| 2023 Hardiness Zone: | Zone 4a: -30°F to -25°F | |
| 2012 Hardiness Zone: | Zone 3b: -35°F to -30°F | |
| 1990 Hardiness Zone: | Zone 3b: -35F to -30F | |
| Average First Frost Date: | Sep. 21 - Sep. 30 | |
| Average Last Frost Date: | May 11 - May 20 | |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year | |
| Ecoregion: | 50b - Minnesota/Wisconsin Upland Till Plain | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 56342 - Isle, MN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | -4 | 2 | 16 | 30 | 42 | 51 | 57 | 55 | 45 | 34 | 20 | 3 | 29 |
| Avg Max Temp (°F) | 18 | 26 | 37 | 53 | 67 | 75 | 80 | 77 | 68 | 55 | 37 | 22 | 51 |
| Avg Precip (In.) | .79 | .6 | 1.43 | 2.03 | 3.15 | 4.35 | 4.67 | 3.93 | 2.98 | 2.39 | 1.71 | .82 | 28.87 |