Longyearbyen
Svalbard and Jan Mayen
Long-term weather forecast
Long-term weather forecast

April weather forecast and climate
Longyearbyen, Svalbard and Jan Mayen

The frozen Arctic Blue Sea overlooking the snow-covered mountains in the background, on a sunny winter morning, in Longyearbyen, Svalbard and Jan Mayen
The frozen Arctic Blue Sea overlooking the snow-covered mountains in the background, on a sunny winter morning, in Longyearbyen, Svalbard and Jan Mayen
April is a freezing cold spring month in Longyearbyen, Svalbard and Jan Mayen, with average temperature fluctuating between -9°C (15.8°F) and -16°C (3.2°F).

Temperature

In Longyearbyen, the average high-temperature marginally rises, from a frigid cold -13°C (8.6°F) in March, to a freezing cold -9°C (15.8°F). In Longyearbyen, in April, the average low-temperature is -16°C (3.2°F).

Rainfall

In Longyearbyen, in April, it is raining for 3 days, with typically 16mm (0.6") of accumulated precipitation. In Longyearbyen, during the entire year, the rain falls for 86 days and collects up to 271mm (10.7") of precipitation.

Snowfall

Months with snowfall are January through December.

Sea temperature

February and April, with an average sea temperature of 1°C (33.8°F), are months with the coldest seawater in Longyearbyen. For swimming, this is considered extremely cold, dangerous, and life-threatening. Unless suitably protected with insulated waterproof clothing, hypothermia quickly occurs.

Daylight

In Longyearbyen, the average length of the day is 20.8h.

Sunshine

In April, the average sunshine in Longyearbyen, Svalbard and Jan Mayen, is 7.6h.

UV index

The average daily maximum UV index in Longyearbyen is 1. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to the Sun's UV rays for the average person.
The daily maximum UV index of 1 in April interpret into the following advice:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in April in Longyearbyen?

In Longyearbyen, Svalbard and Jan Mayen, in April, the average high-temperature is -9°C (15.8°F), and the average low-temperature is -16°C (3.2°F).

How much does it rain in Longyearbyen in April?

In Longyearbyen, during April, the rain falls for 3 days and regularly aggregates up to 16mm (0.6") of precipitation.

How many days does it snow in April in Longyearbyen?

In April, snow falls for 17 days.

What months are the sea coldest in Longyearbyen?

February and April, with an average sea temperature of 1°C (33.8°F), are months with the coldest seawater in Longyearbyen, Svalbard and Jan Mayen. For swimming, this is considered extremely cold, dangerous, and life-threatening. Unless suitably protected with insulated waterproof clothing, hypothermia quickly occurs.

How cold is the water in April in Longyearbyen?

In Longyearbyen, in April, the average water temperature is 1°C (33.8°F). For swimming, this is considered very dangerous and immediately life-threatening. Total loss of breathing control instantly occurs, and clear thinking becomes almost impossible. A specialized swimsuit is obligatory to minimize thermal loss.

How many hours of daylight does Longyearbyen have in April?

In Longyearbyen, the average length of the day in April is 20.8h.

How long on average sun shines in April in Longyearbyen?

In Longyearbyen, the average sunshine in April is 7.6h.

What is the UV index reading in April in Longyearbyen?

The average daily maximum UV index in April is 1. A UV Index reading of 2, and below, represents a low health threat from the exposure to the Sun's UV radiation.
Average temperature in April - Longyearbyen, Svalbard and Jan Mayen
  • Average high temperature in April: -9°C

The warmest month (with the highest average high temperature) is July (7°C).
Months with the lowest average high temperature are January, February and March (-13°C).

  • Average low temperature in April: -16°C

The month with the highest average low temperature is July (3°C).
The coldest month (with the lowest average low temperature) is February (-21°C).

Average rainfall in April - Longyearbyen, Svalbard and Jan Mayen
  • Average rainfall in April: 16mm

The wettest month (with the highest rainfall) is August (30mm).
The driest month (with the lowest rainfall) is May (13mm).

Average rainfall days in April - Longyearbyen, Svalbard and Jan Mayen
  • Average rainfall days in April: 3 days

The month with the highest number of rainy days is August (18 days).
Months with the lowest number of rainy days are January, February and March (2 days).

Average snowfall days in April - Longyearbyen, Svalbard and Jan Mayen
  • Average snowfall days in April: 17 days

Months with the highest number of snowfall days are November and December (22 days).
The month with the lowest number of snowfall days is July (1 days).

Average sea temperature in April - Longyearbyen, Svalbard and Jan Mayen
  • Average sea temperature in April: 1°C

The best month for swimming (with the highest average sea temperature) is August (6°C).
Coldest months (with the lowest average sea temperature) are February and April (1°C).

Average daylight in April / Average sunshine in April - Longyearbyen, Svalbard and Jan Mayen
  • Average daylight in April: 20.8h

Months with the longest days are May, June and July (Average daylight: 24h).
Months with shortest days are January, November and December (Average daylight: 0h).

  • Average sunshine in April: 7.6h

The month with most sunshine is May (Average sunshine: 8.2h).
Months with least sunshine are January, February, November and December (Average sunshine: 0).

Average UV index in April - Longyearbyen, Svalbard and Jan Mayen
  • Average UV index in April: 1

Months with the highest UV index are May, June and July (UV index 2).
Months with the lowest UV index are January, February, March, October, November and December (UV index 0).