Sudbury Snowfall Totals & Accumulation Averages





This page pulls together information on when, how much and how often Sudbury, Ontario has snow.

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

All the numbers are long-term historical averages based on weather data gathered from 1981 to 2010 at the Greater Sudbury Airport.

How Often it Snows in Sudbury

This first table lists monthly and yearly totals for amount of snow and how many days it snows at least 0.2 centimetres (0.08 inches).

Average total snowfall and days with fresh snow in Sudbury
Days   Inches Centi­metres
17.2 January 23.4 60
13.4 February 20.4 52
9.6 March 13.7 35
4.9 April 6.6 17
0.9 May 0.8 2
0.1 September 0.0 0
2.9 October 2.2 6
9.7 November 11.7 30
16.3 December 24.8 63
74.9 Year 103.7 263

When Sudbury Has Its First & Last Snowfalls

The first snow of the season for Sudbury usually arrives in October, but a light snowfall can show up as early as September.

The season's last snowfall typically happens in April although in some years a late snow lands in May or even June.

Sudbury is normally free of snow every year during July and August.

How Many Snowstorms Sudbury Gets

Most days of snowfall in Sudbury leave less than five centimetres (2 inches), of fresh snow on the ground. For 18 days a year on average, the amount of new snow totals at least five cm.

Big snowstorms of over ten cm a day normally occur about six times a year. But major blizzards that dump 25 cm or more in one day are rare events that don't happen every year.

Number of days per month and year on average in Sudbury with a total snowfall of at least 5, 10 or 20 centimetres
  5 cm
2.0 inches
10 cm
3.9 inches
25 cm
9.8 inches
January 3.9 1.3 0.1
February 3.5 1.1 0.1
March 2.3 0.7 0.1
April 1.2 0.3 0.0
May 0.1 0.0 0.0
October 0.3 0.1 0.0
November 2.0 0.5 0.1
December 4.1 1.7 0.0
Year 17.5 5.7 0.4

How Much Snow Normally Accumulates in Sudbury

For about 136 days, or over one-third of a year, Sudbury has at least a centimetre of snow on the ground. In mid-winter the snowpack averages 36 cm deep.

Generally the snow cover begins to build in December and remains deep through most of January to mid March. By the end of April the snow is usually gone.

Average total days per month and year in Sudbury with snow depth of at least 1, 5, 10 or 20 cm on the ground
1 cm
0.4 inches
5 cm
2.0 inches
  10 cm
3.9 inches
20 cm
7.9 inches
30.8 29.9 January 28.2 20.5
28.1 28.0 February 26.8 22.7
27.9 25.6 March 22.0 17.0
9.0 5.0 April 2.2 0.6
0.3 0.1 May 0.0 0.0
0.8 0.2 October 0.0 0.0
11.0 5.8 November 3.2 1.1
27.6 24.0 December 19.5 10.7
135.6 118.5 Year 102.0 72.5
Reference

Environment Canada. Meteorological Service of Canada. Canadian Climate Normals. 1981-2010 Climate Normals & Averages.

Environment Canada. National Climate Data and Information Archive. Canadian Climate Normals or Averages 1971-2000.

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