| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F |
| 2012 Hardiness Zone: | Zone 4b: -25°F to -20°F |
| 1990 Hardiness Zone: | Zone 4a: -30F to -25F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | May 1 - May 10 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 51a - St. Croix Outwash Plain |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 55016 - Cottage Grove, MN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 3 | 10 | 22 | 35 | 47 | 57 | 61 | 59 | 50 | 38 | 24 | 10 | 35 |
| Avg Max Temp (°F) | 22 | 29 | 41 | 58 | 70 | 79 | 83 | 80 | 72 | 59 | 41 | 26 | 55 |
| Avg Precip (In.) | .95 | .72 | 1.84 | 2.69 | 3.52 | 4.39 | 4.32 | 4.24 | 3.19 | 2.31 | 2.04 | .92 | 31.13 |