Snow Day Calculator
Will school be cancelled tomorrow? Enter tonight’s forecast and get an instant snow-day score — from “very unlikely” all the way to “very likely, start the hot cocoa.” Pure fun, zero homework.
🔒 Your forecast stays in your browser — nothing is sent or stored anywhere.
| Factor | Points |
|---|---|
| Snowfall | — |
| Temperature | — |
| Wind speed | — |
| Ice / freezing rain | — |
| Total score | — |
Your snow-day gauge
Where your score lands on the 0–90 scale, with each likelihood zone marked.
| Factor | Points earned | How it scores |
|---|---|---|
| Snowfall | — | ≥8″ = 40 · 4–8″ = 25 · 2–4″ = 12 |
| Temperature | — | ≤15°F = 20 · ≤25°F = 10 |
| Wind speed | — | ≥35 mph = 15 · ≥25 mph = 8 |
| Ice / freezing rain | — | checked = 15 · unchecked = 0 |
- Snowfall carries the most weight: 8 or more inches earns 40 of the 90 points, 4–8 inches earns 25, and 2–4 inches earns 12.
- Ice or freezing rain adds a flat 15 points, because slick roads close schools faster than deep snow — temperature adds up to 20 and wind up to 15.
- Scores land in four bands — 0–20 “Very unlikely”, 21–45 “Possible”, 46–70 “Likely”, 71–90 “Very likely” — like the worked example: 8 inches of snow, a 20°F low, 30 mph wind and ice make 73 points.
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How it works
Enter tonight’s forecast
Type in the expected snowfall, overnight low temperature, and wind speed from your weather app. Check the box if freezing rain or ice is expected.
Get your score instantly
Your snow-day score (0–90) updates live as you type — no buttons, no waiting. The breakdown table shows exactly where every point came from.
Read the verdict
Scores land in one of four bands, from “Very unlikely” to “Very likely — start the hot cocoa.” Then cross your fingers like everyone else.
How the score is calculated
Snowfall carries the most weight: 8+ inches earns 40 points, 4–8 inches earns 25, and 2–4 inches earns 12. Temperature adds 20 points when the low is 15°F or below, or 10 points at 25°F or below. Wind adds 15 points at 35+ mph or 8 points at 25+ mph. Ice or freezing rain adds a flat 15 points, because slick roads close schools faster than deep snow.
Worked example: 8 inches of snow (40) + a 20°F low (10) + 30 mph wind (8) + ice expected (15) = 73 points → “Very likely.” Total possible: 90 points.
It comes down to roads, not sidewalks. Six inches of powdery snow is inconvenient but plowable — school buses can usually roll once the plows make a pass. A quarter-inch of ice is a different story: it coats everything, black ice is nearly invisible, and buses simply cannot stop or steer safely on it.
School districts make the call based on bus-route safety above all else. That’s why freezing rain is the single most powerful factor in this calculator’s scoring — 15 points, the same weight as 35 mph winds. If your forecast mentions “freezing rain” or “icy conditions,” treat your score’s upper bands seriously (but still as entertainment — see the disclaimer below!).
Real snow-day decisions are made by district superintendents, usually between 4 and 6 AM, and they weigh factors this calculator deliberately simplifies:
- Road conditions on bus routes — the deciding factor. District staff often drive routes at dawn to check.
- Timing of the storm — snow that falls at 5 AM hurts more than snow that falls at 5 PM.
- Temperature trends — dropping temps after snow mean refreeze and black ice by morning.
- Building readiness — frozen pipes, no heat, or power outages can close schools on a clear day.
- Neighboring districts — shared bus routes and staff mean districts often move together.
This calculator models only the weather ingredients — it cannot see your roads, your buses, or your superintendent. Always check your district’s official announcements; this tool is for fun only.
No — and it doesn’t try to be. This snow day calculator is a for-fun toy built for entertainment. It has zero connection to any school district, and its point values are playful estimates, not meteorological science.
Schools decide for themselves, using their own people, their own roads, and their own judgment — sometimes factors like a broken boiler or a staffing shortage matter more than the weather. Never treat a “Very likely” result as a guarantee, and never skip school based on this page. When in doubt, wait for the official call from your school.
