Ice Dam Prevention in Illinois
In Illinois, local ice dams deadlines run from Oct 16 to Nov 15, with a median around Oct 16 — a spread of weeks that a single statewide date would miss. Find your city below; each links to local freeze odds, a live 10-day outlook, and a checklist.
Notable cities
- Chicago — earliest deadline in the state
- Calumet City — latest deadline in the state
- Plainfield — near the state median
All Illinois cities
| City | Local deadline | Median first 28°F | ||
|---|---|---|---|---|
| Chicago | Oct 16 | Nov 15 | View → | Checklist |
| Aurora | Oct 16 | Nov 2 | View → | Checklist |
| Rockford | Oct 16 | Oct 28 | View → | Checklist |
| Springfield | Oct 16 | Nov 1 | View → | Checklist |
| Peoria | Oct 16 | Nov 2 | View → | Checklist |
| Elgin | Oct 16 | Oct 29 | View → | Checklist |
| Waukegan | Oct 16 | Oct 30 | View → | Checklist |
| Cicero | Oct 16 | Nov 11 | View → | Checklist |
| Arlington Heights | Oct 16 | Nov 7 | View → | Checklist |
| Evanston | Oct 16 | Nov 1 | View → | Checklist |
| Schaumburg | Oct 16 | Oct 24 | View → | Checklist |
| Bolingbrook | Oct 16 | Nov 1 | View → | Checklist |
| Palatine | Oct 16 | Oct 30 | View → | Checklist |
| Skokie | Oct 16 | Nov 1 | View → | Checklist |
| Des Plaines | Oct 16 | Nov 7 | View → | Checklist |
| Orland Park | Oct 16 | Nov 1 | View → | Checklist |
| Oak Lawn | Oct 16 | Nov 11 | View → | Checklist |
| Berwyn | Oct 16 | Nov 11 | View → | Checklist |
| Mount Prospect | Oct 16 | Nov 7 | View → | Checklist |
| Hoffman Estates | Oct 16 | Oct 24 | View → | Checklist |
| Oak Park | Oct 16 | Nov 11 | View → | Checklist |
| Elmhurst | Oct 16 | Nov 7 | View → | Checklist |
| Glenview | Oct 16 | Nov 1 | View → | Checklist |
| DeKalb | Oct 16 | Oct 28 | View → | Checklist |
| Moline | Oct 16 | Oct 31 | View → | Checklist |
| Buffalo Grove | Oct 16 | Nov 7 | View → | Checklist |
| Plainfield | Oct 16 | Nov 1 | View → | Checklist |
| Bartlett | Oct 16 | Oct 24 | View → | Checklist |
| Quincy | Oct 16 | Nov 8 | View → | Checklist |
| Crystal Lake | Oct 16 | Nov 1 | View → | Checklist |
| Streamwood | Oct 16 | Oct 24 | View → | Checklist |
| Romeoville | Oct 16 | Nov 1 | View → | Checklist |
| Rock Island | Oct 16 | Oct 31 | View → | Checklist |
| Hanover Park | Oct 16 | Oct 24 | View → | Checklist |
| Carpentersville | Oct 16 | Oct 29 | View → | Checklist |
| Wheeling | Oct 16 | Nov 7 | View → | Checklist |
| Park Ridge | Oct 16 | Nov 7 | View → | Checklist |
| Addison | Oct 16 | Nov 7 | View → | Checklist |
| Joliet | Nov 15 | Nov 4 | View → | Checklist |
| Naperville | Nov 15 | Oct 26 | View → | Checklist |
| Champaign | Nov 15 | Nov 2 | View → | Checklist |
| Bloomington | Nov 15 | Oct 30 | View → | Checklist |
| Decatur | Nov 15 | Nov 3 | View → | Checklist |
| Tinley Park | Nov 15 | Oct 30 | View → | Checklist |
| Normal | Nov 15 | Oct 27 | View → | Checklist |
| Wheaton | Nov 15 | Oct 26 | View → | Checklist |
| Downers Grove | Nov 15 | Oct 26 | View → | Checklist |
| Lombard | Nov 15 | Oct 26 | View → | Checklist |
| Belleville | Nov 15 | Oct 30 | View → | Checklist |
| Urbana | Nov 15 | Nov 2 | View → | Checklist |
| Carol Stream | Nov 15 | Oct 29 | View → | Checklist |
| Calumet City | Nov 15 | Oct 30 | View → | Checklist |
Back to the national Ice Dam Prevention guide, or see the methodology.
Data: NOAA NCEI 1991–2020 U.S. Climate Normals; live outlook by Open-Meteo. Last updated: July 11, 2026.