Portland Snowfall Totals & Accumulation Averages
This page pulls together information on when, how much and how often Portland, Maine has snow.
There are data and descriptions here of how many days it snows and the total amount of snowfall that Portland 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 Portland can expect the first and last snowfalls of the season.
The first set of monthly snow totals are averages for 2010 to 2019. All the other numbers are averages, based on weather data gathered from 1981 to 2010 at the Portland International Jetport.
How Often it Snows in Portland
The next two tables list 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 Portland varies from year to year.
In December, for instance, one in four years totals over 18.7 inches of snow. Another 25 percent of years receive five inches or less for the month.
Similarly in January, fresh snowfall in the heaviest years amounts to over 20.3 inches, while the lightest years get less than 13.5 inches.
New snow for February ranges from over 16.7 inches in heavy snowfall years to under five inches in light years.
When Portland Has Its First & Last Snowfalls
The first snowfall of winter for Portland usually arrives in December. Every three or four years, November also gets snow.
The season's last snowfall typically happens in April. Every few years April has no snow, which moves the last snowfall to March.
Portland is normally free of snow every year from May to October.
How Many Snowstorms Portland Gets
Just under half the days of snowfall in Portland 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 four times a year. But major blizzards that dump ten inches or more in one day don't happen each year.
How Much Snow Normally Accumulates in Portland
A little more than half of winter days in Portland have at least an inch of snow on the ground.
Snow mostly accumulates during January and February. Typically, on seven days in January and in February, plus another five or six days in March, the snow covering Portland gets to ten or more inches deep.
Jay Lawrimore, Ron Ray, Scott Applequist, Bryant Korzeniewski, Matthew Menne. 2016. Global Summary of the Month and Year, Version 1.0. NOAA National Centers for Environmental Information.
NOAA National Centers for Environmental Information. 1981-2010 U.S. Climate Normals. (Data Access. FTP.)