Calgary Snowfall Totals & Accumulation Averages

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This page pulls together information on when, how much and how often Calgary, Alberta has snow.

There are data and descriptions here of how many days it snows and the total amount of snowfall that Calgary usually gets. There are also monthly and yearly counts of the days that Calgary 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 Calgary International Airport.

How Often it Snows in Calgary

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 Calgary
Days   Inches Centimetres
  7.7 January   6.0   15
  7.4 February   5.7   15
  9.5 March   8.9   23
  6.4 April   7.4   19
  2.6 May   4.7   12
  0.1 June   0.1     0
  0.1 August   0.0     0
  1.3 September   1.5     4
  4.1 October   3.9   10
  7.4 November   6.5   17
  7.7 December   5.9   15
54.2 Year 50.7 129

When Calgary Has Its First & Last Snowfalls

The first snowfall of autumn for Calgary usually arrives in September or October. The season's last snowfall typically happens in April or May. But in some years there is no start or stop to the snow season as it can snow any month of the year in Calgary.

How Many Snowstorms Calgary Gets

Most days of snowfall in Calgary leave less than five centimetres (2 inches) of fresh snow on the ground. For seven 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 once or twice a year. But major blizzards that dump 25 cm or more in one day are rare events that happen about once a decade. Storms this severe are most likely to appear in May.

Number of days per month and year on average in Calgary 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 0.5 0.2 0.0
February 0.6 0.1 0.0
March 1.5 0.3 0.0
April 1.0 0.3 0.0
May 0.7 0.3 0.1
September 0.3 0.0 0.0
October 0.6 0.2 0.0
November 1.1 0.2 0.0
December 0.7 0.1 0.0
Year 6.9 1.7 0.1

How Much Snow Normally Accumulates in Calgary

For about 86 days, or one-quarter of the year, Calgary has at least a centimetre of snow on the ground. In mid-winter the snowpack averages around three cm deep.

Average total days per month and year in Calgary 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
18.9   8.6 January   4.3 1.0
16.3   7.4 February   2.5 0.0
12.6   7.0 March   2.1 0.3
  4.4   2.0 April   0.8 0.1
  1.4   0.8 May   0.2 0.1
  0.3   0.0 September   0.0 0.0
  3.1   1.4 October   0.3 0.0
11.6   5.6 November   1.6 0.2
17.0   8.0 December   4.6 0.9
85.6 40.9 Year 16.3 2.6
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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