Otterham weather

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

• Otterham weather averages
• Otterham weather by month
• Back to Cornwall
• Back to England

Otterham weather averages

Check the Otterham 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 Otterham, Cornwall, England.

Back to top

Otterham weather by month

Check the weather for Otterham, 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

Back to top

Otterham weather in January

The average maximum daytime temperature in Otterham in January 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 2 hours of sunshine a day in Otterham during January.

• 8
  8°C max day temperature
• 2
  2 hours of sunshine per day
• 20
  20 days with some rainfall
• 3
  3°C min night temperature
• 180
  180 mm of monthly rainfall

On average 180 mm (7.1 inches) of rain normally falls in Otterham during January with rain falling on 20 days of the month.

Back to months

Otterham weather in February

The average maximum daytime temperature in Otterham 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 Otterham during February.

• 8
  8°C max day temperature
• 3
  3 hours of sunshine per day
• 17
  17 days with some rainfall
• 3
  3°C min night temperature
• 133
  133 mm of monthly rainfall

On average 133 mm (5.2 inches) of rain normally falls in Otterham during February with rain falling on 17 days of the month.

Back to months

Otterham weather in March

The average maximum daytime temperature in Otterham 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 Otterham during March.

• 10
  10°C max day temperature
• 4
  4 hours of sunshine per day
• 18
  18 days with some rainfall
• 4
  4°C min night temperature
• 125
  125 mm of monthly rainfall

On average 125 mm (4.9 inches) of rain normally falls in Otterham during March with rain falling on 18 days of the month.

Back to months

Otterham weather in April

The average maximum daytime temperature in Otterham 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 Otterham during April.

• 12
  12°C max day temperature
• 6
  6 hours of sunshine per day
• 15
  15 days with some rainfall
• 5
  5°C min night temperature
• 85
  85 mm of monthly rainfall

On average 85 mm (3.3 inches) of rain normally falls in Otterham during April with rain falling on 15 days of the month.

Back to months

Otterham weather in May

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

• 15
  15°C max day temperature
• 7
  7 hours of sunshine per day
• 15
  15 days with some rainfall
• 7
  7°C min night temperature
• 86
  86 mm of monthly rainfall

On average 86 mm (3.4 inches) of rain normally falls in Otterham during May with rain falling on 15 days of the month.

Back to months

Otterham weather in June

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

• 17
  17°C max day temperature
• 7
  7 hours of sunshine per day
• 13
  13 days with some rainfall
• 10
  10°C min night temperature
• 83
  83 mm of monthly rainfall

On average 83 mm (3.3 inches) of rain normally falls in Otterham during June with rain falling on 13 days of the month.

Back to months

Otterham weather in July

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

• 19
  19°C max day temperature
• 6
  6 hours of sunshine per day
• 13
  13 days with some rainfall
• 12
  12°C min night temperature
• 83
  83 mm of monthly rainfall

On average 83 mm (3.3 inches) of rain normally falls in Otterham during July with rain falling on 13 days of the month.

Back to months

Otterham weather in August

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

• 19
  19°C max day temperature
• 6
  6 hours of sunshine per day
• 14
  14 days with some rainfall
• 12
  12°C min night temperature
• 110
  110 mm of monthly rainfall

On average 110 mm (4.3 inches) of rain normally falls in Otterham during August with rain falling on 14 days of the month.

Back to months

Otterham weather in September

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

• 17
  17°C max day temperature
• 5
  5 hours of sunshine per day
• 16
  16 days with some rainfall
• 10
  10°C min night temperature
• 124
  124 mm of monthly rainfall

On average 124 mm (4.9 inches) of rain normally falls in Otterham during September with rain falling on 16 days of the month.

Back to months

Otterham weather in October

The average maximum daytime temperature in Otterham in October is a comfortable 14°C (57°F), while the average minimum night-time temperature is a cool 8°C (46°F). You can expect on average 3 hours of sunshine a day in Otterham during October.

• 14
  14°C max day temperature
• 3
  3 hours of sunshine per day
• 18
  18 days with some rainfall
• 8
  8°C min night temperature
• 158
  158 mm of monthly rainfall

On average 158 mm (6.2 inches) of rain normally falls in Otterham during October with rain falling on 18 days of the month.

Back to months

Otterham weather in November

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

• 11
  11°C max day temperature
• 2
  2 hours of sunshine per day
• 19
  19 days with some rainfall
• 6
  6°C min night temperature
• 168
  168 mm of monthly rainfall

On average 168 mm (6.6 inches) of rain normally falls in Otterham during November with rain falling on 19 days of the month.

Back to months

Otterham weather in December

The average maximum daytime temperature in Otterham 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 Otterham during December.

• 9
  9°C max day temperature
• 2
  2 hours of sunshine per day
• 20
  20 days with some rainfall
• 4
  4°C min night temperature
• 188
  188 mm of monthly rainfall

On average 188 mm (7.4 inches) of rain normally falls in Otterham during December with rain falling on 20 days of the month.

Back to months