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

January weather forecast and climate
Unalaska, AK

January, like December, in Unalaska, Alaska, is a wintry winter month, with temperature in the range of an average low of 28°F (-2.2°C) and an average high of 36.9°F (2.7°C).

Temperature

With an average high-temperature of 36.9°F (2.7°C) and an average low-temperature of 28°F (-2.2°C), January is the coldest month.

Rainfall

In January, in Unalaska, the rain falls for 21 days. Throughout January, 7.3" (184.9mm) of precipitation is accumulated. 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. January is the month with the most snowfall in Unalaska, Alaska, with 23.8" (604.5mm) of accumulated snow.

Ocean temperature

In Unalaska, the average water temperature is 39.6°F (4.2°C).
Note: 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.

Daylight

In January, the average length of the day is 8.1h.

Sunshine

In Unalaska, the average sunshine is 6h.

UV index

January and December, with an average maximum UV index of 0, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to the UV radiation for the average person.
Note: The daily maximum UV index of 0 interpret into the following advice:
People with sensitive skin, children, and babies should always be protected from prolonged 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. 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 coldest month in Unalaska?

The coldest month in Unalaska, Alaska, is January, with an average high-temperature of 36.9°F (2.7°C) and an average low-temperature of 28°F (-2.2°C).

What is the temperature in January in Unalaska?

In Unalaska, Alaska, in January, the average high-temperature is 36.9°F (2.7°C), and the average low-temperature is 28°F (-2.2°C).

How many days does it rain in January in Unalaska?

In Unalaska, Alaska, in January, it is raining for 21 days, with typically 7.3" (184.9mm) of accumulated precipitation.

How much does it snow in Unalaska in January?

During January, Unalaska regularly aggregates up to 23.8" (604.5mm) of snow.

What is the snowiest month in Unalaska?

The month with the most snowfall in Unalaska is January when 23.8" (604.5mm) of snow is typically aggregated.

How cold is the water in January in Unalaska?

In January, the average ocean temperature in Unalaska is 39.6°F (4.2°C). 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.

What is the average length of the day in January in Unalaska?

The average length of the day in January in Unalaska is 8.1h.

How many hours of sunshine does Unalaska have in January?

The average sunshine in January in Unalaska is 6h.

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

Months with the lowest UV index are January and December, with an average maximum UV index of 0.

How high is the UV index in January in Unalaska?

In January, the average daily maximum UV index is 0. A UV Index estimate of 2, and below, represents a low health risk from the exposure to the Sun's UV rays.
Average temperature in January - Unalaska, AK
  • Average high temperature in January: 36.8°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 January: 28.1°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 January - Unalaska, AK
  • Average rainfall in January: 7.3"

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 January - Unalaska, AK
  • Average rainfall days in January: 21 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 January - Unalaska, AK
  • Average snowfall in January: 23.8"

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 January - Unalaska, AK
  • Average sea temperature in January: 39.5°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 January / Average sunshine in January - Unalaska, AK
  • Average daylight in January: 8.1h

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 January: 6h

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 January - Unalaska, AK
  • Average UV index in January: 0

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).