Michigan‘s first Freeze Dates Arrive: What to Expect this Fall
Lansing,MI – september 25,2025 – As fall officially began on September 22nd,Michigan residents are bracing for the season’s first freeze. Average first freeze dates across the state range from early September in the Upper Peninsula and northern Lower Michigan to late October in the southern portions of the state,according to data from the Midwestern Regional Climate Center (MRCC). Understanding these dates is crucial for gardeners, farmers, and anyone preparing for colder weather.
The MRCC, a collaboration between the National Centers for Environmental Facts and Purdue University, provides interactive maps detailing average freeze dates from 1950 to 2024. These maps show that counties in the Upper Peninsula and northern Michigan typically experience their first freeze in early September, while the Lower Peninsula generally sees freezing temperatures arrive between late September and late October. On average, Michigan begins to see freezing temperatures in mid-September to early November.
But what’s the difference between a frost and a freeze? According to the Old Farmer’s Almanac, frost forms when temperatures are near or above 32 degrees Fahrenheit, while a freeze occurs when temperatures drop to or below 32 degrees. The Almanac offers first and last frost dates for specific Michigan cities.
These dates are important because freezing temperatures can substantially impact plants and outdoor infrastructure. Gardeners should take steps to protect sensitive plants, and homeowners should prepare for potential issues like frozen pipes. The MRCC’s interactive maps and the Old Farmer’s Almanac’s frost date tool are valuable resources for staying informed and prepared throughout the fall season.