Frost dates in Cook County, Minnesota
The average last spring frost in Cook County falls May 15 to May 26 and the average first fall frost Sep 26 to Oct 1, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 3b to 4b. Places: Grand Marais, Lutsen. 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 |
|---|---|---|---|---|
| 55604 | Grand Marais | May 23 | Sep 26 | 3b |
| 55605 | May 24 | Sep 29 | 4b | |
| 55606 | May 24 | Sep 29 | 4a | |
| 55612 | Lutsen | May 26 | Sep 27 | 3b |
| 55613 | May 15 | Oct 1 | 4b | |
| 55615 | May 26 | Sep 27 | 3b |
Nearby counties
Lake County St. Louis County Carlton County Itasca County Koochiching County Aitkin County
All Minnesota counties · Download Minnesota frost dates (CSV)
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