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 another cold winter month, with average temperature varying between 36.9°F (2.7°C) and 28°F (-2.2°C).

Temperature

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

Rainfall

In Unalaska, Alaska, during January, the rain falls for 21 days and regularly aggregates up to 7.3" (184.9mm) of 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 in Unalaska are January through May, October through December. The month with the most snowfall is January when 23.8" (604.5mm) of snow is typically aggregated.

Ocean temperature

In Unalaska, the average water temperature is 39.6°F (4.2°C). For swimming, this is considered extremely cold, dangerous, and life-threatening. Unless suitably protected with insulated waterproof clothing, hypothermia quickly occurs.

Daylight

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

Sunshine

The average sunshine in January is 6h.

UV index

Months with the lowest UV index are January and December, with an average maximum UV index of 0. A UV Index estimate of 2, and below, represents a low threat to health from unprotected exposure to the Sun's UV rays for average individuals.
The daily maximum UV index of 0 in January 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. 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 coldest month in Unalaska?

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 in Unalaska, Alaska.

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 much does it rain in Unalaska in January?

In Unalaska, Alaska, during January, the rain falls for 21 days and regularly aggregates up to 7.3" (184.9mm) of precipitation.

How much does it snow in Unalaska in January?

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

When does it snow the most in Unalaska?

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

How cold is the water in January in Unalaska?

In Unalaska, Alaska, in January, the average water temperature is 39.6°F (4.2°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 Unalaska have in January?

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

How long on average sun shines in January in Unalaska?

The average sunshine in January in Unalaska is 6h.

What are the months 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.

What is the UV index intensity in January in Unalaska?

The average daily maximum UV index in January is 0. A UV Index reading 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).