Saint Helier
Jersey
Long-term weather forecast
Long-term weather forecast

April 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
April in Saint Helier, Jersey, is a moderate spring month, with temperature in the range of an average low of 6.6°C (43.9°F) and an average high of 13.2°C (55.8°F).

Temperature

In April, the average high-temperature is almost the same as in March - a moderate 13.2°C (55.8°F). In Saint Helier, Jersey, the average low-temperature is 6.6°C (43.9°F).

Rainfall

In Saint Helier, during April, the rain falls for 13.3 days and regularly aggregates up to 54.4mm (2.1") of precipitation. Throughout the year, there are 176.4 rainfall days, and 853.3mm (33.6") of precipitation is accumulated.

Sea temperature

In April, the average sea temperature in Saint Helier is 10°C (50°F).
Note: At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 13°C (55.4°F) is not comfortable.

Daylight

In Saint Helier, the average length of the day is 13.8h.

Sunshine

In April, the average sunshine is 6h.

UV index

In Saint Helier, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 4 interpret into the following advice:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in April in Saint Helier?

The average high-temperature, in April, in Saint Helier, Jersey, is 13.2°C (55.8°F), while the average low-temperature is 6.6°C (43.9°F).

How many days does it rain in April in Saint Helier?

In Saint Helier, in April, it is raining for 13.3 days, with typically 54.4mm (2.1") of accumulated precipitation.

How cold is the water in April in Saint Helier?

In April, the average sea temperature in Saint Helier, Jersey, is 10°C (50°F). Swimming in 10°C (50°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique.

How many hours of daylight does Saint Helier have in April?

In Saint Helier, Jersey, the average length of the day in April is 13.8h.

How long on average sun shines in April in Saint Helier?

In April, the average sunshine in Saint Helier is 6h.

What is the UV index reading in April in Saint Helier?

In April, the average daily maximum UV index in Saint Helier, Jersey, is 4. A UV Index reading of 3 to 5 represents a moderate vulnerability from unprotected exposure to the UV radiation.
Average temperature in April - Saint Helier, Jersey
  • Average high temperature in April: 13.2°C

The warmest month (with the highest average high temperature) is August (21.2°C).
The month with the lowest average high temperature is January (9.5°C).

  • Average low temperature in April: 6.6°C

The month with the highest average low temperature is August (14.4°C).
The coldest month (with the lowest average low temperature) is February (4°C).

Average rainfall in April - Saint Helier, Jersey
  • Average rainfall in April: 54.4mm

The wettest month (with the highest rainfall) is December (110.5mm).
The driest month (with the lowest rainfall) is July (37mm).

Average rainfall days in April - Saint Helier, Jersey
  • Average rainfall days in April: 13.3 days

The month with the highest number of rainy days is December (19.5 days).
The month with the lowest number of rainy days is July (9.9 days).

Average sea temperature in April - Saint Helier, Jersey
  • Average sea temperature in April: 10°C

The best month for swimming (with the highest average sea temperature) is August (17°C).
Coldest months (with the lowest average sea temperature) are February and March (9°C).

Average daylight in April / Average sunshine in April - Saint Helier, Jersey
  • Average daylight in April: 13.8h

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

  • Average sunshine in April: 6h

Months with most sunshine are May, June, July and August (Average sunshine: 8h).
Months with least sunshine are January and December (Average sunshine: 2).

Average UV index in April - Saint Helier, Jersey
  • Average UV index in April: 4

Months with the highest UV index are June and July (UV index 7).
Months with the lowest UV index are January, November and December (UV index 1).