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

March 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
March, the first month of the spring, in Saint Helier, is a cool month, with average temperature varying between 10.9°C (51.6°F) and 5.4°C (41.7°F).

Temperature

In Saint Helier, the average high-temperature in March is essentially the same as in February - a fresh 10.9°C (51.6°F). In March, the average low-temperature is 5.4°C (41.7°F).

Rainfall

In March, the rain falls for 16.3 days. Throughout March, 70.8mm (2.8") of precipitation is accumulated. In Saint Helier, during the entire year, the rain falls for 176.4 days and collects up to 853.3mm (33.6") of precipitation.

Sea temperature

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

The average length of the day in Saint Helier is 11.9h.

Sunshine

The average sunshine in March is 4h.

UV index

In Saint Helier, Jersey, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from the exposure to the Sun's UV rays for the average person.
In March, the average maximum UV index of 3 translate into the following recommendations:
Take precautions - Protection against the skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the temperature in March in Saint Helier?

The average high-temperature, in March, in Saint Helier, is 10.9°C (51.6°F), while the average low-temperature is 5.4°C (41.7°F).

How much does it rain in Saint Helier in March?

In Saint Helier, Jersey, during March, the rain falls for 16.3 days and regularly aggregates up to 70.8mm (2.8") of precipitation.

What months are 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 in Saint Helier, Jersey. 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.

What is the water temperature in March in Saint Helier?

In Saint Helier, the average seawater temperature in March is 9°C (48.2°F). Swimming in 9°C (48.2°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.

What is the average length of the day in March in Saint Helier?

The average length of the day in March in Saint Helier is 11.9h.

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

In March, the average sunshine in Saint Helier, Jersey, is 4h.

How high is the UV index in March in Saint Helier?

In March, the average daily maximum UV index in Saint Helier is 3. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to the Sun's UV rays.
Average temperature in March - Saint Helier, Jersey
  • Average high temperature in March: 10.9°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 March: 5.4°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 March - Saint Helier, Jersey
  • Average rainfall in March: 70.8mm

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 March - Saint Helier, Jersey
  • Average rainfall days in March: 16.3 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 March - Saint Helier, Jersey
  • Average sea temperature in March: 9°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 March / Average sunshine in March - Saint Helier, Jersey
  • Average daylight in March: 11.9h

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 March: 4h

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 March - Saint Helier, Jersey
  • Average UV index in March: 3

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).