Hertfordshire weather by month

Check out Hertfordshire weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum daytime temperature °C
7°C maximum daytime temperature in January in Watford7
7°C maximum daytime temperature in February in Watford7
10°C maximum daytime temperature in March in Watford10
13°C maximum daytime temperature in April in Watford13
17°C maximum daytime temperature in May in Watford17
20°C maximum daytime temperature in June in Watford20
22°C maximum daytime temperature in July in Watford22
22°C maximum daytime temperature in August in Watford22
19°C maximum daytime temperature in September in Watford19
15°C maximum daytime temperature in October in Watford15
10°C maximum daytime temperature in November in Watford10
7°C maximum daytime temperature in December in Watford7
Hours of sunshine (daily)
Days with some rainfall
17 days with some rainfall in January in Watford17
13 days with some rainfall in February in Watford13
15 days with some rainfall in March in Watford15
14 days with some rainfall in April in Watford14
14 days with some rainfall in May in Watford14
12 days with some rainfall in June in Watford12
11 days with some rainfall in July in Watford11
12 days with some rainfall in August in Watford12
12 days with some rainfall in September in Watford12
14 days with some rainfall in October in Watford14
16 days with some rainfall in November in Watford16
15 days with some rainfall in December in Watford15

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Hertfordshire by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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The climate guide for Hertfordshire (Watford) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

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Metric (°C / mm)  |  Imperial (°F / inches)

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Hertfordshire weather averages

Temperature in Hertfordshire (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
7°C maximum daytime temperature in January in Hertfordshire (Watford)7
7°C maximum daytime temperature in February in Hertfordshire (Watford)7
10°C maximum daytime temperature in March in Hertfordshire (Watford)10
13°C maximum daytime temperature in April in Hertfordshire (Watford)13
17°C maximum daytime temperature in May in Hertfordshire (Watford)17
20°C maximum daytime temperature in June in Hertfordshire (Watford)20
22°C maximum daytime temperature in July in Hertfordshire (Watford)22
22°C maximum daytime temperature in August in Hertfordshire (Watford)22
19°C maximum daytime temperature in September in Hertfordshire (Watford)19
15°C maximum daytime temperature in October in Hertfordshire (Watford)15
10°C maximum daytime temperature in November in Hertfordshire (Watford)10
7°C maximum daytime temperature in December in Hertfordshire (Watford)7
Min temperature (night-time)
1°C minimum night-time temperature in January in Hertfordshire (Watford)1
1°C minimum night-time temperature in February in Hertfordshire (Watford)1
2°C minimum night-time temperature in March in Hertfordshire (Watford)2
4°C minimum night-time temperature in April in Hertfordshire (Watford)4
7°C minimum night-time temperature in May in Hertfordshire (Watford)7
10°C minimum night-time temperature in June in Hertfordshire (Watford)10
12°C minimum night-time temperature in July in Hertfordshire (Watford)12
12°C minimum night-time temperature in August in Hertfordshire (Watford)12
10°C minimum night-time temperature in September in Hertfordshire (Watford)10
7°C minimum night-time temperature in October in Hertfordshire (Watford)7
4°C minimum night-time temperature in November in Hertfordshire (Watford)4
2°C minimum night-time temperature in December in Hertfordshire (Watford)2
Heat & Humidity
No heat & humidity in January in Hertfordshire (Watford)0
No heat & humidity in February in Hertfordshire (Watford)0
No heat & humidity in March in Hertfordshire (Watford)0
No heat & humidity in April in Hertfordshire (Watford)0
No heat & humidity in May in Hertfordshire (Watford)0
No heat & humidity in June in Hertfordshire (Watford)0
No heat & humidity in July in Hertfordshire (Watford)0
No heat & humidity in August in Hertfordshire (Watford)0
No heat & humidity in September in Hertfordshire (Watford)0
No heat & humidity in October in Hertfordshire (Watford)0
No heat & humidity in November in Hertfordshire (Watford)0
No heat & humidity in December in Hertfordshire (Watford)0

