Frost dates in St. Louis County, Minnesota
The average last spring frost in St. Louis County falls May 6 to Jun 5 and the average first fall frost Sep 8 to Oct 12, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 3a to 5a. Places: Aurora, Babbitt, Biwabik, Brookston, Buhl, Chisholm. 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 |
|---|---|---|---|---|
| 55602 | May 27 | Sep 23 | 3b | |
| 55702 | May 29 | Sep 18 | 4a | |
| 55703 | May 12 | Oct 1 | 3b | |
| 55705 | Aurora | May 12 | Oct 1 | 3b |
| 55706 | Babbitt | May 28 | Sep 14 | 3b |
| 55708 | Biwabik | May 12 | Oct 1 | 3b |
| 55710 | Mountain Iron | May 12 | Oct 1 | 3b |
| 55711 | Brookston | May 26 | Sep 23 | 4a |
| 55713 | Buhl | Jun 5 | Sep 8 | 3b |
| 55717 | May 27 | Sep 20 | 4a | |
| 55719 | Chisholm | Jun 5 | Sep 8 | 3b |
| 55723 | Cook | Jun 1 | Sep 15 | 3b |
| 55724 | May 27 | Sep 20 | 3b | |
| 55725 | Jun 2 | Sep 15 | 3b | |
| 55732 | May 28 | Sep 14 | 3a | |
| 55734 | Eveleth | May 12 | Oct 1 | 3b |
| 55736 | Floodwood | May 29 | Sep 18 | 4a |
| 55738 | May 27 | Sep 20 | 3b | |
| 55741 | Gilbert | May 12 | Oct 1 | 3b |
| 55746 | Hibbing | Jun 5 | Sep 8 | 3b |
| 55750 | Hoyt Lakes | May 28 | Sep 14 | 3b |
| 55751 | Iron Junction | Jun 5 | Sep 8 | 3b |
| 55758 | Kinney | May 12 | Oct 1 | 3b |
| 55763 | May 27 | Sep 20 | 3b | |
| 55765 | Meadowlands | May 29 | Sep 18 | 3b |
| 55768 | Mountain Iron | May 12 | Oct 1 | 3b |
| 55771 | Nett Lake | Jun 2 | Sep 15 | 3b |
| 55779 | May 13 | Oct 1 | 4a | |
| 55782 | Soudan | May 28 | Sep 14 | 3a |
| 55790 | Tower | May 12 | Oct 1 | 3a |
| 55792 | Virginia | May 12 | Oct 1 | 3b |
| 55802 | Duluth | May 14 | Oct 12 | 5a |
| 55803 | Rice Lake | May 21 | Sep 27 | 4a |
| 55804 | Duluth | May 14 | Oct 12 | 4b |
| 55805 | Duluth | May 14 | Oct 12 | 4b |
| 55806 | Duluth | May 14 | Oct 12 | 4b |
| 55807 | Duluth | May 14 | Oct 12 | 4b |
| 55808 | Duluth | May 6 | Oct 9 | 4b |
| 55810 | Hermantown | May 13 | Oct 1 | 4b |
| 55811 | Hermantown | May 13 | Oct 1 | 4b |
| 55812 | Duluth | May 14 | Oct 12 | 4b |
| 55814 | Hermantown | May 13 | Oct 1 | 4b |
Nearby counties
Lake County Carlton County Itasca County Aitkin County Pine County Koochiching County
All Minnesota counties · Download Minnesota frost dates (CSV)
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