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 in St Helier (°F)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
46°F maximum daytime temperature in January in St Helier46
46°F maximum daytime temperature in February in St Helier46
50°F maximum daytime temperature in March in St Helier50
54°F maximum daytime temperature in April in St Helier54
61°F maximum daytime temperature in May in St Helier61
64°F maximum daytime temperature in June in St Helier64
68°F maximum daytime temperature in July in St Helier68
68°F maximum daytime temperature in August in St Helier68
66°F maximum daytime temperature in September in St Helier66
61°F maximum daytime temperature in October in St Helier61
54°F maximum daytime temperature in November in St Helier54
48°F maximum daytime temperature in December in St Helier48
Min temperature (night-time)
39°F minimum night-time temperature in January in St Helier39
39°F minimum night-time temperature in February in St Helier39
41°F minimum night-time temperature in March in St Helier41
43°F minimum night-time temperature in April in St Helier43
48°F minimum night-time temperature in May in St Helier48
54°F minimum night-time temperature in June in St Helier54
57°F minimum night-time temperature in July in St Helier57
57°F minimum night-time temperature in August in St Helier57
55°F minimum night-time temperature in September in St Helier55
52°F minimum night-time temperature in October in St Helier52
45°F minimum night-time temperature in November in St Helier45
41°F minimum night-time temperature in December in St Helier41
Heat & Humidity
No heat & humidity in January in St Helier0
No heat & humidity in February in St Helier0
No heat & humidity in March in St Helier0
No heat & humidity in April in St Helier0
No heat & humidity in May in St Helier0
No heat & humidity in June in St Helier0
No heat & humidity in July in St Helier0
No heat & humidity in August in St Helier0
No heat & humidity in September in St Helier0
No heat & humidity in October in St Helier0
No heat & humidity in November in St Helier0
No heat & humidity in December in St Helier0
Sea temperature
48°F sea temperature in January in St Helier48
46°F sea temperature in February in St Helier46
46°F sea temperature in March in St Helier46
50°F sea temperature in April in St Helier50
54°F sea temperature in May in St Helier54
57°F sea temperature in June in St Helier57
63°F sea temperature in July in St Helier63
64°F sea temperature in August in St Helier64
63°F sea temperature in September in St Helier63
61°F sea temperature in October in St Helier61
55°F sea temperature in November in St Helier55
52°F sea temperature in December in St Helier52

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
Daily hours of daylight
9 hours of daylight per day in January in St Helier9
10 hours of daylight per day in February in St Helier10
12 hours of daylight per day in March in St Helier12
14 hours of daylight per day in April in St Helier14
15 hours of daylight per day in May in St Helier15
16 hours of daylight per day in June in St Helier16
16 hours of daylight per day in July in St Helier16
14 hours of daylight per day in August in St Helier14
13 hours of daylight per day in September in St Helier13
11 hours of daylight per day in October in St Helier11
9 hours of daylight per day in November in St Helier9
8 hours of daylight per day in December in St Helier8
UV Index (Maximum)
UV (maximum) index 1 (Low) in January in St Helier1
UV (maximum) index 2 (Low) in February in St Helier2
UV (maximum) index 3 (Moderate) in March in St Helier3
UV (maximum) index 4 (Moderate) in April in St Helier4
UV (maximum) index 6 (High) in May in St Helier6
UV (maximum) index 7 (High) in June in St Helier7
UV (maximum) index 7 (High) in July in St Helier7
UV (maximum) index 6 (High) in August in St Helier6
UV (maximum) index 4 (Moderate) in September in St Helier4
UV (maximum) index 2 (Low) in October in St Helier2
UV (maximum) index 1 (Low) in November in St Helier1
UV (maximum) index 1 (Low) in December in St Helier1

