Ann Arbor Snowfall Totals & Accumulation Averages

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This page pulls together information on when, how much and how often Ann Arbor, Michigan has snow.

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

All the numbers are averages, based on climate data gathered from 1981 to 2010 at the University of Michigan's North Campus in Ann Arbor.

How Often it Snows in Ann Arbor

This first table lists monthly and yearly totals for amount of snow and how many days it snows at least 0.1 inches (0.25 centimetres).

Average total snowfall and days with fresh snow in Ann Arbor
Days   Inches Centimetres
14.5 January 16.4   41.7
11.3 February 13.0   33.0
  7.8 March   8.5   21.6
  2.4 April   2.7     6.9
  0.5 October   0.2     0.5
  4.4 November   3.1     7.9
12.1 December 13.4   34.0
53.0 Year 57.3 145.5

These averages don't show how much Ann Arbor's snowfall varies from year to year.

In December, for instance, one in four years totals over 16.2 inches of snow. Another 25 percent of years receive less than 7.9 inches for the month.

Similarly in January, fresh snowfall in the heaviest years amounts to over 23.2 inches, while the lightest years get less than 10.4 inches.

Snow in February ranges from over 17.1 inches in heavy snowfall years to under 8.5 inches in light years.

When Ann Arbor Has Its First & Last Snowfalls

Ann Arbor's first snowfall of winter usually arrives in November. But about once every three or four years, the city gets at least a dusting of snow in October.

The season's last snowfall typically happens in April.

Ann Arbor is normally free of snow every year from May to September.

How Many Snowstorms Ann Arbor Gets

Most days of snowfall in Ann Arbor result in just a skiff of less than an inch of fresh snow left on the ground. For 18 days a year on average, the amount of new snow totals at least an inch.

Snowstorms of over five inches a day normally occur a couple times a year. But major blizzards that dump ten inches or more in one day are rare events. Snowstorms this severe happen about once a decade, usually in January.

Number of days per month and year on average in Ann Arbor 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
  5.2 1.4 January 0.5 0.1
  4.1 1.2 February 0.5 0.0
  2.4 0.7 March 0.4 0.0
  0.6 0.2 April 0.2 0.0
  0.1 0.0 October 0.0 0.0
  1.0 0.1 November 0.0 0.0
  4.2 1.0 December 0.5 0.0
17.6 4.6 Year 2.1 0.1

How Much Snow Normally Accumulates in Ann Arbor

For over half of winter days, Ann Arbor has at least an inch of snow on the ground.

Snow mostly accumulates during January. Typically, on three days in January and another two in February, the snow covering Ann Arbor gets to ten or more inches deep.

Average total days per month and year in Ann Arbor 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
21.2 15.5 January 11.2 3.0
17.1 12.8 February   8.2 2.0
  6.6   3.9 March   2.0 0.4
  0.6   0.4 April   0.1 0.0
  1.3   0.4 November   0.0 0.0
13.1   6.7 December   3.8 0.7
59.9 39.7 Year 25.3 6.1
Reference

National Climatic Data Center. NOAA's 1981-2010 Climate Normals.

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