The highest day temperature in December 2025 was 31°F. The lowest night temperature was -12°F. The average values for day and night temperatures during December were 4.2°F и 1.5°F respectivly.

The average sea surface temperature in December 2025 for Anchorage was 33.6°F. The maximum and minimum values were 32.2°F and 34.6°F respectively.

Most of the days in December are gloomy but you can also expect sunny days.

Precipitation total in December for Anchorage is 0.6 in.

The average wind speed in December is 5.1 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Anchorage in December is 2.4 hours.