School policy details verified against official sources in September 2026.
Enter your city, ZIP code, or Canadian postal code below to check tonight’s snow day chance. Choose your school type, public, private, K–12, or college and university, since each closes under different conditions.Will School Be Closed Tomorrow? SnowDay Predictor and Calculator
The score above reflects current snowfall, ice, temperature, and wind data for the location you searched, adjusted for your school type. Rochester City School District (RCSD) makes the actual call on closures, and it can be shaped by more than snow alone, since RCSD has closed schools for extreme cold on its own, separate from any snowfall total.
The lake that won't let winter finish early
Rochester sits close enough to Lake Ontario that lake-effect snow drives a large share of its winter totals, and the reason it keeps going is specific to the lake itself. According to the National Weather Service's Buffalo office, which maintains Rochester's climate records, Lake Ontario rarely freezes over completely, so the lake-effect process, cold air crossing relatively warm open water, can continue through the winter rather than shutting down once ice forms, the way it eventually does on some of the other Great Lakes.
NWS data puts Rochester's own seasonal total at around 90 inches, with roughly half of that coming specifically from lake effect rather than general winter storms. The split isn't even across the metro: areas along the lakeshore east of the city can top 120 inches in a season, while areas to the south see closer to 70. Within Monroe County itself, neighborhoods like Irondequoit, Brighton, and Greece often see noticeably heavier snow than the rest of the city, depending on which way the wind is blowing that day. Lake-effect bands frequently move in overnight, which is part of why routes like I-490, Route 104, and Lake Avenue can already be slick well before sunrise.
How Rochester City School District actually decides
RCSD posts closure information through its transportation department and shares updates through district social media and local media partners like WHEC. What sets Rochester apart from some of its neighbors is that the district doesn't treat cold as a separate, lesser concern: it has cancelled classes and activities specifically for dangerously low wind chill, independent of whatever the snowfall total happens to be that day.
What goes into the Snow Day Score for Rochester
Given how much Rochester's totals can swing within a short distance, from roughly 70 inches south of the city to over 120 near the lakeshore, the location you enter matters more here than it does in a city with more uniform snowfall. The calculator weighs snowfall, ice, low temperature and wind chill, storm timing, and your school type together, and because RCSD closes for extreme cold on its own, the temperature and wind inputs carry real weight in Rochester specifically, not just as a modifier on snow totals. As always, this is a probability estimate meant to help you plan, not a stand-in for RCSD's own announcement.
Rochester Snow Day Quick Reference
| Factor | What Rochester City School District does |
|---|---|
| Average seasonal snowfall | Around 90 inches in the city; over 120 inches along the lakeshore east of the city; closer to 70 inches to the south |
| Lake-effect share | Roughly half of the season's total snowfall comes specifically from lake effect |
| Why it keeps going | Lake Ontario rarely freezes solid, so lake-effect snow can continue through most of the winter |
| Neighborhood variation | Irondequoit, Brighton, and Greece often see heavier totals depending on wind direction |
| Also closes for | Extreme cold and dangerous wind chill, separate from snowfall |
Frequently asked questions
Why does Rochester keep getting lake-effect snow well into winter instead of it tapering off?
Lake Ontario rarely freezes over completely, so the warm-water-meets-cold-air process behind lake-effect snow can keep running through the season rather than shutting down once the lake ices up, which is what quiets things down elsewhere.
Does every part of Rochester get the same amount of snow?
No. NWS data shows lakeshore areas east of the city can see over 120 inches a season, while areas south of the city see closer to 70, and neighborhoods like Irondequoit, Brighton, and Greece often get hit harder depending on wind direction.
Does RCSD close schools for cold weather, not just snow?
Yes. The district has cancelled classes and activities specifically for extreme cold and dangerous wind chill, independent of the day's snowfall total.
Sources
- National Weather Service Buffalo, Rochester climate information, weather.gov/buf/ROCclifo
- WHEC, winter weather closure reporting
- Rochester City School District, transportation and school closings page, rcsdk12.org
Related SnowDayScore resources
See how nearby Buffalo, Syracuse, and Erie handle the same Great Lakes snowbelt pattern. Run your own numbers with the Manual Snow Day Calculator, or read our methodology for how the score is built.