Anchorage Snowfall Totals & Accumulation Averages





This page pulls together information on when, how much and how often Anchorage, Alaska has snow.

There are data and descriptions here of how many days it snows and the total amount of snowfall that Anchorage usually gets. There are also monthly and yearly counts of the days that the northern city normally has heavy snowstorms and deep snow accumulated on the ground. Plus there's information on when Anchorage can expect the first and last snowfalls of the season.

The first set of monthly snow totals are averages for 2010 to 2019. All the other numbers are long-term historical averages based on weather data gathered from 1991 to 2020 at the Anchorage International Airport.

How Often it Snows in Anchorage

The next two tables list monthly and yearly totals for amount of snow and how many days it snows at least 0.1 inches (0.25 centimetres).

10-year snowfall averages in Anchorage, 2010 to 2019
Days   Inches Centi­metres
3.5 January 12.6 32.0
4.2 February 13.9 35.3
2.5 March 8.7 22.2
1.6 April 5.4 13.6
0.0 May 0.1 0.3
0.1 September 0.3 0.8
0.6 October 1.7 4.4
3.6 November 10.8 27.3
5.0 December 16.6 42.3
21.4 Year 71.9 182.5
30-year snowfall averages in Anchorage, 1991 to 2020
Days   Inches Centi­metres
8.8 January 12.4 31.5
7.8 February 13.4 34.0
6.1 March 11.0 27.9
2.5 April 4.0 10.2
0.3 May 0.3 0.8
0.3 September 0.4 1.0
3.2 October 5.6 14.2
7.7 November 12.6 32.0
10.8 December 18.2 46.2
47.5 Year 77.9 197.9

These averages don't show how much the snowfall in Anchorage varies from year to year.

In December, for instance, one in four years has over 26.3 inches of snow. Another 25 percent of years receive less than 9.2 inches for the month.

Similarly in January, fresh snowfall in the heaviest years amounts to over 14.5 inches, while the lightest years get less than 6.9 inches.

New snow for February ranges from over 18.3 inches in heavy snowfall years to under 5.5 inches in light years.

When Anchorage Has Its First & Last Snowfalls

The first snowfall of winter for Anchorage usually arrives in October. In rare years, it starts snowing in September.

The season's last snowfall typically happens in April. Occasionally May also gets at least a dusting of snow.

Anchorage is normally free of snow every year from June to August.

How Many Snowstorms Anchorage Gets

Most days of snowfall in Anchorage leave less than an inch of fresh snow on the ground. For 22 days a year on average, the amount of new snow totals at least an inch.

Snowstorms of over five inches a day normally occur three or four times a year. But major blizzards that dump ten inches or more in one day are rare events that don't happen every year.

Number of days per month and year on average in Anchorage with a total snowfall of at least 1, 3, 5 or 10 inches
1 inch
2.5 cm
3 inches
7.6 cm
  5 inches
12.7 cm
10 inches
25.4 cm
3.6 1.4 January 0.5 0.1
3.5 1.5 February 0.6 0.0
2.9 1.2 March 0.5 0.1
1.2 0.4 April 0.2 0.0
0.1 0.1 September 0.0 0.0
1.5 0.6 October 0.3 0.0
4.0 1.3 November 0.6 0.0
5.0 2.1 December 0.9 0.1
21.8 8.6 Year 3.6 0.3

How Much Snow Normally Accumulates in Anchorage

For most of winter, Anchorage has at least five inches of snow on the ground.

Snow mostly accumulates during December to March. Typically, on at least half the days in those months, the snow covering Anchorage amounts to ten or more inches deep. The snow amounts to 20 inches or more deep on an average of 26 days a year.

Average total days per month and year in Anchorage with snow depth of at least 1, 3, 5 or 10 inches on the ground
1 inch
2.5 cm
3 inches
7.6 cm
  5 inches
12.7 cm
10 inches
25.4 cm
30.5 28.5 January 25.9 18.4
26.9 25.4 February 25.1 20.9
28.6 27.4 March 27.0 22.6
13.9 12.0 April 10.5 7.1
0.2 0.0 May 0.0 0.0
0.1 0.0 September 0.0 0.0
5.4 3.1 October 1.9 0.6
20.6 16.1 November 11.4 3.9
28.1 25.6 December 22.9 12.5
154.3 138.1 Year 124.7 86.0
References

Jay Lawrimore, Ron Ray, Scott Applequist, Bryant Korzeniewski, Matthew Menne. 2016. Global Summary of the Month and Year, Version 1.0. NOAA National Centers for Environmental Information.

NOAA National Centers for Environmental Information (NCEI). Climate Normals.

Anchorage Weather
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