| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F |
| 2012 Hardiness Zone: | Zone 4b: -25°F to -20°F |
| 1990 Hardiness Zone: | Zone 4a: -30F to -25F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| Average Last Frost Date: | May 1 - May 10 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 51i - Big Woods |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 55318 - Chaska, MN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 3 | 10 | 22 | 35 | 48 | 57 | 62 | 59 | 50 | 38 | 24 | 10 | 35 |
| Avg Max Temp (°F) | 23 | 30 | 42 | 59 | 73 | 81 | 85 | 82 | 74 | 61 | 41 | 28 | 57 |
| Avg Precip (In.) | .88 | .61 | 1.76 | 2.39 | 3.59 | 4.31 | 4.34 | 4.39 | 2.95 | 2.16 | 1.95 | .82 | 30.16 |