Green Bay Snowfall Totals & Accumulation Averages

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This page pulls together information on when, how much and how often Green Bay, Wisconsin has snow.

There are data and descriptions here of how many days it snows and the total amount of snowfall that Green Bay 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 Green Bay 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 Green Bay's Austin Straubel International Airport.

How Often it Snows in Green Bay

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 Green Bay
Days   Inches Centimetres
  9.6 January 13.0   33.0
  7.8 February   9.9   25.1
  6.9 March   8.1   20.6
  2.5 April   2.9     7.4
  0.1 May   0.2     0.5
  0.3 October   0.2     0.5
  3.8 November   4.0   10.2
  9.2 December 13.1   33.3
40.2 Year 51.4 130.6

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

In December, for instance, one in four years totals over 19.4 inches of snow. Another 25 percent of years receive less than 5.3 inches for the month.

Similarly in January, fresh snowfall in the heaviest years amounts to over 17.1 inches, while the lightest years get less than 7.9 inches.

New snow for February ranges from over 15.4 inches in heavy snowfall years to under 7 inches in light years.

When Green Bay Has Its First & Last Snowfalls

The first snowfall of winter for Green Bay usually arrives in November, although sometimes October gets snow.

The season's last snowfall typically happens in April. Very rarely a few snowflakes fall in May.

Green Bay is normally free of snow every year from June to September.

How Many Snowstorms Green Bay Gets

Most days of snowfall in Green Bay leave just a skiff, amounting to less than an inch, of fresh snow on the ground. For 16 days a year on average, the amount of new snow totals at least an inch.

Snowstorms of over five inches a day normally occur once or twice year. But major blizzards that dump ten inches or more in one day are rare events.

Number of days per month and year on average in Green Bay 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
  4.1 1.6 January 0.5 0.0
  3.1 1.0 February 0.4 0.0
  2.6 0.7 March 0.3 0.1
  1.1 0.3 April 0.0 0.0
  0.1 0.0 October 0.0 0.0
  1.1 0.3 November 0.1 0.0
  3.7 1.3 December 0.5 0.1
15.8 5.2 Year 1.8 0.2

How Much Snow Normally Accumulates in Green Bay

On nearly three-quarters of winter days, Green Bay has at least an inch of snow on the ground.

Snow mostly accumulates during January and February. Typically, on five days in January and in February, plus another two or three in December and in March, the snow covering Green Bay gets to ten or more inches deep.

Average total days per month and year in Green Bay 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
25.3 20.7 January 16.8   5.3
22.9 17.9 February 13.7   4.9
12.5   6.5 March   4.7   1.7
  1.7   0.4 April   0.1   0.0
  0.1   0.0 October   0.0   0.0
  3.1   1.2 November   0.4   0.1
18.1 11.8 December   9.1   3.0
83.8 58.5 Year 44.8 15.0
Reference

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

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