Baltimore Snowfall Totals & Accumulation Averages
This page pulls together information on when, how much and how often Baltimore, Maryland has snow.
There are data and descriptions here of how many days it snows and the total amount of snowfall that Baltimore 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 Baltimore can expect the first and last snowfalls of the season.
All the numbers are averages, based on weather data gathered from 1981 to 2010 at the Baltimore/Washington International Thurgood Marshall Airport.
How Often it Snows in Baltimore
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).
These averages don't show how much the snowfall in Baltimore varies from year to year.
In December, for instance, one in four years totals over 4.7 inches of snow. Another 25 percent of years receive less than 0.2 inches for the month.
Similarly in January, fresh snowfall in the heaviest years amounts to over 8.3 inches, while the lightest years get less than two inches.
New snow for February ranges from ten or more inches in heavy snowfall years to under 0.3 inches in light years.
When Baltimore Has Its First & Last Snowfalls
The first snowfall of winter for Baltimore usually arrives in December. Although uncommon, November can get a little snow.
The season's last snowfall typically happens in March. Once every three or four years, Baltimore's last snowfall occurs as early as February. In unusual years an April snow flurry drops a dusting of snow over the city.
Baltimore is normally free of snow every year from May to October.
How Many Snowstorms Baltimore Gets
About half the days of snowfall in Baltimore amount to just a skiff, leaving less than an inch of fresh snow on the ground. For five days a year on average, the amount of new snow totals at least an inch.
Snowstorms of over five inches a day normally occur about once a year. But major blizzards that dump ten inches or more in one day are rare events that don't happen every year.
How Much Snow Normally Accumulates in Baltimore
For about 13 days in winter, Baltimore has at least an inch of snow on the ground.
Snow mostly accumulates during January and February. Typically, on one or two days in January and in February, the snow covering Baltimore gets to five or more inches deep.
National Climatic Data Center. NOAA's 1981-2010 Climate Normals.