| 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. 1 - Oct. 10 | |
| Average Last Frost Date: | May 11 - May 20 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 47b - Des Moines Lobe | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 56001 - Mankato, MN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 2 | 9 | 22 | 34 | 47 | 57 | 61 | 59 | 48 | 37 | 23 | 9 | 34 |
| Avg Max Temp (°F) | 21 | 28 | 41 | 56 | 70 | 79 | 83 | 80 | 72 | 60 | 40 | 26 | 55 |
| Avg Precip (In.) | 1.04 | .68 | 2 | 2.81 | 3.47 | 4.34 | 4.05 | 4.27 | 2.8 | 2.24 | 1.91 | 1.05 | 30.65 |