Rainfall in St Helier

  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 St Helier20
16 days with some rainfall in February in St Helier16
16 days with some rainfall in March in St Helier16
14 days with some rainfall in April in St Helier14
13 days with some rainfall in May in St Helier13
11 days with some rainfall in June in St Helier11
10 days with some rainfall in July in St Helier10
11 days with some rainfall in August in St Helier11
13 days with some rainfall in September in St Helier13
15 days with some rainfall in October in St Helier15
19 days with some rainfall in November in St Helier19
19 days with some rainfall in December in St Helier19
Average monthly rainfall (inches)
4.0 inches monthly rainfall in January in St Helier4.0
3.0 inches monthly rainfall in February in St Helier3.0
3.0 inches monthly rainfall in March in St Helier3.0
2.2 inches monthly rainfall in April in St Helier2.2
2.2 inches monthly rainfall in May in St Helier2.2
1.9 inches monthly rainfall in June in St Helier1.9
1.7 inches monthly rainfall in July in St Helier1.7
2.0 inches monthly rainfall in August in St Helier2.0
3.0 inches monthly rainfall in September in St Helier3.0
3.6 inches monthly rainfall in October in St Helier3.6
4.5 inches monthly rainfall in November in St Helier4.5
4.4 inches monthly rainfall in December in St Helier4.4

More about St Helier

St Helier by month

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

Recommended for Jersey

TUI: Top deals & discounts on 2026/2027 holidays

  • Explore latest special offers & online deals from TUI
  • Free child places & £0 deposits with direct debit available
  • Book summer & winter sun holidays in 2026/2027
Go to TUI deal >>

View all TUI offers

TUITUI deal finder

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 46°F 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 4.0 inches of rainfall in the month.

  • 46°F maximum daytime temperature in January in St Helier46
    46°F max day temperature
  • 2 hours of sunshine per day
  • 20 days with some rainfall in January in St Helier20
    20 days with some rainfall
  • 39°F minimum night-time temperature in January in St Helier39
    39°F min night temperature
  • 9 hours of daylight per day in January in St Helier9
    9 hours of daylight per day
  • No heat & humidity in January in St Helier0
    No heat & humidity
  • 4.0 inches monthly rainfall in January in St Helier4.0
    4.0 inches of monthly rainfall
  • UV (maximum) index 1 (Low) in January in St Helier1
    1 (Low) UV index
  • 48°F sea temperature in January in St Helier48
    48°F sea temperature

Back to months

St Helier weather in February

Expect daytime maximum temperatures of 46°F 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 3.0 inches of rainfall in the month.

  • 46°F maximum daytime temperature in February in St Helier46
    46°F max day temperature
  • 3 hours of sunshine per day
  • 16 days with some rainfall in February in St Helier16
    16 days with some rainfall
  • 39°F minimum night-time temperature in February in St Helier39
    39°F min night temperature
  • 10 hours of daylight per day in February in St Helier10
    10 hours of daylight per day
  • No heat & humidity in February in St Helier0
    No heat & humidity
  • 3.0 inches monthly rainfall in February in St Helier3.0
    3.0 inches of monthly rainfall
  • UV (maximum) index 2 (Low) in February in St Helier2
    2 (Low) UV index
  • 46°F sea temperature in February in St Helier46
    46°F sea temperature

Back to months

St Helier weather in March

Expect daytime maximum temperatures of 50°F 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 3.0 inches of rainfall in the month.

  • 50°F maximum daytime temperature in March in St Helier50
    50°F max day temperature
  • 4 hours of sunshine per day
  • 16 days with some rainfall in March in St Helier16
    16 days with some rainfall
  • 41°F minimum night-time temperature in March in St Helier41
    41°F min night temperature
  • 12 hours of daylight per day in March in St Helier12
    12 hours of daylight per day
  • No heat & humidity in March in St Helier0
    No heat & humidity
  • 3.0 inches monthly rainfall in March in St Helier3.0
    3.0 inches of monthly rainfall
  • UV (maximum) index 3 (Moderate) in March in St Helier3
    3 (Moderate) UV index
  • 46°F sea temperature in March in St Helier46
    46°F sea temperature

Back to months

St Helier weather in April

Expect daytime maximum temperatures of 54°F 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 2.2 inches of rainfall in the month.

