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

Weather in April

April is a cold spring month in Juneau, Alaska, with average temperature fluctuating between 26.4°F (-3.1°C) and 37°F (2.8°C).

Temperature

In Juneau, Alaska, the average high-temperature slightly increases, from a freezing cold 29.5°F (-1.4°C) in March, to a wintry 37°F (2.8°C). In Juneau, the average low-temperature is 26.4°F (-3.1°C).

Humidity

In April, the average relative humidity is 90%.

Rainfall

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

Snowfall

January through May, October through December are months with snowfall in Juneau, Alaska. In April, in Juneau, 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 Juneau, the average seawater temperature is 41.4°F (5.2°C).
Note: Swimming in 41.4°F (5.2°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

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

Sunshine

In April, the average sunshine in Juneau 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. A UV Index of 2, and less, symbolizes a minimal health hazard from the exposure to the Sun's UV rays for the average person.
Note: In April, the average maximum UV index of 1 translate into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in April in Juneau?

In April, in Juneau, Alaska, the average high-temperature is 37°F (2.8°C), and the average low-temperature is 26.4°F (-3.1°C).

What is the average humidity in April in Juneau?

The average relative humidity in April in Juneau 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 April, in Juneau, it is snowing for 15.9 days. Throughout April, 29.45" (748mm) of snow is accumulated.

How cold is the water in April in Juneau?

In Juneau, in April, the average water temperature 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 many hours of sunshine does Juneau have in April?

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

What are the months with the lowest UV index in Juneau?

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

What is the UV index intensity in April in Juneau?

In Juneau, the average daily maximum UV index in April is 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to the Sun's UV rays.

Average temperature in April
Juneau, AK

Average temperature in April - Juneau, AK
  • Average high temperature in April: 2.8°C

The warmest month (with the highest average high temperature) is July (13.2°C).
Months with the lowest average high temperature are January and December (-3.5°C).

  • Average low temperature in April: -3.1°C

The month with the highest average low temperature is July (7.3°C).
The coldest month (with the lowest average low temperature) is February (-8.3°C).

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Average pressure in April
Juneau, AK

Average pressure in April - Juneau, AK
  • Average pressure in April: 1013.2mbar

The month with the highest atmospheric pressure is July (1016.8mbar).
The month with the lowest atmospheric pressure is November (1009.1mbar).

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Average wind speed in April
Juneau, AK

Average wind speed in April - Juneau, AK
  • Average wind speed in April: 7.6km/h

The windiest month (with the highest average wind speed) is January (11.1km/h).
The calmest month (with the lowest average wind speed) is June (5.9km/h).

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Average humidity in April
Juneau, AK

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%).

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Average rainfall in April
Juneau, AK

Average rainfall in April - Juneau, AK
  • Average rainfall in April: 153mm

The wettest month (with the highest rainfall) is October (251mm).
The driest month (with the least rainfall) is May (105mm).

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Average rainfall days in April
Juneau, AK

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 least rainy days is February (4.8 days).

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Average snowfall in April
Juneau, AK

Average snowfall in April - Juneau, AK
  • Average snowfall in April: 748mm

The month with the highest snowfall is December (1595mm).
Months with the least snowfall are June, July, August and September (0mm).

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Average snowfall days in April
Juneau, AK

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 least snowfall days are June, July, August and September (0 days).

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Average sea temperature in April
Juneau, AK

Average sea temperature in April - Juneau, AK
  • Average sea temperature in April: 5.2°C

The best month for swimming (with the highest average sea temperature) is August (11.9°C).
The coldest month (with the lowest average sea temperature) is March (4.7°C).

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Average daylight in April /
Average sunshine in April
Juneau, AK

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 the shortest days is December (Average daylight: 6.5h).

  • Average sunshine in April: 5.1h

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

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Average sunshine days in April
Juneau, AK

Average sunshine days in April - Juneau, AK
  • Average sunshine days in April: 7.5 days

The month with the most sunshine days is May (10 days).
The month with the least sunshine days is November (6.1 days).

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Average UV index in April
Juneau, AK

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).

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Average cloud cover in April
Juneau, AK

Average cloud cover in April - Juneau, AK
  • Average cloud cover in April: 68

Months with the most cloud cover are January and November (Cloud cover 72).
The month with the least cloud cover is May (Cloud cover 61).

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Average visibility in April
Juneau, AK

Average visibility in April - Juneau, AK
  • Average visibility in April: 6km

Months with the highest visibility are February, March, May, June, July, August, September, October and November (7km).
Months with the lowest visibility are January, April and December (6km).

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