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

March 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
The first month of the spring, March, is still a cold month in Juneau, Alaska, with average temperature fluctuating between 28°F (-2.2°C) and 39.6°F (4.2°C).

Temperature

In March, the average high-temperature is relatively the same as in February - a still cold 39.6°F (4.2°C). In Juneau, Alaska, the average low-temperature is 28°F (-2.2°C).

Humidity

In March, the average relative humidity in Juneau is 79.4%.

Rainfall

In Juneau, in March, during 18.9 rainfall days, 3.8" (96mm) of precipitation is typically accumulated. Throughout the year, in Juneau, there are 229.8 rainfall days, and 62.3" (1581.6mm) of precipitation is accumulated.

Snowfall

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

Ocean temperature

The month with the coldest seawater is March, with an average ocean temperature of 40.5°F (4.7°C). For swimming, this is considered extremely cold, dangerous, and life-threatening. Unless suitably protected with insulated waterproof clothing, hypothermia quickly occurs.

Daylight

In March, the average length of the day is 11.9h.

Sunshine

The average sunshine in March is 4.4h.

UV index

The average daily maximum UV index in March is 2. A UV Index value of 2, and less, symbolizes a low health risk from the exposure to the Sun's UV rays for ordinary individuals.
The daily maximum UV index of 2 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. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in March in Juneau?

In Juneau, in March, the average high-temperature is 39.6°F (4.2°C), and the average low-temperature is 28°F (-2.2°C).

What is the average humidity in March in Juneau?

The average relative humidity in March in Juneau, Alaska, is 79.4%.

How many days does it rain in March in Juneau?

In Juneau, in March, during 18.9 rainfall days, 3.8" (96mm) of precipitation is typically accumulated.

How many days does it snow in March in Juneau?

In March, it is snowing for 6.8 days. Throughout March, 11.6" (294.6mm) of snow is accumulated.

When is the ocean coldest in Juneau?

With an average ocean temperature of 40.5°F (4.7°C), March is the month with the coldest seawater. For swimming, this is considered extremely cold, dangerous, and life-threatening. Unless suitably protected with insulated waterproof clothing, hypothermia quickly occurs.

What is the ocean temperature in March in Juneau?

In March, the average ocean temperature is 40.5°F (4.7°C). For swimming, this is considered life-threatening and very dangerous. The water feels painfully cold, and hyperventilation quickly occurs. A specialized swimsuit is mandatory to reduce thermal damage.

How many hours of daylight does Juneau have in March?

In Juneau, Alaska, the average length of the day in March is 11.9h.

How many hours of sunshine does Juneau have in March?

The average sunshine in March is 4.4h.

How high is the UV index in March in Juneau?

In March, the average daily maximum UV index in Juneau is 2. 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 March - Juneau, AK
  • Average high temperature in March: 4.2°C

The warmest month (with the highest average high temperature) is July (17.7°C).
The month with the lowest average high temperature is January (0.4°C).

  • Average low temperature in March: -2.2°C

The month with the highest average low temperature is July (10°C).
The coldest month (with the lowest average low temperature) is January (-4.6°C).

Average humidity in March - Juneau, AK
  • Average humidity in March: 79.4%

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 March - Juneau, AK
  • Average rainfall in March: 96mm

The wettest month (with the highest rainfall) is September (219.5mm).
The driest month (with the lowest rainfall) is April (74.7mm).

Average rainfall days in March - Juneau, AK
  • Average rainfall days in March: 18.9 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 March - Juneau, AK
  • Average snowfall in March: 294.6mm

The month with the highest snowfall is January (703.6mm).
Months with the lowest snowfall are May, June, July, August and September (0mm).

Average snowfall days in March - Juneau, AK
  • Average snowfall days in March: 6.8 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 March - Juneau, AK
  • Average sea temperature in March: 4.7°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).

Average daylight in March / Average sunshine in March - Juneau, AK
  • Average daylight in March: 11.9h

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 March: 4.4h

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 March - Juneau, AK
  • Average UV index in March: 2

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).