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

October weather forecast and climate
Unalaska, AK

October, like September, is another chilly autumn month in Unalaska, Alaska, with average temperature varying between 47.3°F (8.5°C) and 37.2°F (2.9°C).

Temperature

In Unalaska, Alaska, the average high-temperature marginally drops, from a cool 54°F (12.2°C) in September, to a chilly 47.3°F (8.5°C). In Unalaska, in October, the average low-temperature is 37.2°F (2.9°C).

Rainfall

In Unalaska, during October, the rain falls for 23 days and regularly aggregates up to 7.2" (182.1mm) of precipitation. Throughout the year, there are 223 rainfall days, and 60.9" (1545.8mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Unalaska, Alaska, are January through May, October through December. October is the first month it typically snows in Unalaska, Alaska. Throughout October, Unalaska receives 0.5" (12.7mm) of snow. In Unalaska, during the entire year, snow aggregates up to 91.5" (2324.1mm).

Ocean temperature

In October, the average ocean temperature is 46°F (7.8°C).
Note: Swimming in 46°F (7.8°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

Daylight

In October, the average length of the day is 10.5h.

Sunshine

In October, the average sunshine is 6h.

UV index

In October, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a low threat to health from unsafe exposure to the UV radiation for ordinary individuals.
Note: The average daily UV index of 2 in October transform into the following instructions:
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. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the temperature in October in Unalaska?

The average high-temperature, in October, is 47.3°F (8.5°C), while the average low-temperature is 37.2°F (2.9°C).

How much does it rain in Unalaska in October?

In Unalaska, Alaska, in October, it is raining for 23 days, with typically 7.2" (182.1mm) of accumulated precipitation.

When does it start to snow in Unalaska?

October is the first month it typically snows in Unalaska. Throughout October, Unalaska receives 0.5" (12.7mm) of snow.

What is the ocean temperature in October in Unalaska?

In Unalaska, in October, the average water temperature is 46°F (7.8°C). Swimming in 46°F (7.8°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

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

In Unalaska, Alaska, the average length of the day in October is 10.5h.

How long on average sun shines in October in Unalaska?

The average sunshine in October is 6h.

What is the UV index intensity in October in Unalaska?

In October, the average daily maximum UV index in Unalaska is 2. A UV Index of 2, and less, symbolizes a low health threat from the exposure to the Sun's UV radiation.
Average temperature in October - Unalaska, AK
  • Average high temperature in October: 47.3°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 October: 37.2°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 October - Unalaska, AK
  • Average rainfall in October: 7.2"

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 October - Unalaska, AK
  • Average rainfall days in October: 23 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 October - Unalaska, AK
  • Average snowfall in October: 0.5"

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 October - Unalaska, AK
  • Average sea temperature in October: 46°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 October / Average sunshine in October - Unalaska, AK
  • Average daylight in October: 10.5h

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 October: 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 October - Unalaska, AK
  • Average UV index in October: 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).