Frost dates in Mason County, Illinois
The average last spring frost in Mason County falls Apr 17 and the average first fall frost Oct 18 to Oct 19, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 6a. Places: Bath, Easton, Forest City, Goofy Ridge, Havana, Kilbourne. 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 |
|---|---|---|---|---|
| 61532 | Forest City | Apr 17 | Oct 19 | 6a |
| 61567 | Goofy Ridge | Apr 17 | Oct 19 | 6a |
| 62617 | Bath | Apr 17 | Oct 19 | 6a |
| 62633 | Easton | Apr 17 | Oct 19 | 6a |
| 62644 | Havana | Apr 17 | Oct 19 | 6a |
| 62655 | Kilbourne | Apr 17 | Oct 19 | 6a |
| 62664 | Mason City | Apr 17 | Oct 18 | 6a |
| 62682 | San Jose | Apr 17 | Oct 18 | 6a |
Nearby counties
Menard County Fulton County Tazewell County Cass County Logan County Peoria County
All Illinois counties · Download Illinois frost dates (CSV)
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