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

Sunshine & UV index in Hertfordshire

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
8 hours of daylight per day in January in Hertfordshire (Watford)8
10 hours of daylight per day in February in Hertfordshire (Watford)10
12 hours of daylight per day in March in Hertfordshire (Watford)12
14 hours of daylight per day in April in Hertfordshire (Watford)14
16 hours of daylight per day in May in Hertfordshire (Watford)16
17 hours of daylight per day in June in Hertfordshire (Watford)17
16 hours of daylight per day in July in Hertfordshire (Watford)16
15 hours of daylight per day in August in Hertfordshire (Watford)15
13 hours of daylight per day in September in Hertfordshire (Watford)13
11 hours of daylight per day in October in Hertfordshire (Watford)11
9 hours of daylight per day in November in Hertfordshire (Watford)9
8 hours of daylight per day in December in Hertfordshire (Watford)8
UV Index (Maximum)
UV (maximum) index 1 (Low) in January in Hertfordshire (Watford)1
UV (maximum) index 1 (Low) in February in Hertfordshire (Watford)1
UV (maximum) index 2 (Low) in March in Hertfordshire (Watford)2
UV (maximum) index 4 (Moderate) in April in Hertfordshire (Watford)4
UV (maximum) index 5 (Moderate) in May in Hertfordshire (Watford)5
UV (maximum) index 6 (High) in June in Hertfordshire (Watford)6
UV (maximum) index 6 (High) in July in Hertfordshire (Watford)6
UV (maximum) index 5 (Moderate) in August in Hertfordshire (Watford)5
UV (maximum) index 4 (Moderate) in September in Hertfordshire (Watford)4
UV (maximum) index 2 (Low) in October in Hertfordshire (Watford)2
UV (maximum) index 1 (Low) in November in Hertfordshire (Watford)1
No UV (maximum) index in December in Hertfordshire (Watford)0

Rainfall in Hertfordshire

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
17 days with some rainfall in January in Hertfordshire (Watford)17
13 days with some rainfall in February in Hertfordshire (Watford)13
15 days with some rainfall in March in Hertfordshire (Watford)15
14 days with some rainfall in April in Hertfordshire (Watford)14
14 days with some rainfall in May in Hertfordshire (Watford)14
12 days with some rainfall in June in Hertfordshire (Watford)12
11 days with some rainfall in July in Hertfordshire (Watford)11
12 days with some rainfall in August in Hertfordshire (Watford)12
12 days with some rainfall in September in Hertfordshire (Watford)12
14 days with some rainfall in October in Hertfordshire (Watford)14
16 days with some rainfall in November in Hertfordshire (Watford)16
15 days with some rainfall in December in Hertfordshire (Watford)15
Average monthly rainfall (mm)
60 mm monthly rainfall in January in Hertfordshire (Watford)60
41 mm monthly rainfall in February in Hertfordshire (Watford)41
54 mm monthly rainfall in March in Hertfordshire (Watford)54
50 mm monthly rainfall in April in Hertfordshire (Watford)50
56 mm monthly rainfall in May in Hertfordshire (Watford)56
55 mm monthly rainfall in June in Hertfordshire (Watford)55
49 mm monthly rainfall in July in Hertfordshire (Watford)49
56 mm monthly rainfall in August in Hertfordshire (Watford)56
55 mm monthly rainfall in September in Hertfordshire (Watford)55
63 mm monthly rainfall in October in Hertfordshire (Watford)63
63 mm monthly rainfall in November in Hertfordshire (Watford)63
64 mm monthly rainfall in December in Hertfordshire (Watford)64

Compare Hertfordshire weather with the UK

The weather chart below compares the average monthly maximum daytime temperature for Hertfordshire, England (Watford) and the UK (London).

Maximum daytime temperature (°C)

Hertfordshire, England (Watford)
UK (London)
7
7
7
7
10
10
13
13
17
17
20
20
22
22
22
22
19
19
15
15
10
10
7
8
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C / mm)  |  Imperial (°F / inches)

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