Monthly weather forecast and climate
Saint Helier, Jersey

A shot of the Elizabeth Castle found on Tidal Island in Saint Helier Parish, Jersey
A shot of the Elizabeth Castle found on Tidal Island in Saint Helier Parish, Jersey
January, like December, is a frosty winter month in Saint Helier, Jersey, with average temperature varying between 7.3°C (45.1°F) and 9.3°C (48.7°F). In January, the average high-temperature is practically the same as in December - a frosty 9.3°C (48.7°F). Weather in January »

The last month of the winter, February, is also a frosty month in Saint Helier, Jersey, with average temperature fluctuating between 6.8°C (44.2°F) and 9°C (48.2°F). February is the coldest month, with an average high-temperature of 9°C (48.2°F) and an average low-temperature of 6.8°C (44.2°F). Weather in February »

The first month of the spring, March, is still a chilly month in Saint Helier, Jersey, with temperature in the range of an average low of 7.5°C (45.5°F) and an average high of 9.9°C (49.8°F). In Saint Helier, the average high-temperature is practically the same as in February - a still chilly 9.9°C (49.8°F). Weather in March »

April in Saint Helier, Jersey, is a fresh spring month, with temperature in the range of an average low of 9.1°C (48.4°F) and an average high of 11.4°C (52.5°F). In April, the average high-temperature is essentially the same as in March - a fresh 11.4°C (52.5°F). Weather in April »

May, the last month of the spring, in Saint Helier, is a moderate month, with temperature in the range of an average high of 13.3°C (55.9°F) and an average low of 11°C (51.8°F). In May, the average high-temperature is relatively the same as in April - a mild 13.3°C (55.9°F). Weather in May »

June, the first month of the summer, in Saint Helier, is still a mild month, with temperature in the range of an average high of 15.8°C (60.4°F) and an average low of 13.2°C (55.8°F). In Saint Helier, the average high-temperature is practically the same as in May - a still moderate 15.8°C (60.4°F). Weather in June »

July is an enjoyable summer month in Saint Helier, Jersey, with average temperature fluctuating between 15.6°C (60.1°F) and 17.6°C (63.7°F). In Saint Helier, the average high-temperature in July is practically the same as in June - an enjoyable 17.6°C (63.7°F). Weather in July »

The last month of the summer, August, is also an enjoyable month in Saint Helier, Jersey, with average temperature ranging between min 16.3°C (61.3°F) and max 18.2°C (64.8°F). The warmest month is August, with an average high-temperature of 18.2°C (64.8°F) and an average low-temperature of 16.3°C (61.3°F). Weather in August »

The first month of the autumn, September, is also an enjoyable month in Saint Helier, Jersey, with average temperature varying between 15.3°C (59.5°F) and 17.5°C (63.5°F). In Saint Helier, the average high-temperature is essentially the same as in August - a still enjoyable 17.5°C (63.5°F). Weather in September »

October, the same as September, in Saint Helier, Jersey, is another mild autumn month, with average temperature varying between 15.5°C (59.9°F) and 13.5°C (56.3°F). In Saint Helier, the average high-temperature in October is almost the same as in September - a moderate 15.5°C (59.9°F). Weather in October »

The last month of the autumn, November, is another cool month in Saint Helier, Jersey, with average temperature ranging between min 10.7°C (51.3°F) and max 12.7°C (54.9°F). In Saint Helier, the average high-temperature is essentially the same as in October - a cool 12.7°C (54.9°F). Weather in November »

December, the first month of the winter, in Saint Helier, is still a cool month, with average temperature ranging between max 10.9°C (51.6°F) and min 8.7°C (47.7°F). In December, the average high-temperature is essentially the same as in November - a still fresh 10.9°C (51.6°F). Weather in December »

How much does it rain in Saint Helier?

Throughout the year, in Saint Helier, there are 189 rainfall days, and 538mm (21.18") of precipitation is accumulated.

When does it snow in Saint Helier?

Months with snowfall are January through March, November and December.

How many days does it snow in Saint Helier?

In Saint Helier, during the entire year, snow falls for 1.4 days, and aggregates up to 6mm (0.24") of snow.

When does it snow the most in Saint Helier?

The month with the most snowfall is January when snow falls for 0.4 days and typically aggregates up to 2mm (0.08") of snow.

What is the month with the least sunshine in Saint Helier?

Months with the least sunshine are January and November, with an average of 4h of sunshine.

When is the lowest UV index in Saint Helier?

Months with the lowest UV index in Saint Helier are January and February, with an average maximum UV index of 2.

What is the coldest month in Saint Helier?

February is the coldest month, with an average high-temperature of 9°C (48.2°F) and an average low-temperature of 6.8°C (44.2°F).

When is the sea coldest in Saint Helier?

February and March, with an average sea temperature of 9°C (48.2°F), are months with the coldest seawater.

When it does not snow in Saint Helier?

April through October are months without snowfall in Saint Helier, Jersey.

What are the most humid months in Saint Helier?

Months with the highest humidity in Saint Helier, Jersey, are June and July, with an average relative humidity of 83%.

When are the longest days in Saint Helier?

June has the longest days of the year in Saint Helier, Jersey, with an average of 16.2h of daylight.

What is the month with the highest UV index in Saint Helier?

Months with the highest UV index are June through September, with an average maximum UV index of 5.

What is the driest month in Saint Helier?

The month with the least rainfall in Saint Helier, Jersey, is July when the rain falls for 12.2 days and typically collects 25mm (0.98") of precipitation.

What month has the most sunshine in Saint Helier?

July has the most sunshine of the year in Saint Helier, Jersey, with an average of 9.7h of sunshine.

What is the warmest month in Saint Helier?

With an average high-temperature of 18.2°C (64.8°F) and an average low-temperature of 16.3°C (61.3°F), August is the warmest month.

When is the sea warmest in Saint Helier?

With an average sea temperature of 17°C (62.6°F), August is the month with the warmest seawater.

What is the least humid month in Saint Helier?

November and December, with an average relative humidity of 78%, are the least humid months in Saint Helier, Jersey.

What is the wettest month in Saint Helier?

The month with the most rainfall in Saint Helier, Jersey, is November when the rain falls for 21.2 days and typically aggregates up to 78mm (3.07") of precipitation.

What is the month with the shortest days in Saint Helier?

With an average of 8.3h of daylight, December has the shortest days of the year in Saint Helier.
Average temperature - Saint Helier, Jersey
Average humidity - Saint Helier, Jersey
Average rainfall - Saint Helier, Jersey
Average rainfall days - Saint Helier, Jersey

The month with the highest number of rainy days is November (21.2 days).
Months with the least rainy days are May and July (12.2 days).

Average snowfall - Saint Helier, Jersey

The month with the highest snowfall is January (2mm).
Months with the least snowfall are April, May, June, July, August, September and October (0mm).

Average snowfall days - Saint Helier, Jersey

Months with the highest number of snowfall days are January and February (0.4 days).
Months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average sea temperature - Saint Helier, Jersey
Average daylight / Average sunshine - Saint Helier, Jersey

The month with the longest days is June (Average daylight: 16.2h).
The month with the shortest days is December (Average daylight: 8.3h).

The month with the most sunshine is July (Average sunshine: 9.7h).
Months with the least sunshine are January and November (Average sunshine: 4).

Average UV index - Saint Helier, Jersey