Saint Dennis weather
The Saint Dennis weather guide shows monthly weather averages (including daytime and night-time temperatures, rainfall and hours of sunshine) for holidays in Saint Dennis, Cornwall, England in 2026/2027.
Saint Dennis weather averages
Check the Saint Dennis 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 Saint Dennis, Cornwall, England.
Saint Dennis weather by month
Check the weather for Saint Dennis, 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.
Saint Dennis weather in January
The average maximum daytime temperature in Saint Dennis 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 Saint Dennis during January.
- 9°C max day temperature
9 - 2 hours of sunshine per day
2 - 20 days with some rainfall
20 - 4°C min night temperature
4 - 141 mm of monthly rainfall
141
On average 141 mm (5.6 inches) of rain normally falls in Saint Dennis during January with rain falling on 20 days of the month.
Saint Dennis weather in February
The average maximum daytime temperature in Saint Dennis 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 Saint Dennis during February.
- 9°C max day temperature9
- 3 hours of sunshine per day
3 - 17 days with some rainfall
17 - 4°C min night temperature4
- 103 mm of monthly rainfall
103
On average 103 mm (4.1 inches) of rain normally falls in Saint Dennis during February with rain falling on 17 days of the month.
Saint Dennis weather in March
The average maximum daytime temperature in Saint Dennis 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 Saint Dennis during March.
- 10°C max day temperature10
- 4 hours of sunshine per day
4 - 17 days with some rainfall17
- 5°C min night temperature5
- 96 mm of monthly rainfall
96
On average 96 mm (3.8 inches) of rain normally falls in Saint Dennis during March with rain falling on 17 days of the month.
Saint Dennis weather in April
The average maximum daytime temperature in Saint Dennis 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 Saint Dennis during April.
- 12°C max day temperature
12 - 6 hours of sunshine per day
6 - 13 days with some rainfall
13 - 6°C min night temperature6
- 67 mm of monthly rainfall
67
On average 67 mm (2.6 inches) of rain normally falls in Saint Dennis during April with rain falling on 13 days of the month.
Saint Dennis weather in May
The average maximum daytime temperature in Saint Dennis 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 Saint Dennis during May.
- 15°C max day temperature
15 - 7 hours of sunshine per day
7 - 13 days with some rainfall13
- 8°C min night temperature8
- 67 mm of monthly rainfall67
On average 67 mm (2.6 inches) of rain normally falls in Saint Dennis during May with rain falling on 13 days of the month.
Saint Dennis weather in June
The average maximum daytime temperature in Saint Dennis 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 Saint Dennis during June.
- 17°C max day temperature17
- 7 hours of sunshine per day7
- 12 days with some rainfall
12 - 11°C min night temperature11
- 71 mm of monthly rainfall71
On average 71 mm (2.8 inches) of rain normally falls in Saint Dennis during June with rain falling on 12 days of the month.
Saint Dennis weather in July
The average maximum daytime temperature in Saint Dennis 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 Saint Dennis during July.
- 20°C max day temperature
20 - 7 hours of sunshine per day7
- 12 days with some rainfall12
- 13°C min night temperature13
- 66 mm of monthly rainfall66
On average 66 mm (2.6 inches) of rain normally falls in Saint Dennis during July with rain falling on 12 days of the month.
Saint Dennis weather in August
The average maximum daytime temperature in Saint Dennis in August 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 6 hours of sunshine a day in Saint Dennis during August.
- 20°C max day temperature20
- 6 hours of sunshine per day6
- 13 days with some rainfall13
- 13°C min night temperature13
- 85 mm of monthly rainfall85
On average 85 mm (3.3 inches) of rain normally falls in Saint Dennis during August with rain falling on 13 days of the month.
Saint Dennis weather in September
The average maximum daytime temperature in Saint Dennis 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 Saint Dennis during September.
- 17°C max day temperature17
- 5 hours of sunshine per day
5 - 15 days with some rainfall15
- 11°C min night temperature11
- 94 mm of monthly rainfall94
On average 94 mm (3.7 inches) of rain normally falls in Saint Dennis during September with rain falling on 15 days of the month.
Saint Dennis weather in October
The average maximum daytime temperature in Saint Dennis 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 Saint Dennis during October.
- 14°C max day temperature14
- 3 hours of sunshine per day3
- 18 days with some rainfall18
- 9°C min night temperature9
- 121 mm of monthly rainfall
121
On average 121 mm (4.8 inches) of rain normally falls in Saint Dennis during October with rain falling on 18 days of the month.
Saint Dennis weather in November
The average maximum daytime temperature in Saint Dennis 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 Saint Dennis during November.
- 11°C max day temperature11
- 2 hours of sunshine per day2
- 19 days with some rainfall19
- 6°C min night temperature6
- 134 mm of monthly rainfall134
On average 134 mm (5.3 inches) of rain normally falls in Saint Dennis during November with rain falling on 19 days of the month.
Saint Dennis weather in December
The average maximum daytime temperature in Saint Dennis in December 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 2 hours of sunshine a day in Saint Dennis during December.
- 10°C max day temperature10
- 2 hours of sunshine per day2
- 20 days with some rainfall20
- 5°C min night temperature5
- 144 mm of monthly rainfall144
On average 144 mm (5.7 inches) of rain normally falls in Saint Dennis during December with rain falling on 20 days of the month.