Harrow12
    12°C min night temperature
  • 52 mm monthly rainfall in August in Harrow52
    52 mm of monthly rainfall

On average 52 mm (2 inches) of rain normally falls in Harrow during August with rain falling on 11 days of the month.

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Harrow weather in September

The average maximum daytime temperature in Harrow 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 Harrow during September.

  • 18°C maximum daytime temperature in September in Harrow18
    18°C max day temperature
  • 5 hours of sunshine per day in September in Harrow5
    5 hours of sunshine per day
  • 12 days with some rainfall in September in Harrow12
    12 days with some rainfall
  • 10°C minimum night-time temperature in September in Harrow10
    10°C min night temperature
  • 62 mm monthly rainfall in September in Harrow62
    62 mm of monthly rainfall

On average 62 mm (2.4 inches) of rain normally falls in Harrow during September with rain falling on 12 days of the month.

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Harrow weather in October

The average maximum daytime temperature in Harrow 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 3 hours of sunshine a day in Harrow during October.

  • 14°C maximum daytime temperature in October in Harrow14
    14°C max day temperature
  • 3 hours of sunshine per day in October in Harrow3
    3 hours of sunshine per day
  • 14 days with some rainfall in October in Harrow14
    14 days with some rainfall
  • 7°C minimum night-time temperature in October in Harrow7
    7°C min night temperature
  • 70 mm monthly rainfall in October in Harrow70
    70 mm of monthly rainfall

On average 70 mm (2.8 inches) of rain normally falls in Harrow during October with rain falling on 14 days of the month.

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Harrow weather in November

The average maximum daytime temperature in Harrow in November 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 2 hours of sunshine a day in Harrow during November.

  • 10°C maximum daytime temperature in November in Harrow10
    10°C max day temperature
  • 2 hours of sunshine per day in November in Harrow2
    2 hours of sunshine per day
  • 15 days with some rainfall in November in Harrow15
    15 days with some rainfall
  • 4°C minimum night-time temperature in November in Harrow4
    4°C min night temperature
  • 63 mm monthly rainfall in November in Harrow63
    63 mm of monthly rainfall

On average 63 mm (2.5 inches) of rain normally falls in Harrow during November with rain falling on 15 days of the month.

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Harrow weather in December

The average maximum daytime temperature in Harrow in December 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 2 hours of sunshine a day in Harrow during December.

  • 7°C maximum daytime temperature in December in Harrow7
    7°C max day temperature
  • 2 hours of sunshine per day in December in Harrow2
    2 hours of sunshine per day
  • 15 days with some rainfall in December in Harrow15
    15 days with some rainfall
  • 2°C minimum night-time temperature in December in Harrow2
    2°C min night temperature
  • 67 mm monthly rainfall in December in Harrow67
    67 mm of monthly rainfall

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

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