Snow Day Calculator
Predict school snow day probability from region, snowfall, temperature, and road conditions. Fun estimate — always check your district for official closures.
Added Jun 16, 2026
Input
Result
Enter a value for region type to see your result.
How it works
Estimates the likelihood of a school or office snow day based on forecasted snowfall, temperature, timing, road conditions, and your region. This is a fun probability estimate — always check your district's official announcements.
Step by step
- 01Select your region — areas accustomed to snow have higher plowing capacity and higher closure thresholds.
- 02Enter the forecasted snowfall amount in inches.
- 03Enter the expected morning low temperature — near or below freezing increases ice risk.
- 04Select when the snow falls — overnight accumulation hitting roads by morning commute is most disruptive.
- 05Select expected road conditions — icy roads are a stronger closure driver than deep snow alone.
Examples
6 inches overnight, 25°F, icy roads — Southern US
Six inches overnight with icy roads in a southern state (rare snow, limited plowing capacity) is an almost certain closure. Southern districts close at much lower thresholds than northern ones.
Inputs
- Region type:
- southern_us
- Forecasted snowfall:
- 6
- Morning low temperature:
- 25
- When does snow fall?:
- overnight
- Expected road conditions:
- icy
Result
- Snow day probability:
- 95% — Almost certain
Frequently asked questions
How do schools decide to cancel for snow?
Superintendents typically decide by 5–6 AM based on road reports from public works, school bus contractors' ability to run routes safely, facility conditions (heating, parking lots), and the safety of walking students. Snowfall amount alone is rarely the only factor — ice and timing matter as much or more.
Why does 2 inches close schools in some places but not others?
Regions that rarely get snow have fewer plows, less experienced winter drivers, and fewer salt/sand stockpiles. A 2-inch storm can paralyze a southern city where it would barely be noticed in Minnesota. Districts calibrate their closure thresholds to their local infrastructure and driver experience.
What time do schools announce snow days?
Most school districts announce closures between 5–7 AM, giving families and staff time to make arrangements. Some districts use automated calling or text alerts, apps like ParentSquare or Remind, local TV news crawls, and the district website. Sign up for your district's notification system the night before a storm.
Is this calculator accurate?
This is a fun probability estimator based on generalised regional patterns — it is not a real prediction system. Actual decisions depend on factors unique to your district. Use it for planning purposes and always verify with your school's official channels.