Frost dates in McHenry County, Illinois
The average last spring frost in McHenry County falls Apr 23 to May 1 and the average first fall frost Oct 11 to Oct 21, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 5b. Places: Algonquin, Cary, Crystal Lake, Fox River Grove, Harvard, Hebron. 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 |
|---|---|---|---|---|
| 60012 | Crystal Lake | May 1 | Oct 11 | 5b |
| 60013 | Cary | May 1 | Oct 11 | 5b |
| 60014 | Crystal Lake | May 1 | Oct 11 | 5b |
| 60021 | Fox River Grove | Apr 25 | Oct 19 | 5b |
| 60033 | Harvard | Apr 28 | Oct 12 | 5b |
| 60034 | Hebron | Apr 25 | Oct 21 | 5b |
| 60050 | McHenry | May 1 | Oct 11 | 5b |
| 60051 | Johnsburg | May 1 | Oct 11 | 5b |
| 60071 | Richmond | Apr 30 | Oct 13 | 5b |
| 60072 | Ringwood | May 1 | Oct 11 | 5b |
| 60081 | Spring Grove | Apr 23 | Oct 21 | 5b |
| 60097 | Wonder Lake | May 1 | Oct 11 | 5b |
| 60098 | Woodstock | Apr 28 | Oct 12 | 5b |
| 60102 | Algonquin | Apr 26 | Oct 18 | 5b |
| 60142 | Huntley | Apr 28 | Oct 12 | 5b |
| 60152 | Marengo | Apr 28 | Oct 12 | 5b |
| 60156 | Lake in the Hills | May 1 | Oct 11 | 5b |
| 60180 | Union | Apr 28 | Oct 12 | 5b |
Nearby counties
Lake County Boone County Kane County DuPage County DeKalb County Winnebago County
All Illinois counties · Download Illinois frost dates (CSV)
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