How Much Snow Closes Schools? Real Regional Examples
There is no single number. A school district's decision depends on its road equipment, its bus routes, and how much snow the region typically gets, not just the forecast. What follows are real, sourced regional examples, not a generalized rule.
Virginia (low-snowfall region)
The Virginia Department of Transportation generally begins plowing state roads once about two inches of snow has accumulated, treating the most heavily traveled roads first. Because the state does not maintain the plow and salt fleet size that snowbelt states do, districts across Virginia generally close at far lower snowfall totals than districts in the Upper Midwest or Great Lakes region.
Michigan (high-snowfall region, regional context)
Muskegon County, on the Lake Michigan snowbelt, averages about 91.94 inches of snow a year, compared with about 74.40 inches in nearby Grand Rapids, according to the Muskegon County Community Profile , which cites the Michigan State Climatologist's Office. This is a regional snowfall comparison, not a named district closure threshold, but it illustrates how much lake-effect exposure changes seasonal totals even between two Michigan cities roughly 40 miles apart.
Texas (rare-snowfall region)
During Winter Storm Uri in February 2021, the National Weather Service recorded up to half an inch of ice accumulation across North and Central Texas, with 5 inches of snow at Dallas-Fort Worth International Airport, according to NOAA's National Centers for Environmental Information . Schools across Texas experienced widespread closures for days, not because the totals were extreme by northern standards, but because Texas infrastructure is not built for sustained freezing conditions at that scale.
Ohio (hours-based policy context, not a snowfall threshold)
Ohio does not use a fixed snowfall or day-count threshold at the state level at all. A 2014 law replaced the old “calamity day” limit with a minimum instructional-hours requirement, 910 hours for grades K through 6 and 1,001 hours for grades 7 through 12, according to the Ohio Department of Education and Workforce. Individual districts still set their own closure practices, but the state itself measures the year in hours, not snow days used. This is policy context, not a snowfall threshold.
Named Examples by Region
| Region type | Example | What actually happens | Source |
|---|---|---|---|
| Low snowfall | Virginia | VDOT plows state roads at about 2 inches of accumulation | Virginia Department of Transportation |
| High snowfall (regional average, not a threshold) | Muskegon County, Michigan | Averages about 91.94 inches a year vs. about 74.40 in nearby Grand Rapids | Muskegon County Community Profile |
| Rare snowfall | Texas (Feb 2021) | Up to half an inch of ice and 5 inches of snow at DFW contributed to widespread school closures across Texas | NOAA NCEI, National Weather Service |
| Hours-based policy (not a snowfall threshold) | Ohio | No day limit; 910 to 1,001 instructional hours required per year | Ohio Department of Education and Workforce |
Is there a standard number of inches that closes schools everywhere?
No. Thresholds vary by region, road infrastructure, and district policy. Two districts can receive identical snowfall and reach different decisions.
Why did Texas close schools for less snow than Michigan would tolerate?
Texas infrastructure is not built for sustained winter weather at scale. During the February 2021 storm, the National Weather Service recorded up to half an inch of ice, which is far more dangerous on unequipped roads than several inches of dry snow in a snowbelt state.
Does Ohio have a fixed number of snow days allowed per year?
No. Since a 2014 law, Ohio measures the school year in required instructional hours rather than a fixed day count, according to the Ohio Department of Education and Workforce.
●Virginia Department of Transportation, winter weather and snow removal policy
●Ohio Department of Education and Workforce, “Guidance on Schedule Change from Days to Hours”
●NOAA National Centers for Environmental Information, “The Great Texas Freeze: February 11-20, 2021”
●Muskegon County Community Profile (citing the Michigan State Climatologist's Office)
Related reading: See how wind chill alone can trigger a closure, why freezing rain often closes more schools than heavy snow, and browse state and province closure guides. Or head back to the SnowDay Score predictor to check your own city.
Related reading
Curious how these thresholds play out in the Twin Cities? See the Minneapolis, MN predictor and the St. Paul, MN predictor. For why ice and freezing rain often carry more weight than fresh snowfall, see our ice-versus-snow breakdown. For the full picture of how our estimates are built, see the methodology page, or head back to the SnowDay Score predictor to check your own city.