Merton weather
The Merton weather guide shows monthly weather averages (including daytime and night-time temperatures, rainfall and hours of sunshine) for holidays in Merton, Devon, England in 2026/2027.
Merton weather averages
Check the Merton 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 Merton, Devon, England.
Merton weather by month
Check the weather for Merton, Devon, 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.
Merton weather in January
The average maximum daytime temperature in Merton 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 Merton during January.
- 8°C max day temperature
8 - 2 hours of sunshine per day
2 - 20 days with some rainfall
20 - 3°C min night temperature
3 - 159 mm of monthly rainfall
159
On average 159 mm (6.3 inches) of rain normally falls in Merton during January with rain falling on 20 days of the month.
Merton weather in February
The average maximum daytime temperature in Merton 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 Merton during February.
- 8°C max day temperature8
- 3 hours of sunshine per day
3 - 17 days with some rainfall
17 - 3°C min night temperature3
- 114 mm of monthly rainfall
114
On average 114 mm (4.5 inches) of rain normally falls in Merton during February with rain falling on 17 days of the month.
Merton weather in March
The average maximum daytime temperature in Merton 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 Merton during March.
- 9°C max day temperature9
- 4 hours of sunshine per day
4 - 18 days with some rainfall18
- 4°C min night temperature
4 - 107 mm of monthly rainfall107
On average 107 mm (4.2 inches) of rain normally falls in Merton during March with rain falling on 18 days of the month.
Merton weather in April
The average maximum daytime temperature in Merton 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 Merton during April.
- 12°C max day temperature
12 - 6 hours of sunshine per day
6 - 14 days with some rainfall
14 - 5°C min night temperature5
- 77 mm of monthly rainfall
77
On average 77 mm (3 inches) of rain normally falls in Merton during April with rain falling on 14 days of the month.
Merton weather in May
The average maximum daytime temperature in Merton 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 Merton during May.
- 15°C max day temperature
15 - 7 hours of sunshine per day
7 - 13 days with some rainfall13
- 7°C min night temperature7
- 75 mm of monthly rainfall75
On average 75 mm (3 inches) of rain normally falls in Merton during May with rain falling on 13 days of the month.
Merton weather in June
The average maximum daytime temperature in Merton 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 Merton during June.
- 17°C max day temperature17
- 7 hours of sunshine per day7
- 13 days with some rainfall13
- 10°C min night temperature10
- 84 mm of monthly rainfall
84
On average 84 mm (3.3 inches) of rain normally falls in Merton during June with rain falling on 13 days of the month.
Merton weather in July
The average maximum daytime temperature in Merton 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 7 hours of sunshine a day in Merton during July.
- 19°C max day temperature
19 - 7 hours of sunshine per day7
- 13 days with some rainfall13
- 12°C min night temperature12
- 77 mm of monthly rainfall77
On average 77 mm (3 inches) of rain normally falls in Merton during July with rain falling on 13 days of the month.
Merton weather in August
The average maximum daytime temperature in Merton 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 Merton during August.
- 19°C max day temperature19
- 6 hours of sunshine per day6
- 14 days with some rainfall14
- 12°C min night temperature12
- 99 mm of monthly rainfall99
On average 99 mm (3.9 inches) of rain normally falls in Merton during August with rain falling on 14 days of the month.
Merton weather in September
The average maximum daytime temperature in Merton 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 Merton during September.
- 17°C max day temperature17
- 5 hours of sunshine per day
5 - 15 days with some rainfall15
- 10°C min night temperature10
- 109 mm of monthly rainfall109
On average 109 mm (4.3 inches) of rain normally falls in Merton during September with rain falling on 15 days of the month.
Merton weather in October
The average maximum daytime temperature in Merton 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 Merton during October.
- 14°C max day temperature14
- 3 hours of sunshine per day3
- 18 days with some rainfall18
- 8°C min night temperature8
- 140 mm of monthly rainfall
140
On average 140 mm (5.5 inches) of rain normally falls in Merton during October with rain falling on 18 days of the month.
Merton weather in November
The average maximum daytime temperature in Merton in November is a cool 11°C (52°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 Merton during November.
- 11°C max day temperature11
- 2 hours of sunshine per day2
- 19 days with some rainfall19
- 5°C min night temperature5
- 151 mm of monthly rainfall151
On average 151 mm (5.9 inches) of rain normally falls in Merton during November with rain falling on 19 days of the month.
Merton weather in December
The average maximum daytime temperature in Merton 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 Merton during December.
- 9°C max day temperature9
- 2 hours of sunshine per day2
- 20 days with some rainfall20
- 4°C min night temperature4
- 168 mm of monthly rainfall
168
On average 168 mm (6.6 inches) of rain normally falls in Merton during December with rain falling on 20 days of the month.