When can you expect the first snow of the season?

Winter might still be nearly three months away, but many parts of the US can see their first snow during the fall.

While we can’t tell you exactly when the season’s first snowflakes will fall at your house, we can give you an idea of ​​when that typically happens based on average weather conditions over many years.

The map below shows the average date of the first measurable snow across the Lower 48 states, according to the most recent 30-year climatological averages (1991-2020) from NOAA’s National Centers for Environmental Information.

Measurable snow is defined as an accumulation of at least 0.1 inches, so if the season’s first snowflakes don’t stick to the ground, it’s not considered the official first snowfall in the weather records.

Keep in mind, however, that the weather doesn’t always follow what’s considered average. A strong cold front could provide the season’s first snow days or even weeks earlier than what’s shown on the map below. On the other hand, an upper-level area of ​​high pressure that persists into the fall could push the first snowfall of the season later than the date indicated on the map.

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Average date of the first snowfall of the season.

Believe it or not, the highest peaks of the Rockies can see snow as early as late summer.

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By September, the Washington Cascades, Bitterroot Mountains along the Idaho-Montana border, the highest peaks of the Colorado Rockies and the western High Plains see their first flakes, in an average year.

In the Northeast, the season’s first snow typically occurs in October in northern and western New England, upstate New York and from the higher elevations of central and western Pennsylvania down into the central Appalachians.

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In the Midwest and Plains, areas from Michigan and northern Ohio into the Dakotas, western and northern Kansas and the Texas and Oklahoma panhandles see their first snow during October in an average year.

In the West, October typically ushers in the season’s first snowfall in Wyoming, eastern Idaho, the lower elevations of Montana, Utah’s Wasatch Range, Colorado’s foothills and mountain valleys and the mountains of New Mexico.

Much of the Northeast will receive its first snowfall of the season by November in an average year. This includes the Interstate 95 corridor from Boston to Richmond, Virginia.

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In the Midwest and Plains, November usually brings the season’s first snow to much of the Ohio Valley, parts of the southern Great Lakes, the Corn Belt, southern and eastern Kansas and parts of Oklahoma.

In the West, the first snow typically falls in November in southwestern New Mexico, parts of Arizona and the Pacific Northwest.

Most areas from the southern Plains to the Southeast don’t usually see their first snowfall of the season until December. This includes the Dallas-Fort Worth Metroplex and Nashville, Tennessee, according to the averages calculated by NOAA.

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Many Southern locations of the US from the eastern Carolinas to central and southern Texas might not pick up any snow in an average year. This is especially true along the Gulf Coast and in Florida.

If it does snow in these places, it’s typically not until January or February, when average temperatures dip to their lowest point of the year.

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