Juneau
Alaska, USA
Long-term weather forecast
Long-term weather forecast

April weather forecast and climate
Juneau, AK

Blooming fireweed in Juneau, Alaska, with snowy mountain peaks in the distance
Blooming fireweed in Juneau, Alaska, with snowy mountain peaks in the distance
April in Juneau, Alaska, is a wintry spring month, with average temperature ranging between max 37°F (2.8°C) and min 33.3°F (0.7°C).

Temperature

In April, the average high-temperature marginally rises, from a subzero cold 29.5°F (-1.4°C) in March, to a cold 37°F (2.8°C). The average low-temperature, in Juneau, Alaska, is 33.3°F (0.7°C).

Humidity

The average relative humidity in Juneau is 90%.

Rainfall

In April, the rain falls for 13.1 days. Throughout April, 6.02" (153mm) of precipitation is accumulated. Throughout the year, in Juneau, Alaska, there are 172.4 rainfall days, and 85.87" (2181mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Juneau are January through May, October through December. In April, it is snowing for 15.9 days. Throughout April, 29.45" (748mm) of snow is accumulated. Throughout the year, in Juneau, there are 126.6 snowfall days, and 290.12" (7369mm) of snow is accumulated.

Ocean temperature

In April, the average ocean temperature is 41.4°F (5.2°C).
Note: Swimming in 41.4°F (5.2°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

Daylight

The average length of the day in Juneau is 14.5h.

Sunshine

In April, the average sunshine is 5.1h.

UV index

January, April, October through December, with an average maximum UV index of 1, are months with the lowest UV index in Juneau. A UV Index reading of 2, and below, represents a minimal health hazard from unsafe exposure to the UV radiation for average individuals.
Note: The average daily UV index of 1 transform into the following instructions:
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 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in April in Juneau?

In Juneau, Alaska, in April, the average high-temperature is 37°F (2.8°C), and the average low-temperature is 33.3°F (0.7°C).

What is the average humidity in April in Juneau?

In Juneau, the average relative humidity in April is 90%.

How many days does it rain in April in Juneau?

In Juneau, Alaska, in April, during 13.1 rainfall days, 6.02" (153mm) of precipitation is typically accumulated.

How much does it snow in Juneau in April?

In Juneau, Alaska, in April, during 15.9 snowfall days, 29.45" (748mm) of snow is typically accumulated.

What is the ocean temperature in April in Juneau?

In April, the average ocean temperature in Juneau is 41.4°F (5.2°C). Swimming in 41.4°F (5.2°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

How many hours of daylight does Juneau have in April?

In Juneau, Alaska, the average length of the day in April is 14.5h.

How long on average sun shines in April in Juneau?

In April, the average sunshine in Juneau is 5.1h.

What is the month with the lowest UV index in Juneau?

January, April, October through December, with an average maximum UV index of 1, are months with the lowest UV index in Juneau.

What is the UV index intensity in April in Juneau?

In April, the average daily maximum UV index in Juneau is 1. A UV Index value of 2, and less, symbolizes a minimal hazard to health from unsafe exposure to the Sun's UV rays.
Average temperature in April - Juneau, AK
  • Average high temperature in April: 37°F

The warmest month (with the highest average high temperature) is July (55.8°F).
Months with the lowest average high temperature are January and December (25.7°F).

  • Average low temperature in April: 33.3°F

The month with the highest average low temperature is July (50°F).
The coldest month (with the lowest average low temperature) is January (23.7°F).

Average humidity in April - Juneau, AK
  • Average humidity in April: 90%

The month with the highest relative humidity is January (92%).
The month with the lowest relative humidity is May (86%).

Average rainfall in April - Juneau, AK
  • Average rainfall in April: 6.02"

The wettest month (with the highest rainfall) is October (9.88").
The driest month (with the lowest rainfall) is May (4.13").

Average rainfall days in April - Juneau, AK
  • Average rainfall days in April: 13.1 days

The month with the highest number of rainy days is September (21.9 days).
The month with the lowest number of rainy days is February (4.8 days).

Average snowfall in April - Juneau, AK
  • Average snowfall in April: 29.45"

The month with the highest snowfall is December (62.8").
Months with the lowest snowfall are June, July, August and September (0").

Average snowfall days in April - Juneau, AK
  • Average snowfall days in April: 15.9 days

The month with the highest number of snowfall days is January (21.9 days).
Months with the lowest number of snowfall days are June, July, August and September (0 days).

Average sea temperature in April - Juneau, AK
  • Average sea temperature in April: 41.3°F

The best month for swimming (with the highest average sea temperature) is August (53.5°F).
The coldest month (with the lowest average sea temperature) is March (40.3°F).

Average daylight in April / Average sunshine in April - Juneau, AK
  • Average daylight in April: 14.5h

The month with the longest days is June (Average daylight: 18.2h).
The month with shortest days is December (Average daylight: 6.5h).

  • Average sunshine in April: 5.1h

The month with most sunshine is June (Average sunshine: 6.4h).
The month with least sunshine is November (Average sunshine: 2.6h).

Average UV index in April - Juneau, AK
  • Average UV index in April: 1

Months with the highest UV index are May and July (UV index 3).
Months with the lowest UV index are January, April, October, November and December (UV index 1).