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 is a chilly spring month in Juneau, Alaska, with temperature in the range of an average high of 48.4°F (9.1°C) and an average low of 33.3°F (0.7°C).

Temperature

In April, the average high-temperature is 48.4°F (9.1°C), and the average low-temperature is 33.3°F (0.7°C).

Humidity

In Juneau, the average relative humidity is 76.8%.

Rainfall

April is the month with the least rainfall. Rain falls for 17 days and accumulates 2.9" (74.7mm) of precipitation.

Snowfall

January through April, October through December are months with snowfall.

Ocean temperature

In Juneau, the average seawater temperature in April is 41.4°F (5.2°C). 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

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

Sunshine

In Juneau, the average sunshine is 6.1h.

UV index

In Juneau, the average daily maximum UV index in April is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to the UV radiation for the average person.
The average daily UV index of 3 transform into the following instructions:
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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in April in Juneau?

The average high-temperature, in April, in Juneau, Alaska, is 48.4°F (9.1°C), while the average low-temperature is 33.3°F (0.7°C).

What is the average humidity in April in Juneau?

In April, the average relative humidity in Juneau, Alaska, is 76.8%.

How many days does it rain in April in Juneau?

In April, the rain falls for 17 days. Throughout April, 2.9" (74.7mm) of precipitation is accumulated.

What is the driest month in Juneau?

April is the month with the least rainfall in Juneau, Alaska. Rain falls for 17 days and accumulates 2.9" (74.7mm) of precipitation.

What is the last month it snows in Juneau?

April is the last month it regularly snows. During 1.3 snowfall days, in April, Juneau aggregates 1.1" (27.9mm) of snow.

What is the water temperature in April in Juneau?

In Juneau, Alaska, the average seawater temperature in April is 41.4°F (5.2°C). 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.

What is the average length of the day in April in Juneau?

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 is 6.1h.

What is the UV index intensity in April in Juneau?

In April, the average daily maximum UV index in Juneau, Alaska, is 3. A UV Index of 3 to 5 symbolizes a moderate vulnerability from the exposure to the Sun's UV radiation.
Average temperature in April - Juneau, AK
  • Average high temperature in April: 48.4°F

The warmest month (with the highest average high temperature) is July (63.9°F).
The month with the lowest average high temperature is January (32.8°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: 76.8%

The month with the highest relative humidity is September (87.9%).
The month with the lowest relative humidity is May (76.3%).

Average rainfall in April - Juneau, AK
  • Average rainfall in April: 2.9"

Wettest months (with the highest rainfall) are September and October (8.6").
The driest month (with the lowest rainfall) is April (2.9").

Average rainfall days in April - Juneau, AK
  • Average rainfall days in April: 17 days

The month with the highest number of rainy days is October (23.9 days).
The month with the lowest number of rainy days is June (15.8 days).

Average snowfall in April - Juneau, AK
  • Average snowfall in April: 1.1"

The month with the highest snowfall is January (27.7").
Months with the lowest snowfall are May, June, July, August and September (0").

Average snowfall days in April - Juneau, AK
  • Average snowfall days in April: 1.3 days

The month with the highest number of snowfall days is January (10.6 days).
Months with the lowest number of snowfall days are May, 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: 6.1h

The month with most sunshine is May (Average sunshine: 7.5h).
The month with least sunshine is December (Average sunshine: 1.3h).

Average UV index in April - Juneau, AK
  • Average UV index in April: 3

Months with the highest UV index are June and July (UV index 5).
Months with the lowest UV index are January, November and December (UV index 0).

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