Hartwell weather
The Hartwell weather guide shows monthly weather averages (including daytime and night-time temperatures, rainfall and hours of sunshine) for holidays in Hartwell, Northamptonshire, England in 2026/2027.
Hartwell weather averages
Check the Hartwell 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 Hartwell, Northamptonshire, England.
Hartwell weather by month
Check the weather for Hartwell, Northamptonshire, 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.
Hartwell weather in January
The average maximum daytime temperature in Hartwell in January is a cold 6°C (43°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 Hartwell during January.
- 6°C max day temperature
6 - 2 hours of sunshine per day
2 - 17 days with some rainfall
17 - 1°C min night temperature
1 - 55 mm of monthly rainfall
55
On average 55 mm (2.2 inches) of rain normally falls in Hartwell during January with rain falling on 17 days of the month.
Hartwell weather in February
The average maximum daytime temperature in Hartwell 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 Hartwell during February.
- 7°C max day temperature7
- 2 hours of sunshine per day2
- 14 days with some rainfall
14 - 1°C min night temperature1
- 38 mm of monthly rainfall
38
On average 38 mm (1.5 inches) of rain normally falls in Hartwell during February with rain falling on 14 days of the month.
Hartwell weather in March
The average maximum daytime temperature in Hartwell in March is a cool 10°C (50°F), while the average minimum night-time temperature is a cold 2°C (36°F). You can expect on average 3 hours of sunshine a day in Hartwell during March.
- 10°C max day temperature
10 - 3 hours of sunshine per day
3 - 15 days with some rainfall15
- 2°C min night temperature2
- 46 mm of monthly rainfall46
On average 46 mm (1.8 inches) of rain normally falls in Hartwell during March with rain falling on 15 days of the month.
Hartwell weather in April
The average maximum daytime temperature in Hartwell in April is a cool 12°C (54°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 Hartwell during April.
- 12°C max day temperature
12 - 4 hours of sunshine per day
4 - 14 days with some rainfall14
- 3°C min night temperature3
- 47 mm of monthly rainfall47
On average 47 mm (1.9 inches) of rain normally falls in Hartwell during April with rain falling on 14 days of the month.
Hartwell weather in May
The average maximum daytime temperature in Hartwell in May is a comfortable 16°C (61°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 Hartwell during May.
- 16°C max day temperature
16 - 6 hours of sunshine per day
6 - 13 days with some rainfall13
- 6°C min night temperature6
- 50 mm of monthly rainfall50
On average 50 mm (2 inches) of rain normally falls in Hartwell during May with rain falling on 13 days of the month.
Hartwell weather in June
The average maximum daytime temperature in Hartwell in June is a comfortable 19°C (66°F), while the average minimum night-time temperature is a cool 9°C (48°F). You can expect on average 6 hours of sunshine a day in Hartwell during June.
- 19°C max day temperature
19 - 6 hours of sunshine per day6
- 12 days with some rainfall
12 - 9°C min night temperature9
- 56 mm of monthly rainfall56
On average 56 mm (2.2 inches) of rain normally falls in Hartwell during June with rain falling on 12 days of the month.
Hartwell weather in July
The average maximum daytime temperature in Hartwell in July is a warm 22°C (72°F), while the average minimum night-time temperature is a cool 11°C (52°F). You can expect on average 6 hours of sunshine a day in Hartwell during July.
- 22°C max day temperature
22 - 6 hours of sunshine per day6
- 11 days with some rainfall11
- 11°C min night temperature11
- 44 mm of monthly rainfall44
On average 44 mm (1.7 inches) of rain normally falls in Hartwell during July with rain falling on 11 days of the month.
Hartwell weather in August
The average maximum daytime temperature in Hartwell in August is a warm 22°C (72°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 Hartwell during August.
- 22°C max day temperature22
- 5 hours of sunshine per day
5 - 12 days with some rainfall12
- 11°C min night temperature11
- 56 mm of monthly rainfall56
On average 56 mm (2.2 inches) of rain normally falls in Hartwell during August with rain falling on 12 days of the month.
Hartwell weather in September
The average maximum daytime temperature in Hartwell in September is a comfortable 18°C (64°F), while the average minimum night-time temperature is a cool 9°C (48°F). You can expect on average 5 hours of sunshine a day in Hartwell during September.
- 18°C max day temperature18
- 5 hours of sunshine per day5
- 12 days with some rainfall12
- 9°C min night temperature9
- 50 mm of monthly rainfall50
On average 50 mm (2 inches) of rain normally falls in Hartwell during September with rain falling on 12 days of the month.
Hartwell weather in October
The average maximum daytime temperature in Hartwell in October is a comfortable 14°C (57°F), while the average minimum night-time temperature is a cold 6°C (43°F). You can expect on average 3 hours of sunshine a day in Hartwell during October.
- 14°C max day temperature14
- 3 hours of sunshine per day3
- 14 days with some rainfall14
- 6°C min night temperature6
- 57 mm of monthly rainfall57
On average 57 mm (2.2 inches) of rain normally falls in Hartwell during October with rain falling on 14 days of the month.
Hartwell weather in November
The average maximum daytime temperature in Hartwell in November 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 2 hours of sunshine a day in Hartwell during November.
- 10°C max day temperature10
- 2 hours of sunshine per day2
- 15 days with some rainfall15
- 3°C min night temperature3
- 52 mm of monthly rainfall52
On average 52 mm (2 inches) of rain normally falls in Hartwell during November with rain falling on 15 days of the month.
Hartwell weather in December
The average maximum daytime temperature in Hartwell 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 1 hours of sunshine a day in Hartwell during December.
- 7°C max day temperature7
- 1 hour of sunshine per day
1 - 15 days with some rainfall15
- 2°C min night temperature2
- 60 mm of monthly rainfall60
On average 60 mm (2.4 inches) of rain normally falls in Hartwell during December with rain falling on 15 days of the month.