Anchorage Weather in October

With most nights dropping below freezing, the first snowfalls of the season normally arrive in October at Anchorage, Alaska. This is often the last until spring of temperatures as warm as 50 degrees Fahrenheit (10 degrees Celsius).

This page gives detailed information on the typical October temperature, precipitation, snow, sun, humidity, wind and storms for Anchorage. The numbers here are historical averages based on climate data gathered at the Ted Stevens Anchorage International Airport, located a few miles from downtown Anchorage.

Temperature Weather iconTemperature

42 °F October average high 6 °C
31 °F October average low -1 °C
20 days 40 °F max. or more (4 °C)
18 days 32 °F min. or less (0 °C)

Anchorage averages 6 days this month when the thermometer reaches into the 50s Fahrenheit (over 10 °C). Temperatures above 60 °F (16 °C) rarely occur here during October. Typically 4 days this month stay entirely below freezing.

The temperature dips to 20 °F (-8 °C) or below on an average of 4 nights. But October does not normally get as cold as 0 °F (-18 °C).

Rainy Weather iconPrecipitation

1.8 in total precipitation 46 mm
12 days of rain or snowfall

Half the time, Anchorage receives 1.2 to 2.5 inches (31 to 64 mm) of precipitation in October. One in four years has drier weather, while another one in four is wetter.

Snowy Weather iconSnow

5.6 in total snowfall 14.2 cm
3 days with new snow

October's snowfall varies a lot from year to year in Anchorage. Between 0.5 and 8.7 inches (1 to 22 cm) of fresh snow arrives in half the years. Less new snow lands in one out of four Octobers, while another twenty-five percent are snowier.

Anchorage typically has at least an inch (2.5 cm) of snow on the ground for 5 days this month. The snow normally accumulates to 5 inches (13 cm) or deeper on 2 days.

Sunny Weather iconSun

36 % sunshine
5 days clear skies

The sun's rays reach the ground in Anchorage during 36 percent of daylight hours on average in October, for a total of 111 hours in the month. Typically on 5 days this month the sky is mainly clear, with at most 30 percent cloud cover.

Sunlight in October at Anchorage lasts for 9 hours and 57 minutes a day on average. The longest day of the month is the 1st with 11 hours and 23 minutes of daylight. By the end of the month, the days have shortened to 8:34 from sunrise to sunset. These durations can vary by a minute or three from year to year.

Humid Weather iconHumidity

75 % October average humidity

The relative humidity in Anchorage during October usually peaks at 79 percent in the morning then drops to 67 percent by mid afternoon.

Local Time12 am3 am6 am9 am12 pm3 pm6 pm9 pm
Humidity % 77 78 79 79 71 67 72 76

Windy Weather iconWind

6.7 mph October wind speed average 10.8 kph

October is a little less windy than most other months in Anchorage.

Stormy Weather iconStorms

1 day snowfall of 3 inches (8 cm) or more
0 days with thunderstorms in October

The weather data here are long-term averages provided by the US National Centers for Environmental Information (NCEI). Temperature and precipitation are 1991-2020 normals while humidity and thunderstorms are 1961-1990 normals.

Anchorage Weather
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