| 2023 Hardiness Zone: | Zone 3b: -35°F to -30°F Zone 4a: -30°F to -25°F | |
| 2012 Hardiness Zone: | Zone 3b: -35°F to -30°F Zone 3a: -40°F to -35°F | |
| 1990 Hardiness Zone: | Zone 3a: -40F to -35F | |
| Average First Frost Date: | Oct. 1 - Oct. 10 | |
| Average Last Frost Date: | May 21 - May 31 | |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year | |
| Ecoregion: | 50o - Glacial Lakes Upham and Aitken | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 55724 - Cotton, MN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | -9 | -2 | 12 | 26 | 38 | 47 | 52 | 50 | 41 | 31 | 17 | 0 | 25 |
| Avg Max Temp (°F) | 17 | 25 | 36 | 52 | 66 | 74 | 78 | 75 | 66 | 53 | 35 | 21 | 50 |
| Avg Precip (In.) | .92 | .61 | 1.07 | 1.92 | 2.64 | 4.4 | 4.74 | 3.61 | 3.25 | 2.37 | 1.66 | .79 | 27.98 |