Granite City High School Snow Day Calculator
Will Granite City High School close tomorrow? Check the odds.
Powered by NOAA / National Weather ServicePowered by NOAA / National Weather ServiceWill Granite City High School close tomorrow? Check the odds.
Powered by NOAA / National Weather ServiceGranite City High School is a high school in Granite City, Illinois, part of Granite City CUSD 9 Schools. The forecast above uses the school's own coordinates, so it reflects conditions at this campus rather than an average across the wider area.
Closure decisions for Granite City High School are almost always made at the district level. If Granite City CUSD 9 Schools closes, this school closes with it — so the district-wide forecast is usually the number that matters (see the Granite City CUSD 9 Schools forecast).
Suburban districts depend heavily on bus fleets covering a wide area of residential streets, which are plowed after main roads. Side-street conditions at 5 AM often decide the call.
High schools start earliest, so they feel a storm before the rest of the district does — the first buses often roll while roads are still being treated. That earlier start time is one reason a district watching a morning storm may call the day off entirely rather than run a delay.
Illinois averages about 38 inches of snow per year. Chicago Public Schools rarely close, but suburban and downstate districts close more frequently for lake-effect and prairie blizzard events.
We score the live forecast at this location against the factors that drive closure calls: snowfall total and intensity, when the heaviest accumulation lands relative to the morning commute, ice and freezing rain, wind chill, and how confident the forecast models are. You get a probability for a full closure, a two-hour delay, and an early dismissal.
This is an independent forecast, not an official announcement. Confirm any closure with Granite City CUSD 9 Schools before acting on it.