  • 54°F maximum daytime temperature in April in St Helier54
    54°F max day temperature
  • 6 hours of sunshine per day
  • 14 days with some rainfall in April in St Helier14
    14 days with some rainfall
  • 43°F minimum night-time temperature in April in St Helier43
    43°F min night temperature
  • 14 hours of daylight per day in April in St Helier14
    14 hours of daylight per day
  • No heat & humidity in April in St Helier0
    No heat & humidity
  • 2.2 inches monthly rainfall in April in St Helier2.2
    2.2 inches of monthly rainfall
  • UV (maximum) index 4 (Moderate) in April in St Helier4
    4 (Moderate) UV index
  • 50°F sea temperature in April in St Helier50
    50°F sea temperature

Back to months

St Helier weather in May

Expect daytime maximum temperatures of 61°F 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 2.2 inches of rainfall in the month.

  • 61°F maximum daytime temperature in May in St Helier61
    61°F max day temperature
  • 8 hours of sunshine per day
  • 13 days with some rainfall in May in St Helier13
    13 days with some rainfall
  • 48°F minimum night-time temperature in May in St Helier48
    48°F min night temperature
  • 15 hours of daylight per day in May in St Helier15
    15 hours of daylight per day
  • No heat & humidity in May in St Helier0
    No heat & humidity
  • 2.2 inches monthly rainfall in May in St Helier2.2
    2.2 inches of monthly rainfall
  • UV (maximum) index 6 (High) in May in St Helier6
    6 (High) UV index
  • 54°F sea temperature in May in St Helier54
    54°F sea temperature

Back to months

St Helier weather in June

Expect daytime maximum temperatures of 64°F 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 1.9 inches of rainfall in the month.

  • 64°F maximum daytime temperature in June in St Helier64
    64°F max day temperature
  • 8 hours of sunshine per day
  • 11 days with some rainfall in June in St Helier11
    11 days with some rainfall
  • 54°F minimum night-time temperature in June in St Helier54
    54°F min night temperature
  • 16 hours of daylight per day in June in St Helier16
    16 hours of daylight per day
  • No heat & humidity in June in St Helier0
    No heat & humidity
  • 1.9 inches monthly rainfall in June in St Helier1.9
    1.9 inches of monthly rainfall
  • UV (maximum) index 7 (High) in June in St Helier7
    7 (High) UV index
  • 57°F sea temperature in June in St Helier57
    57°F sea temperature

Back to months

St Helier weather in July

Expect daytime maximum temperatures of 68°F 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 1.7 inches of rainfall in the month.

  • 68°F maximum daytime temperature in July in St Helier68
    68°F max day temperature
  • 8 hours of sunshine per day
  • 10 days with some rainfall in July in St Helier10
    10 days with some rainfall
  • 57°F minimum night-time temperature in July in St Helier57
    57°F min night temperature
  • 16 hours of daylight per day in July in St Helier16
    16 hours of daylight per day
  • No heat & humidity in July in St Helier0
    No heat & humidity
  • 1.7 inches monthly rainfall in July in St Helier1.7
    1.7 inches of monthly rainfall
  • UV (maximum) index 7 (High) in July in St Helier7
    7 (High) UV index
  • 63°F sea temperature in July in St Helier63
    63°F sea temperature

Back to months

St Helier weather in August

Expect daytime maximum temperatures of 68°F 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 2.0 inches of rainfall in the month.

  • 68°F maximum daytime temperature in August in St Helier68
    68°F max day temperature
  • 8 hours of sunshine per day
  • 11 days with some rainfall in August in St Helier11
    11 days with some rainfall
  • 57°F minimum night-time temperature in August in St Helier57
    57°F min night temperature
  • 14 hours of daylight per day in August in St Helier14
    14 hours of daylight per day
  • No heat & humidity in August in St Helier0
    No heat & humidity
  • 2.0 inches monthly rainfall in August in St Helier2.0
    2.0 inches of monthly rainfall
  • UV (maximum) index 6 (High) in August in St Helier6
    6 (High) UV index
  • 64°F sea temperature in August in St Helier64
    64°F sea temperature

Back to months

St Helier weather in September

Expect daytime maximum temperatures of 66°F 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 3.0 inches of rainfall in the month.

