Frost dates in St. Clair County, Illinois
The average last spring frost in St. Clair County falls Apr 1 to Apr 12 and the average first fall frost Oct 20 to Nov 4, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 6b to 7a. Places: Belleville, Brooklyn, Cahokia, Caseyville, Centreville, Dupo. Pick a ZIP for 10% and 90% odds, soil temperature and the 7-day freeze forecast.
| ZIP | Place | Last spring frost | First fall frost | Zone |
|---|---|---|---|---|
| 62059 | Brooklyn | Apr 1 | Nov 4 | 7a |
| 62201 | Fairmont City | Apr 8 | Oct 26 | 7a |
| 62203 | East St. Louis | Apr 8 | Oct 26 | 7a |
| 62204 | Washington Park | Apr 8 | Oct 26 | 7a |
| 62205 | East St. Louis | Apr 8 | Oct 26 | 7a |
| 62206 | Cahokia | Apr 8 | Oct 26 | 7a |
| 62207 | Centreville | Apr 8 | Oct 26 | 7a |
| 62208 | Fairview Heights | Apr 8 | Oct 26 | 7a |
| 62220 | Belleville | Apr 12 | Oct 20 | 7a |
| 62221 | Shiloh | Apr 12 | Oct 20 | 7a |
| 62223 | Belleville | Apr 8 | Oct 26 | 7a |
| 62225 | Scott AFB | Apr 12 | Oct 20 | 6b |
| 62226 | Swansea | Apr 12 | Oct 20 | 7a |
| 62232 | Caseyville | Apr 8 | Oct 26 | 7a |
| 62239 | Dupo | Apr 8 | Oct 26 | 7a |
| 62240 | Dupo | Apr 6 | Oct 27 | 7a |
| 62243 | Freeburg | Apr 12 | Oct 20 | 7a |
| 62254 | Lebanon | Apr 12 | Oct 20 | 6b |
| 62255 | Lenzburg | Apr 12 | Oct 22 | 6b |
| 62257 | Marissa | Apr 12 | Oct 22 | 7a |
| 62258 | Mascoutah | Apr 12 | Oct 20 | 6b |
| 62260 | Millstadt | Apr 8 | Oct 26 | 7a |
| 62264 | New Athens | Apr 12 | Oct 20 | 7a |
| 62269 | O'Fallon | Apr 12 | Oct 20 | 7a |
| 62282 | St. Libory | Apr 12 | Oct 20 | 6b |
| 62285 | Smithton | Apr 12 | Oct 20 | 7a |
| 62289 | Summerfield | Apr 12 | Oct 20 | 6b |
Nearby counties
Monroe County Madison County Clinton County Randolph County Washington County Bond County
All Illinois counties · Download Illinois frost dates (CSV)
Never miss a frost: get The Dial
Weekly yard timing, plus frost and soil-temperature alerts for your ZIP code.
- Freeze alerts
- Soil-temp heads-up
- Weekly yard to-dos
Free. One weekly email plus alerts when your ZIP has a frost or a soil-temperature change worth acting on. After you submit, Kit (our email provider) sends a confirmation email: check your email and click the link to confirm. You aren't subscribed until you do. We collect only your email address and ZIP, sent to Kit to deliver The Dial. Unsubscribe anytime.