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

March weather forecast and climate
Unalaska, AK

The first month of the spring, March, is also a wintry month in Unalaska, Alaska, with average temperature ranging between min 28.2°F (-2.1°C) and max 38.7°F (3.7°C).

Temperature

In Unalaska, Alaska, the average high-temperature is essentially the same as in February - a still cold 38.7°F (3.7°C). In Unalaska, in March, the average low-temperature is 28.2°F (-2.1°C).

Rainfall

In Unalaska, it is raining for 20 days, with typically 5.4" (137.2mm) of accumulated precipitation. In Unalaska, during the entire year, the rain falls for 223 days and collects up to 60.9" (1545.8mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. Throughout March, 16.5" (419.1mm) of snow is accumulated. In Unalaska, during the entire year, snow aggregates up to 91.5" (2324.1mm).

Ocean temperature

February and March, with an average ocean temperature of 38.8°F (3.8°C), are months with the coldest seawater in Unalaska, Alaska.
Note: 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.

Daylight

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

Sunshine

The average sunshine in March is 7h.

UV index

In March, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a low threat to health from the exposure to the Sun's UV rays for the ordinary person.
Note: In March, the average maximum UV index of 2 translate into the following recommendations:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to 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. 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 March in Unalaska?

In March, the average high-temperature is 38.7°F (3.7°C), and the average low-temperature is 28.2°F (-2.1°C).

How much does it rain in Unalaska in March?

In Unalaska, in March, it is raining for 20 days, with typically 5.4" (137.2mm) of accumulated precipitation.

How much does it snow in Unalaska in March?

During March, Unalaska regularly aggregates up to 16.5" (419.1mm) of snow.

When is the ocean coldest in Unalaska?

Months with the coldest seawater in Unalaska are February and March, with an average ocean temperature of 38.8°F (3.8°C).

What is the water temperature in March in Unalaska?

In Unalaska, in March, the average water temperature is 38.8°F (3.8°C). For swimming, this is considered extremely cold, dangerous, and life-threatening. Unless suitably protected with insulated waterproof clothing, hypothermia quickly occurs.

How many hours of daylight does Unalaska have in March?

The average length of the day in March is 11.9h.

How many hours of sunshine does Unalaska have in March?

In Unalaska, Alaska, the average sunshine in March is 7h.

What is the UV index intensity in March in Unalaska?

The average daily maximum UV index in March is 2. A UV Index estimate of 2, and below, represents a minimal hazard to health from unprotected exposure to the UV radiation.
Average temperature in March - Unalaska, AK
  • Average high temperature in March: 38.6°F

The warmest month (with the highest average high temperature) is August (58.9°F).
The month with the lowest average high temperature is January (36.8°F).

  • Average low temperature in March: 28.3°F

The month with the highest average low temperature is August (47.7°F).
The coldest month (with the lowest average low temperature) is February (27.6°F).

Average rainfall in March - Unalaska, AK
  • Average rainfall in March: 5.4"

The wettest month (with the highest rainfall) is December (7.9").
The driest month (with the lowest rainfall) is July (2.2").

Average rainfall days in March - Unalaska, AK
  • Average rainfall days in March: 20 days

Months with the highest number of rainy days are October, November and December (23 days).
The month with the lowest number of rainy days is July (13 days).

Average snowfall in March - Unalaska, AK
  • Average snowfall in March: 16.5"

The month with the highest snowfall is January (23.8").
Months with the lowest snowfall are June, July, August and September (0").

Average sea temperature in March - Unalaska, AK
  • Average sea temperature in March: 38.9°F

The best month for swimming (with the highest average sea temperature) is August (50.1°F).
The coldest month (with the lowest average sea temperature) is February (38.8°F).

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

The month with the longest days is June (Average daylight: 17h).
The month with shortest days is December (Average daylight: 7.5h).

  • Average sunshine in March: 7h

Months with most sunshine are May and June (Average sunshine: 8h).
Months with least sunshine are November and December (Average sunshine: 5).

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

The month with the highest UV index is July (UV index 6).
Months with the lowest UV index are January and December (UV index 0).