Allentown & Bethlehem Snowfall Totals & Accumulation Averages

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This page pulls together information on when, how much and how often Allentown and Bethlehem, Pennsylvania have snow.

There are data and descriptions here of how many days it snows and the total amount of snowfall that Allentown and Bethlehem usually get. There are also monthly and yearly counts of the days that the cities normally have heavy snowstorms and deep snow accumulated on the ground. Plus there's information on when the Allentown – Bethlehem region 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 Lehigh Valley International Airport located in Allentown, near Bethlehem.

How Often it Snows in Allentown & Bethlehem

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 Allentown and Bethlehem
Days   Inches Centimetres
  5.5 January 10.0 25.4
  4.8 February 11.1 28.2
  2.5 March   4.9 12.4
  0.4 April   1.0   2.5
  0.6 November   0.7   1.8
  3.5 December   5.2 13.2
17.3 Year 32.9 83.6

These averages don't show how much snowfall in Allentown and Bethlehem varies from year to year.

In December, for instance, one in four years totals over 8.7 inches of snow. Another 25 percent of years receive less than 1.2 inches for the month.

Similarly in January, fresh snowfall in the heaviest years amounts to over 12.7 inches, while the lightest years get less than 2.9 inches.

Snow in February ranges from over 16 inches in heavy snowfall years to under 2.7 inches in light years.

When Allentown & Bethlehem Have the First & Last Snowfalls

The first snowfall of winter for the cities usually arrives in December. Although not common, in some years it starts snowing in November.

The season's last snowfall typically happens in March. Occasionally a late snowfall shows up in April.

Allentown and Bethlehem are normally free of snow every year from May to October.

How Many Snowstorms Allentown & Bethlehem Get

Half the days with snowfall in Allentown and Bethlehem result in just a skiff of less than an inch left on the ground. For nine 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 once or twice 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 Allentown and Bethlehem 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
2.6 1.0 January 0.6 0.1
2.4 1.2 February 0.7 0.2
1.3 0.6 March 0.2 0.0
0.2 0.1 April 0.0 0.0
0.3 0.0 November 0.0 0.0
1.7 0.6 December 0.3 0.0
8.5 3.5 Year 1.8 0.3

How Much Snow Normally Accumulates in Allentown & Bethlehem

For about one-third of winter days, Allentown and Bethlehem have at least an inch of snow on the ground.

Snow mostly accumulates during January and February. Typically, on a couple of days in January and in February, snow covering the metropolitan area gets to ten or more inches deep.

Average total days per month and year in Allentown and Bethlehem 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
11.6   6.9 January   3.9 1.4
10.2   6.3 February   4.5 1.8
  4.1   2.6 March   1.7 0.8
  0.4   0.3 April   0.2 0.1
  0.4   0.1 November   0.0 0.0
  5.4   2.5 December   1.1 0.1
32.1 18.7 Year 11.4 4.2
Reference

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

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