Snow Day Calculator
Will school be closed tomorrow? Enter your weather forecast and school info to predict the probability of a snow day. Fun, fast, and shareable!
Snow Day Prediction
74%
Very Likely
Get the sled ready. There is a strong chance of a snow day!
Weather Forecast
Inches of snow from forecast
Expected low temperature
What it actually feels like
For your reference — data is not sent anywhere
School Information
Rural districts close more easily
Day of week affects closure odds
Prediction Breakdown
Here is how each factor contributes to your snow day probability:
Base chance: 15% → Final probability: 74%
Snow Day Facts & Tips
6+ inches almost guarantees a closure in most districts
Wind chill below -20°F can close school even without snow
Ice is more dangerous than snow and causes more closures
Rural bus routes on unplowed roads are a top closure reason
Fridays have slightly fewer snow days (make-up concerns)
Early storms catch salt trucks unprepared — higher closure rate
Snowfall Closure Guide
General guidance — rural districts close at lower amounts, urban districts need more.
Snow Day Prediction
74%
Very Likely
Get the sled ready. There is a strong chance of a snow day!
Quick Answer
A snow day calculator predicts the probability that school will be closed due to winter weather. The main factors are snowfall amount, temperature (ice risk), school district type, road conditions, wind chill, and whether it is the first snow of the season. As a general rule: 6+ inches of snow gives a very high chance (80%+), 3–6 inches gives a moderate to high chance (40–70%), and under 2 inches rarely closes school unless temperatures drop well below freezing for icy roads. Rural districts close more easily than urban ones. Our calculator weighs all these factors to give you an instant percentage.
Key Facts
- Most schools close when snowfall exceeds 6 inches in a single storm
- Temperatures below 20°F dramatically increase closure odds due to ice and wind chill
- Rural school districts are significantly more likely to close than urban ones
- The first snowfall of the season has a higher closure rate — districts and drivers are less prepared
- Friday snow days are slightly less common because schools prefer not to extend the year
- Wind chill below -20°F can trigger closures even without heavy snowfall
- Freezing rain and ice are often more dangerous than snow and lead to more closures
- Schools consider bus route safety, not just main road conditions
Frequently Asked Questions
Our snow day calculator uses a weighted probability model based on real-world snow day factors. It considers snowfall amount, temperature, wind chill, school district type (urban, suburban, or rural), road conditions, whether it is the first snow of the season, and the day of the week. Each factor adds or subtracts from the base probability to give you a percentage chance of a snow day.
There is no guaranteed amount, but 6+ inches of snow gives a very high probability (80%+) of a snow day in most districts. In rural areas, even 3–4 inches can close school, while urban districts may need 8+ inches. Ice and freezing rain can trigger closures at much lower snowfall amounts.
Many school districts close when the actual temperature or wind chill drops below -20°F to -25°F. This is because buses may not start, exposed skin can freeze in minutes, and children waiting at bus stops face frostbite risk. Wind chill is often the deciding factor, not just the air temperature.
Yes. Rural school districts typically close more frequently because they cover larger geographic areas with more rural roads that are plowed last. School buses travel on narrow, hilly, or unpaved roads that become dangerous quickly. Urban districts have better road infrastructure and more resources for snow removal.
Slightly, yes. Fridays see marginally fewer snow days because many schools have a minimum number of instructional days and prefer not to make up closures near weekends. Mondays and mid-week storms have slightly higher closure rates. However, severe weather will close school regardless of the day.
Our calculator provides a fun, research-informed probability estimate based on common snow day factors. It is not connected to live weather data or your specific school district policies, so treat it as a prediction tool rather than a guarantee. For official closure information, check your school district website, local news, or weather apps.
The first significant snowfall catches drivers, road crews, and school districts off guard. Salt trucks and plows may not be deployed yet, drivers are out of practice on snowy roads, and equipment is untested. By mid-winter, routines are established, making districts less likely to close for the same amount of snow.
Snow Day Prediction
74%
Very Likely
Get the sled ready. There is a strong chance of a snow day!