Dayton Snowfall Totals & Accumulation Averages
This page pulls together information on when, how much and how often Dayton, Ohio has snow.
There are data and descriptions here of how many days it snows and the total amount of snowfall that Dayton 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 Dayton 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 climate data gathered from 1991 to 2020 in downtown Dayton.
How Often it Snows in Dayton
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 Dayton's snowfall varies from year to year.
In December, for instance, one in four years totals over 2.2 inches of snow. Another 25 percent of years receive less than 0.3 inches for the month.
Similarly in January, fresh snowfall in the heaviest years amounts to over 12.2 inches, while the lightest years get less than 1.9 inches.
Snow in February ranges from over 1.2 inches in heavy snowfall years to under 0.1 inches in light years.
When Dayton Has Its First & Last Snowfalls
Dayton's first snowfall of winter usually arrives in December. In rare years, it starts snowing as early as November.
The season's last snowfall can happen in February or more often March.
Dayton is normally free of snow every year from April to October.
How Many Snowstorms Dayton Gets
About half the days of snowfall in Dayton result less than an inch left 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 don't occur every year. Major blizzards that dump ten inches or more in one day are not expected here.
How Much Snow Normally Accumulates in Dayton
For only a small fraction of winter days does Dayton have at least an inch of snow on the ground.
Typically on five days a year the snow covering Dayton gets to five 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 (NCEI). Climate Normals.