Frost dates in Winnebago County, Illinois
The average last spring frost in Winnebago County falls Apr 24 to May 1 and the average first fall frost Oct 12 to Oct 17, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 5b. Places: Cherry Valley, Durand, Loves Park, Machesney Park, Pecatonica, Rockford. 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 |
|---|---|---|---|---|
| 61016 | Cherry Valley | Apr 24 | Oct 17 | 5b |
| 61024 | Durand | Apr 29 | Oct 12 | 5b |
| 61063 | Pecatonica | Apr 26 | Oct 13 | 5b |
| 61072 | Rockton | May 1 | Oct 12 | 5b |
| 61073 | Roscoe | May 1 | Oct 12 | 5b |
| 61077 | Apr 24 | Oct 17 | 5b | |
| 61079 | May 1 | Oct 12 | 5b | |
| 61080 | South Beloit | May 1 | Oct 12 | 5b |
| 61088 | Winnebago | Apr 24 | Oct 17 | 5b |
| 61101 | Rockford | Apr 24 | Oct 17 | 5b |
| 61102 | Rockford | Apr 24 | Oct 17 | 5b |
| 61103 | Rockford | Apr 24 | Oct 17 | 5b |
| 61104 | Rockford | Apr 24 | Oct 17 | 5b |
| 61107 | Rockford | Apr 24 | Oct 17 | 5b |
| 61108 | Rockford | Apr 24 | Oct 17 | 5b |
| 61109 | Rockford | Apr 24 | Oct 17 | 5b |
| 61111 | Loves Park | Apr 24 | Oct 17 | 5b |
| 61112 | Cherry Valley | Apr 24 | Oct 17 | 5b |
| 61114 | Rockford | Apr 24 | Oct 17 | 5b |
| 61115 | Machesney Park | May 1 | Oct 12 | 5b |
Nearby counties
Boone County Ogle County Stephenson County DeKalb County McHenry County Lee County
All Illinois counties · Download Illinois frost dates (CSV)
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