| 2023 Hardiness Zone: | Zone 4b: -25°F to -20°F |
| 2012 Hardiness Zone: | Zone 4b: -25°F to -20°F Zone 4a: -30°F to -25°F |
| 1990 Hardiness Zone: | Zone 4a: -30F to -25F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| Average Last Frost Date: | May 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 51i - Big Woods |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 55302 - Annandale, MN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 0 | 7 | 20 | 33 | 46 | 56 | 60 | 58 | 48 | 36 | 22 | 7 | 33 |
| Avg Max Temp (°F) | 20 | 27 | 39 | 56 | 70 | 79 | 83 | 80 | 71 | 59 | 39 | 25 | 54 |
| Avg Precip (In.) | .87 | .66 | 1.63 | 2.31 | 3.33 | 4.52 | 3.97 | 4.05 | 2.92 | 2.23 | 1.72 | .76 | 28.98 |