Snow Day Calculator for Ann Arbor, MI
Will Ann Arbor schools be closed tomorrow?
Tomorrow by school district
| District | Closure | Link |
|---|---|---|
| Ann Arbor Public Schools | — | — |
Districts serving Ann Arbor ZIP codes (NCES). Chances from the National Weather Service forecast.
Not listed? Enter your ZIP
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Snow by hour
From the National Weather Service forecast, updated hourly. Estimate only. Your district makes the call.
Snow in Ann Arbor: what is normal
- Snow a year
- 59 in.
- Days with 3+ in.
- 4.7
- Days with 1+ in.
- 18.5
NOAA NCEI U.S. Climate Normals 1991–2020, Ann Arbor SE, MI station. Averages per year.
Ann Arbor gets snow most winters, so districts plan for it. The calculator scales each storm by this local normal: in Ann Arbor, closures usually take about 8 inches overnight, or ice, or snow at the worst time of the morning. How the calculator works.
What closes schools in Ann Arbor (our model)
| Overnight snow | about 8 inches |
|---|---|
| Ice (freezing rain) | about 0.19 in. |
| Wind chill at bus time | −27°F |
| Normal winter low | 18°F |
Levels where a closure becomes likely in our model, from NOAA normals. Not a district policy.
ZIP codes covered
48104, 48109
ZIP codes inside or near Ann Arbor. Each has its own forecast; enter yours above for your district.
Ann Arbor snow day questions
Will Ann Arbor, MI schools be closed tomorrow?
The calculator above shows tomorrow's chance of a closure and of a delay for each Ann Arbor-area school district, from tonight's National Weather Service forecast. It updates every hour from the afternoon until morning. It is an estimate: your district makes and announces the decision, often early in the morning or the evening before a big storm.
How much snow does Ann Arbor, MI get?
Ann Arbor averages 59 inches of snow a year, with about 4.7 days a year of 3 inches or more and 18.5 days of an inch or more (NOAA 1991–2020 climate normals, Ann Arbor SE, MI station).
How much snow does it take to close schools in Ann Arbor, MI?
Our model treats about 8 inches of snow falling overnight as the level where closures become likely in Ann Arbor, because the area sees 4.7 days a year with 3+ inches and is used to plowing. Ice, a winter storm warning, or heavy snow right at bus time can close schools with less.
Guides
- How much snow cancels school?
From one inch in Atlanta to a foot in Buffalo: what it takes in every state, with NOAA data.
- What time are snow days announced?
When districts decide, how they tell families, and when to check the calculator.
- Wind chill and school closings
How cold is too cold for school, the NWS cold alerts, and local cold lines by city.
- Signs of a snow day tomorrow
The forecast signs that really matter, and the folklore that doesn't.
Nearby
Ann Arbor: did school close today?
Your report improves tomorrow's estimate.