How much snow does it take to close school?
There is no national rule. The same storm that closes every school in one state is a normal Tuesday in another. What matters is how often a place gets snow, how well it is equipped, and how its students get to school.
The short answer, by climate
| Climate | Examples | Snow that often makes closure a coin flip |
|---|---|---|
| Rarely sees snow | Deep South, Texas, lowland Pacific Northwest | About 1″, or any freezing rain |
| Occasional snow | Virginia, Maryland, DC, North Carolina, Kentucky | About 2.5″ |
| Regular snow | New Jersey, Ohio, Illinois, Pennsylvania, southern New England | About 5″ |
| Snow country | Upstate New York, Michigan, Wisconsin, northern New England, Colorado | About 7″ |
| Deep-winter climate | Minnesota, the Dakotas, Alaska | About 9″ — cold closes schools more often than snow |
These are the model's starting assumptions for overnight snow, not district policies. Individual districts vary widely.
It's rarely just the total
Timing. Six inches that stop at 8 PM are much less disruptive than four inches falling during the 6 AM bus run. Ice. A glaze of freezing rain can close schools that would stay open for a foot of snow. Temperature. Snow at 33°F on warm pavement may melt on contact; snow at 15°F sticks immediately. Wind. On open terrain, gusts can drift rural roads shut after the snow stops. Cold. In the northern tier, wind chills far below zero endanger students waiting at bus stops.
Why districts in the same county decide differently
Rural districts with long bus routes on hilly or unpaved roads tend to close sooner than compact city districts where many students walk. Districts that have already used their built-in snow days may be more reluctant to close again. And more districts now replace some snow days with remote instruction. SnowCall lets you set your area type and snow days used so the estimate reflects your district, not just your weather.
Regional guides
- Northeast & New England — nor'easters, rain–snow line
- Mid-Atlantic — ice storms, marginal temperatures
- Great Lakes Snowbelt — lake-effect bands, whiteout squalls
- Upper Midwest & Northern Plains — dangerous wind chill, blizzards
- Rocky Mountains & Intermountain West — upslope storms, elevation differences
- Pacific Northwest & Alaska — rare lowland snow, freezing rain
Ready to check? Get your snow day odds or read how the prediction formula works.