Reading your score: four worked forecasts
The points ladder is short enough to learn by example. Snowfall under 2 inches earns 0 points, 2 to 4 inches earns 12, 4 to 8 inches earns 25, and 8 inches or more earns 40. Temperature adds 20 points at 15 degrees Fahrenheit or below, or 10 points at 25 or below. Wind adds 15 points at 35 miles per hour or more, or 8 points at 25 or more. Ice or freezing rain adds a flat 15. The four bands are 0 to 20 Very unlikely, 21 to 45 Possible, 46 to 70 Likely, and 71 to 90 Very likely.
| Forecast | Points | Score | Band |
|---|---|---|---|
| 1 inch, 28 degrees, 10 mph wind, no ice | 0 plus 0 plus 0 plus 0 | 0 | Very unlikely |
| 3 inches, 22 degrees, 20 mph wind, no ice | 12 plus 10 plus 0 plus 0 | 22 | Possible |
| 6 inches, 18 degrees, 30 mph wind, no ice | 25 plus 10 plus 8 plus 0 | 43 | Possible |
| 8 inches, 20 degrees, 30 mph wind, ice expected | 40 plus 10 plus 8 plus 15 | 73 | Very likely |
Two lessons hide in that table. First, there is no fixed amount of snow that cancels school: 6 inches lands only in Possible here, because the temperature is not extreme, the wind is middling, and there is no ice — while a colder, icier night with less snow can score higher. Second, ice is the great equalizer: a night with no snow at all can still reach 50 points from cold (20), wind (15), and ice (15) combined, which lands in Likely. That matches why districts fear ice more than powder: buses can wait out plowable snow, but they cannot steer or stop safely on ice.
And the limit that matters most: this score only sees the four numbers you type in. It cannot see your roads, your bus routes, the timing of the storm, or your superintendent’s 5 AM drive. Treat every band as a conversation starter, never as the school’s decision — the official announcement is the only answer that counts.
Frequently asked questions
How accurate is the snow day calculator?
It’s for fun, not forecasting. The point values are playful estimates based on the weather factors that commonly lead to school closures — heavy snow, extreme cold, high winds, and ice. Real districts consider many things this tool can’t see, like actual road conditions and bus routes. Enjoy the score, but check your school’s official announcements for the real answer.
What score means school will probably be cancelled?
Scores of 46 and up land in the “Likely” band, and 71+ is “Very likely — start the hot cocoa.” But these are just the calculator’s playful labels — they are not predictions. Your school district makes its own call, and a high score here guarantees nothing.
Why does freezing rain add so many points?
Ice checked adds 15 points — the single biggest one-factor swing besides heavy snowfall. That’s because ice is historically the #1 school-closure trigger: even a thin glaze makes roads impassable for school buses, while several inches of powdery snow can often be plowed through.
Can I use this to decide whether to go to school?
No. This calculator is entertainment only and has no connection to your school. Schools decide closures themselves, and attending (or skipping) should follow your school’s official announcements and your family’s judgment — never a fun score on the internet.
Does my data get sent anywhere?
No. All calculations happen instantly in your browser with JavaScript. Your forecast inputs are never sent to a server, stored, or shared — close the tab and they’re gone.
When do schools usually announce snow days?
Most districts announce between 4 and 6 AM on the day itself, after staff have checked road conditions — though big storms can trigger evening announcements the night before. Your district’s website, app, or local news station is the place to watch. This calculator can’t see those announcements, so it will never replace them.
How much snow does it take to get a high score?
There is no single snowfall number: under 2 inches earns 0 points, 2 to 4 inches earns 12, 4 to 8 inches earns 25, and 8 inches or more earns 40, but the total also needs temperature, wind, and ice points. A 6-inch forecast with mild temperatures and no ice scores only 43, in the Possible band, while an icy night with less snow can score higher. And a high score here is still just a playful label, not a school closure.
Can a cold day with no snow still score high?
Yes. With no snow at all, extreme cold adds 20 points, strong wind adds 15, and ice adds 15, for 50 points, which lands in the Likely band. That is deliberate: ice closes roads faster than deep snow, because buses cannot steer or stop safely on it. It is also a good reminder that this is a toy score, not a forecast — real districts decide from road conditions, not from points.
Does the snow day calculator work for colleges and workplaces?
Only as a rough weather gauge. The score is built around the factors that close schools — snowfall, ice, cold and wind — and colleges and workplaces decide on their own criteria: campuses, commutes, and essential services all weigh differently, and a delayed start is a different decision from a full closure, which this score does not distinguish. Whatever the score says, the official announcement from your college or employer is the only answer that counts.
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⚠️ For fun only — not official
This snow day calculator is pure entertainment. It is not affiliated with, endorsed by, or connected to any school, school district, or weather service. Its scores are playful estimates, not forecasts or predictions.
Schools decide for themselves. Superintendents make closure calls based on actual road conditions, bus safety, building readiness, and many factors no web page can see. A “Very likely” score here does not mean school will be cancelled — and a “Very unlikely” score does not mean you should travel in dangerous weather.
Always follow your school district’s official announcements and use your own judgment in severe weather. Stay safe, stay warm, and enjoy the snow. ❄️