Harpenden weather
The Harpenden weather guide shows monthly weather averages (including daytime and night-time temperatures, rainfall and hours of sunshine) for holidays in Harpenden, Hertfordshire, England in 2026/2027.
Harpenden weather averages
Check the Harpenden 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 Harpenden, Hertfordshire, England.
Harpenden weather by month
Check the weather for Harpenden, Hertfordshire, 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.
Harpenden weather in January
The average maximum daytime temperature in Harpenden in January 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 Harpenden during January.
- 7°C max day temperature
7 - 2 hours of sunshine per day
2 - 17 days with some rainfall
17 - 1°C min night temperature
1 - 65 mm of monthly rainfall
65
On average 65 mm (2.6 inches) of rain normally falls in Harpenden during January with rain falling on 17 days of the month.
Harpenden weather in February
The average maximum daytime temperature in Harpenden 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 Harpenden during February.
- 7°C max day temperature7
- 2 hours of sunshine per day2
- 13 days with some rainfall
13 - 1°C min night temperature1
- 43 mm of monthly rainfall
43
On average 43 mm (1.7 inches) of rain normally falls in Harpenden during February with rain falling on 13 days of the month.
Harpenden weather in March
The average maximum daytime temperature in Harpenden in March 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 4 hours of sunshine a day in Harpenden during March.
- 10°C max day temperature
10 - 4 hours of sunshine per day
4 - 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 Harpenden during March with rain falling on 15 days of the month.
Harpenden weather in April
The average maximum daytime temperature in Harpenden in April is a cool 12°C (54°F), while the average minimum night-time temperature is a cold 4°C (39°F). You can expect on average 5 hours of sunshine a day in Harpenden during April.
- 12°C max day temperature
12 - 5 hours of sunshine per day
5 - 13 days with some rainfall13
- 4°C min night temperature4
- 51 mm of monthly rainfall51
On average 51 mm (2 inches) of rain normally falls in Harpenden during April with rain falling on 13 days of the month.
Harpenden weather in May
The average maximum daytime temperature in Harpenden in May is a comfortable 16°C (61°F), while the average minimum night-time temperature is a cold 7°C (45°F). You can expect on average 6 hours of sunshine a day in Harpenden during May.
- 16°C max day temperature
16 - 6 hours of sunshine per day
6 - 13 days with some rainfall13
- 7°C min night temperature7
- 50 mm of monthly rainfall50
On average 50 mm (2 inches) of rain normally falls in Harpenden during May with rain falling on 13 days of the month.
Harpenden weather in June
The average maximum daytime temperature in Harpenden in June is a comfortable 19°C (66°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 Harpenden during June.
- 19°C max day temperature
19 - 7 hours of sunshine per day
7 - 12 days with some rainfall
12 - 10°C min night temperature10
- 60 mm of monthly rainfall60
On average 60 mm (2.4 inches) of rain normally falls in Harpenden during June with rain falling on 12 days of the month.
Harpenden weather in July
The average maximum daytime temperature in Harpenden in July is a warm 22°C (72°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 Harpenden during July.
- 22°C max day temperature
22 - 6 hours of sunshine per day6
- 11 days with some rainfall11
- 12°C min night temperature12
- 44 mm of monthly rainfall44
On average 44 mm (1.7 inches) of rain normally falls in Harpenden during July with rain falling on 11 days of the month.
Harpenden weather in August
The average maximum daytime temperature in Harpenden in August is a warm 22°C (72°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 Harpenden during August.
- 22°C max day temperature22
- 6 hours of sunshine per day6
- 11 days with some rainfall11
- 12°C min night temperature12
- 52 mm of monthly rainfall52
On average 52 mm (2 inches) of rain normally falls in Harpenden during August with rain falling on 11 days of the month.
Harpenden weather in September
The average maximum daytime temperature in Harpenden in September is a comfortable 18°C (64°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 Harpenden during September.
- 18°C max day temperature18
- 5 hours of sunshine per day5
- 12 days with some rainfall12
- 10°C min night temperature10
- 62 mm of monthly rainfall62
On average 62 mm (2.4 inches) of rain normally falls in Harpenden during September with rain falling on 12 days of the month.
Harpenden weather in October
The average maximum daytime temperature in Harpenden in October is a comfortable 14°C (57°F), while the average minimum night-time temperature is a cold 7°C (45°F). You can expect on average 3 hours of sunshine a day in Harpenden during October.
- 14°C max day temperature14
- 3 hours of sunshine per day
3 - 14 days with some rainfall14
- 7°C min night temperature7
- 70 mm of monthly rainfall70
On average 70 mm (2.8 inches) of rain normally falls in Harpenden during October with rain falling on 14 days of the month.
Harpenden weather in November
The average maximum daytime temperature in Harpenden in November 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 2 hours of sunshine a day in Harpenden during November.
- 10°C max day temperature10
- 2 hours of sunshine per day2
- 15 days with some rainfall15
- 4°C min night temperature4
- 63 mm of monthly rainfall63
On average 63 mm (2.5 inches) of rain normally falls in Harpenden during November with rain falling on 15 days of the month.
Harpenden weather in December
The average maximum daytime temperature in Harpenden 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 2 hours of sunshine a day in Harpenden during December.
- 7°C max day temperature7
- 2 hours of sunshine per day2
- 15 days with some rainfall15
- 2°C min night temperature2
- 67 mm of monthly rainfall67
On average 67 mm (2.6 inches) of rain normally falls in Harpenden during December with rain falling on 15 days of the month.