St Helier weather by month

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

Temperature
Rainfall
Sunshine & UV index

Temperature in St Helier (°C)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Max temperature (daytime)	8	8	10	12	16	18	20	20	19	16	12	9
Min temperature (night-time)	4	4	5	6	9	12	14	14	13	11	7	5
Heat & Humidity	0	0	0	0	0	0	0	0	0	0	0	0
Sea temperature	9	8	8	10	12	14	17	18	17	16	13	11

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

Sunshine & UV index in St Helier

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Daily hours of sunshine	2	3	4	6	8	8	8	8	6	4	3	2
Daily hours of daylight	9	10	12	14	15	16	16	14	13	11	9	8
UV Index (Maximum)	1	2	3	4	6	7	7	6	4	2	1	1

Rainfall in St Helier

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Number of days with some rain	20	16	16	14	13	11	10	11	13	15	19	19
Average monthly rainfall (mm)	102	77	76	55	56	48	42	52	75	91	115	112

More about St Helier

St Helier by month

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

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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.

What's the climate like in St Helier?

St Helier has a temperate climate with warm summers and some rainfall in all months.

St Helier weather in January

Expect daytime maximum temperatures of 8°C in St Helier, Jersey in January based on long-term weather averages. There are 2 hours of sunshine per day on average with 20 days with some rainfall and typically 102 mm of rainfall in the month.

8
8°C max day temperature
2
2 hours of sunshine per day
20
20 days with some rainfall
4
4°C min night temperature
9
9 hours of daylight per day
0
No heat & humidity
102
102 mm of monthly rainfall
1
1 (Low) UV index
9
9°C sea temperature

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St Helier weather in February

Expect daytime maximum temperatures of 8°C in St Helier, Jersey in February based on long-term weather averages. There are 3 hours of sunshine per day on average with 16 days with some rainfall and typically 77 mm of rainfall in the month.

8
8°C max day temperature
3
3 hours of sunshine per day
16
16 days with some rainfall
4
4°C min night temperature
10
10 hours of daylight per day
0
No heat & humidity
77
77 mm of monthly rainfall
2
2 (Low) UV index
8
8°C sea temperature

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St Helier weather in March

Expect daytime maximum temperatures of 10°C in St Helier, Jersey in March based on long-term weather averages. There are 4 hours of sunshine per day on average with 16 days with some rainfall and typically 76 mm of rainfall in the month.

10
10°C max day temperature
4
4 hours of sunshine per day
16
16 days with some rainfall
5
5°C min night temperature
12
12 hours of daylight per day
0
No heat & humidity
76
76 mm of monthly rainfall
3
3 (Moderate) UV index
8
8°C sea temperature

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St Helier weather in April

Expect daytime maximum temperatures of 12°C in St Helier, Jersey in April based on long-term weather averages. There are 6 hours of sunshine per day on average with 14 days with some rainfall and typically 55 mm of rainfall in the month.

12
12°C max day temperature
6
6 hours of sunshine per day
14
14 days with some rainfall
6
6°C min night temperature
14
14 hours of daylight per day
0
No heat & humidity
55
55 mm of monthly rainfall
4
4 (Moderate) UV index
10
10°C sea temperature

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St Helier weather in May

Expect daytime maximum temperatures of 16°C in St Helier, Jersey in May based on long-term weather averages. There are 8 hours of sunshine per day on average with 13 days with some rainfall and typically 56 mm of rainfall in the month.

16
16°C max day temperature
8
8 hours of sunshine per day
13
13 days with some rainfall
9
9°C min night temperature
15
15 hours of daylight per day
0
No heat & humidity
56
56 mm of monthly rainfall
6
6 (High) UV index
12
12°C sea temperature

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St Helier weather in June

Expect daytime maximum temperatures of 18°C in St Helier, Jersey in June based on long-term weather averages. There are 8 hours of sunshine per day on average with 11 days with some rainfall and typically 48 mm of rainfall in the month.

18
18°C max day temperature
8
8 hours of sunshine per day
11
11 days with some rainfall
12
12°C min night temperature
16
16 hours of daylight per day
0
No heat & humidity
48
48 mm of monthly rainfall
7
7 (High) UV index
14
14°C sea temperature

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St Helier weather in July

Expect daytime maximum temperatures of 20°C in St Helier, Jersey in July based on long-term weather averages. There are 8 hours of sunshine per day on average with 10 days with some rainfall and typically 42 mm of rainfall in the month.

20
20°C max day temperature
8
8 hours of sunshine per day
10
10 days with some rainfall
14
14°C min night temperature
16
16 hours of daylight per day
0
No heat & humidity
42
42 mm of monthly rainfall
7
7 (High) UV index
17
17°C sea temperature

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St Helier weather in August

Expect daytime maximum temperatures of 20°C in St Helier, Jersey in August based on long-term weather averages. There are 8 hours of sunshine per day on average with 11 days with some rainfall and typically 52 mm of rainfall in the month.

20
20°C max day temperature
8
8 hours of sunshine per day
11
11 days with some rainfall
14
14°C min night temperature
14
14 hours of daylight per day
0
No heat & humidity
52
52 mm of monthly rainfall
6
6 (High) UV index
18
18°C sea temperature

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St Helier weather in September

Expect daytime maximum temperatures of 19°C in St Helier, Jersey in September based on long-term weather averages. There are 6 hours of sunshine per day on average with 13 days with some rainfall and typically 75 mm of rainfall in the month.

19
19°C max day temperature
6
6 hours of sunshine per day
13
13 days with some rainfall
13
13°C min night temperature
13
13 hours of daylight per day
0
No heat & humidity
75
75 mm of monthly rainfall
4
4 (Moderate) UV index
17
17°C sea temperature

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St Helier weather in October

Expect daytime maximum temperatures of 16°C in St Helier, Jersey in October based on long-term weather averages. There are 4 hours of sunshine per day on average with 15 days with some rainfall and typically 91 mm of rainfall in the month.

16
16°C max day temperature
4
4 hours of sunshine per day
15
15 days with some rainfall
11
11°C min night temperature
11
11 hours of daylight per day
0
No heat & humidity
91
91 mm of monthly rainfall
2
2 (Low) UV index
16
16°C sea temperature

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St Helier weather in November

Expect daytime maximum temperatures of 12°C in St Helier, Jersey in November based on long-term weather averages. There are 3 hours of sunshine per day on average with 19 days with some rainfall and typically 115 mm of rainfall in the month.

12
12°C max day temperature
3
3 hours of sunshine per day
19
19 days with some rainfall
7
7°C min night temperature
9
9 hours of daylight per day
0
No heat & humidity
115
115 mm of monthly rainfall
1
1 (Low) UV index
13
13°C sea temperature

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St Helier weather in December

Expect daytime maximum temperatures of 9°C in St Helier, Jersey in December based on long-term weather averages. There are 2 hours of sunshine per day on average with 19 days with some rainfall and typically 112 mm of rainfall in the month.

9
9°C max day temperature
2
2 hours of sunshine per day
19
19 days with some rainfall
5
5°C min night temperature
8
8 hours of daylight per day
0
No heat & humidity
112
112 mm of monthly rainfall
1
1 (Low) UV index
11
11°C sea temperature

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