Jersey climate guide

Temperature in Jersey (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
8°C maximum daytime temperature in January in Jersey (St Helier)8
8°C maximum daytime temperature in February in Jersey (St Helier)8
10°C maximum daytime temperature in March in Jersey (St Helier)10
12°C maximum daytime temperature in April in Jersey (St Helier)12
16°C maximum daytime temperature in May in Jersey (St Helier)16
18°C maximum daytime temperature in June in Jersey (St Helier)18
20°C maximum daytime temperature in July in Jersey (St Helier)20
20°C maximum daytime temperature in August in Jersey (St Helier)20
19°C maximum daytime temperature in September in Jersey (St Helier)19
16°C maximum daytime temperature in October in Jersey (St Helier)16
12°C maximum daytime temperature in November in Jersey (St Helier)12
9°C maximum daytime temperature in December in Jersey (St Helier)9
Min temperature (night-time)
4°C minimum night-time temperature in January in Jersey (St Helier)4
4°C minimum night-time temperature in February in Jersey (St Helier)4
5°C minimum night-time temperature in March in Jersey (St Helier)5
6°C minimum night-time temperature in April in Jersey (St Helier)6
9°C minimum night-time temperature in May in Jersey (St Helier)9
12°C minimum night-time temperature in June in Jersey (St Helier)12
14°C minimum night-time temperature in July in Jersey (St Helier)14
14°C minimum night-time temperature in August in Jersey (St Helier)14
13°C minimum night-time temperature in September in Jersey (St Helier)13
11°C minimum night-time temperature in October in Jersey (St Helier)11
7°C minimum night-time temperature in November in Jersey (St Helier)7
5°C minimum night-time temperature in December in Jersey (St Helier)5
Sea temperature
9°C sea temperature in January in Jersey (St Helier)9
8°C sea temperature in February in Jersey (St Helier)8
8°C sea temperature in March in Jersey (St Helier)8
10°C sea temperature in April in Jersey (St Helier)10
12°C sea temperature in May in Jersey (St Helier)12
14°C sea temperature in June in Jersey (St Helier)14
17°C sea temperature in July in Jersey (St Helier)17
18°C sea temperature in August in Jersey (St Helier)18
17°C sea temperature in September in Jersey (St Helier)17
16°C sea temperature in October in Jersey (St Helier)16
13°C sea temperature in November in Jersey (St Helier)13
11°C sea temperature in December in Jersey (St Helier)11

Sunshine & Daylight in Jersey

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
9 hours of daylight per day in January in Jersey (St Helier)9
10 hours of daylight per day in February in Jersey (St Helier)10
12 hours of daylight per day in March in Jersey (St Helier)12
14 hours of daylight per day in April in Jersey (St Helier)14
15 hours of daylight per day in May in Jersey (St Helier)15
16 hours of daylight per day in June in Jersey (St Helier)16
16 hours of daylight per day in July in Jersey (St Helier)16
14 hours of daylight per day in August in Jersey (St Helier)14
13 hours of daylight per day in September in Jersey (St Helier)13
11 hours of daylight per day in October in Jersey (St Helier)11
9 hours of daylight per day in November in Jersey (St Helier)9
8 hours of daylight per day in December in Jersey (St Helier)8

Rainfall in Jersey

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
20 days with some rainfall in January in Jersey (St Helier)20
16 days with some rainfall in February in Jersey (St Helier)16
16 days with some rainfall in March in Jersey (St Helier)16
14 days with some rainfall in April in Jersey (St Helier)14
13 days with some rainfall in May in Jersey (St Helier)13
11 days with some rainfall in June in Jersey (St Helier)11
10 days with some rainfall in July in Jersey (St Helier)10
11 days with some rainfall in August in Jersey (St Helier)11
13 days with some rainfall in September in Jersey (St Helier)13
15 days with some rainfall in October in Jersey (St Helier)15
19 days with some rainfall in November in Jersey (St Helier)19
19 days with some rainfall in December in Jersey (St Helier)19
Average monthly rainfall (mm)
102 mm monthly rainfall in January in Jersey (St Helier)102
77 mm monthly rainfall in February in Jersey (St Helier)77
76 mm monthly rainfall in March in Jersey (St Helier)76
55 mm monthly rainfall in April in Jersey (St Helier)55
56 mm monthly rainfall in May in Jersey (St Helier)56
48 mm monthly rainfall in June in Jersey (St Helier)48
42 mm monthly rainfall in July in Jersey (St Helier)42
52 mm monthly rainfall in August in Jersey (St Helier)52
75 mm monthly rainfall in September in Jersey (St Helier)75
91 mm monthly rainfall in October in Jersey (St Helier)91
115 mm monthly rainfall in November in Jersey (St Helier)115
112 mm monthly rainfall in December in Jersey (St Helier)112

More climate for Jersey

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (Maximum)
UV (maximum) index 1 (Low) in January in Jersey (St Helier)1
UV (maximum) index 2 (Low) in February in Jersey (St Helier)2
UV (maximum) index 3 (Moderate) in March in Jersey (St Helier)3
UV (maximum) index 4 (Moderate) in April in Jersey (St Helier)4
UV (maximum) index 6 (High) in May in Jersey (St Helier)6
UV (maximum) index 7 (High) in June in Jersey (St Helier)7
UV (maximum) index 7 (High) in July in Jersey (St Helier)7
UV (maximum) index 6 (High) in August in Jersey (St Helier)6
UV (maximum) index 4 (Moderate) in September in Jersey (St Helier)4
UV (maximum) index 2 (Low) in October in Jersey (St Helier)2
UV (maximum) index 1 (Low) in November in Jersey (St Helier)1
UV (maximum) index 1 (Low) in December in Jersey (St Helier)1
Heat & Humidity
No heat & humidity in January in Jersey (St Helier)0
No heat & humidity in February in Jersey (St Helier)0
No heat & humidity in March in Jersey (St Helier)0
No heat & humidity in April in Jersey (St Helier)0
No heat & humidity in May in Jersey (St Helier)0
No heat & humidity in June in Jersey (St Helier)0
No heat & humidity in July in Jersey (St Helier)0
No heat & humidity in August in Jersey (St Helier)0
No heat & humidity in September in Jersey (St Helier)0
No heat & humidity in October in Jersey (St Helier)0
No heat & humidity in November in Jersey (St Helier)0
No heat & humidity in December in Jersey (St Helier)0

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

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Recommended for Jersey

The climate guide for Jersey, represented by St Helier, (St Helier) 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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