Frost dates in Koochiching County, Minnesota
The average last spring frost in Koochiching County falls May 16 to Jun 2 and the average first fall frost Sep 13 to Sep 26, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 3a to 3b. Places: Big Falls, International Falls, Littlefork, Mizpah, Nett Lake, Ranier. 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 |
|---|---|---|---|---|
| 55772 | Nett Lake | Jun 2 | Sep 15 | 3b |
| 56627 | Big Falls | May 24 | Sep 20 | 3b |
| 56629 | May 23 | Sep 21 | 3b | |
| 56649 | International Falls | May 28 | Sep 16 | 3b |
| 56653 | Littlefork | May 23 | Sep 21 | 3b |
| 56654 | May 23 | Sep 21 | 3a | |
| 56658 | May 24 | Sep 20 | 3b | |
| 56660 | May 16 | Sep 26 | 3b | |
| 56661 | Mizpah | May 16 | Sep 26 | 3b |
| 56668 | Ranier | May 29 | Sep 13 | 3a |
| 56669 | May 28 | Sep 16 | 3b |
Nearby counties
Itasca County Beltrami County Lake of the Woods County Clearwater County St. Louis County Cass County
All Minnesota counties · Download Minnesota frost dates (CSV)
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