Mullion weather

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

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• Mullion weather by month
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Mullion weather averages

Check the Mullion 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 Mullion, Cornwall, England.

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Mullion weather by month

Check the weather for Mullion, Cornwall, 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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Mullion weather in January

The average maximum daytime temperature in Mullion in January 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 Mullion during January.

• 9
  9°C max day temperature
• 2
  2 hours of sunshine per day
• 21
  21 days with some rainfall
• 4
  4°C min night temperature
• 138
  138 mm of monthly rainfall

On average 138 mm (5.4 inches) of rain normally falls in Mullion during January with rain falling on 21 days of the month.

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Mullion weather in February

The average maximum daytime temperature in Mullion in February 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 3 hours of sunshine a day in Mullion during February.

• 9
  9°C max day temperature
• 3
  3 hours of sunshine per day
• 17
  17 days with some rainfall
• 4
  4°C min night temperature
• 106
  106 mm of monthly rainfall

On average 106 mm (4.2 inches) of rain normally falls in Mullion during February with rain falling on 17 days of the month.

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Mullion weather in March

The average maximum daytime temperature in Mullion in March is a cool 10°C (50°F), while the average minimum night-time temperature is a cold 5°C (41°F). You can expect on average 4 hours of sunshine a day in Mullion during March.

• 10
  10°C max day temperature
• 4
  4 hours of sunshine per day
• 17
  17 days with some rainfall
• 5
  5°C min night temperature
• 93
  93 mm of monthly rainfall

On average 93 mm (3.7 inches) of rain normally falls in Mullion during March with rain falling on 17 days of the month.

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Mullion weather in April

The average maximum daytime temperature in Mullion in April is a cool 12°C (54°F), while the average minimum night-time temperature is a cold 6°C (43°F). You can expect on average 6 hours of sunshine a day in Mullion during April.

• 12
  12°C max day temperature
• 6
  6 hours of sunshine per day
• 14
  14 days with some rainfall
• 6
  6°C min night temperature
• 68
  68 mm of monthly rainfall

On average 68 mm (2.7 inches) of rain normally falls in Mullion during April with rain falling on 14 days of the month.

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Mullion weather in May

The average maximum daytime temperature in Mullion 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 Mullion during May.

• 15
  15°C max day temperature
• 7
  7 hours of sunshine per day
• 13
  13 days with some rainfall
• 8
  8°C min night temperature
• 64
  64 mm of monthly rainfall

On average 64 mm (2.5 inches) of rain normally falls in Mullion during May with rain falling on 13 days of the month.

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Mullion weather in June

The average maximum daytime temperature in Mullion in June is a comfortable 17°C (63°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 Mullion during June.

• 17
  17°C max day temperature
• 7
  7 hours of sunshine per day
• 12
  12 days with some rainfall
• 11
  11°C min night temperature
• 67
  67 mm of monthly rainfall

On average 67 mm (2.6 inches) of rain normally falls in Mullion during June with rain falling on 12 days of the month.

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Mullion weather in July

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

• 19
  19°C max day temperature
• 7
  7 hours of sunshine per day
• 12
  12 days with some rainfall
• 13
  13°C min night temperature
• 60
  60 mm of monthly rainfall

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

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Mullion weather in August

The average maximum daytime temperature in Mullion in August is a comfortable 19°C (66°F), while the average minimum night-time temperature is a cool 13°C (55°F). You can expect on average 6 hours of sunshine a day in Mullion during August.

• 19
  19°C max day temperature
• 6
  6 hours of sunshine per day
• 14
  14 days with some rainfall
• 13
  13°C min night temperature
• 79
  79 mm of monthly rainfall

On average 79 mm (3.1 inches) of rain normally falls in Mullion during August with rain falling on 14 days of the month.

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Mullion weather in September

The average maximum daytime temperature in Mullion in September is a comfortable 17°C (63°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 Mullion during September.

• 17
  17°C max day temperature
• 5
  5 hours of sunshine per day
• 15
  15 days with some rainfall
• 11
  11°C min night temperature
• 88
  88 mm of monthly rainfall

On average 88 mm (3.5 inches) of rain normally falls in Mullion during September with rain falling on 15 days of the month.

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Mullion weather in October

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

• 14
  14°C max day temperature
• 3
  3 hours of sunshine per day
• 18
  18 days with some rainfall
• 9
  9°C min night temperature
• 119
  119 mm of monthly rainfall

On average 119 mm (4.7 inches) of rain normally falls in Mullion during October with rain falling on 18 days of the month.

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Mullion weather in November

The average maximum daytime temperature in Mullion in November is a cool 11°C (52°F), while the average minimum night-time temperature is a cold 7°C (45°F). You can expect on average 2 hours of sunshine a day in Mullion during November.

• 11
  11°C max day temperature
• 2
  2 hours of sunshine per day
• 20
  20 days with some rainfall
• 7
  7°C min night temperature
• 136
  136 mm of monthly rainfall

On average 136 mm (5.4 inches) of rain normally falls in Mullion during November with rain falling on 20 days of the month.

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Mullion weather in December

The average maximum daytime temperature in Mullion in December is a cool 10°C (50°F), while the average minimum night-time temperature is a cold 6°C (43°F). You can expect on average 2 hours of sunshine a day in Mullion during December.

• 10
  10°C max day temperature
• 2
  2 hours of sunshine per day
• 21
  21 days with some rainfall
• 6
  6°C min night temperature
• 143
  143 mm of monthly rainfall

On average 143 mm (5.6 inches) of rain normally falls in Mullion during December with rain falling on 21 days of the month.

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