  • 66°F maximum daytime temperature in September in St Helier66
    66°F max day temperature
  • 6 hours of sunshine per day
  • 13 days with some rainfall in September in St Helier13
    13 days with some rainfall
  • 55°F minimum night-time temperature in September in St Helier55
    55°F min night temperature
  • 13 hours of daylight per day in September in St Helier13
    13 hours of daylight per day
  • No heat & humidity in September in St Helier0
    No heat & humidity
  • 3.0 inches monthly rainfall in September in St Helier3.0
    3.0 inches of monthly rainfall
  • UV (maximum) index 4 (Moderate) in September in St Helier4
    4 (Moderate) UV index
  • 63°F sea temperature in September in St Helier63
    63°F sea temperature

Back to months

St Helier weather in October

Expect daytime maximum temperatures of 61°F 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 3.6 inches of rainfall in the month.

  • 61°F maximum daytime temperature in October in St Helier61
    61°F max day temperature
  • 4 hours of sunshine per day
  • 15 days with some rainfall in October in St Helier15
    15 days with some rainfall
  • 52°F minimum night-time temperature in October in St Helier52
    52°F min night temperature
  • 11 hours of daylight per day in October in St Helier11
    11 hours of daylight per day
  • No heat & humidity in October in St Helier0
    No heat & humidity
  • 3.6 inches monthly rainfall in October in St Helier3.6
    3.6 inches of monthly rainfall
  • UV (maximum) index 2 (Low) in October in St Helier2
    2 (Low) UV index
  • 61°F sea temperature in October in St Helier61
    61°F sea temperature

Back to months

St Helier weather in November

Expect daytime maximum temperatures of 54°F 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 4.5 inches of rainfall in the month.

  • 54°F maximum daytime temperature in November in St Helier54
    54°F max day temperature
  • 3 hours of sunshine per day
  • 19 days with some rainfall in November in St Helier19
    19 days with some rainfall
  • 45°F minimum night-time temperature in November in St Helier45
    45°F min night temperature
  • 9 hours of daylight per day in November in St Helier9
    9 hours of daylight per day
  • No heat & humidity in November in St Helier0
    No heat & humidity
  • 4.5 inches monthly rainfall in November in St Helier4.5
    4.5 inches of monthly rainfall
  • UV (maximum) index 1 (Low) in November in St Helier1
    1 (Low) UV index
  • 55°F sea temperature in November in St Helier55
    55°F sea temperature

Back to months

St Helier weather in December

Expect daytime maximum temperatures of 48°F 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 4.4 inches of rainfall in the month.

  • 48°F maximum daytime temperature in December in St Helier48
    48°F max day temperature
  • 2 hours of sunshine per day
  • 19 days with some rainfall in December in St Helier19
    19 days with some rainfall
  • 41°F minimum night-time temperature in December in St Helier41
    41°F min night temperature
  • 8 hours of daylight per day in December in St Helier8
    8 hours of daylight per day
  • No heat & humidity in December in St Helier0
    No heat & humidity
  • 4.4 inches monthly rainfall in December in St Helier4.4
    4.4 inches of monthly rainfall
  • UV (maximum) index 1 (Low) in December in St Helier1
    1 (Low) UV index
  • 52°F sea temperature in December in St Helier52
    52°F sea temperature

Back to months

More about St Helier

St Helier by month

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

Recommended for Jersey

TUI: Top deals & discounts on 2026/2027 holidays

  • Explore latest special offers & online deals from TUI
  • Free child places & £0 deposits with direct debit available
  • Book summer & winter sun holidays in 2026/2027
Go to TUI deal >>

View all TUI offers

TUITUI deal finder

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.

Tropical storm risk: St Helier, Jersey hurricane season

% of month affected by tropical storms
0
0
0
0
0
0
0
0
0
0
0
0
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Compare St Helier weather with the UK

The weather chart below compares the average monthly maximum daytime temperature for St Helier, Jersey and the UK (London).

Maximum daytime temperature (°F)

St Helier, Jersey
UK (London)
46
45
46
45
50
50
54
55
61
63
64
68
68
72
68
72
66
66
61
59
54
50
48
46
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C)  |  Imperial (°F)

Compare more weather >>

Back to top

Related posts

Popular travel offers

Explore holiday destinations

More holidays

Save with latest deals & discounts

More deals

Airport parking

More parking

Airport lounges

More lounges

Top ^