| 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 4b: -25F to -20F | |
| 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 56258 - Marshall, MN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 4 | 11 | 23 | 35 | 48 | 58 | 62 | 60 | 50 | 38 | 24 | 10 | 35 |
| Avg Max Temp (°F) | 23 | 30 | 41 | 57 | 72 | 81 | 84 | 82 | 74 | 61 | 41 | 27 | 56 |
| Avg Precip (In.) | .78 | .59 | 1.81 | 2.37 | 3.14 | 3.78 | 3.56 | 3.07 | 2.35 | 1.98 | 1.6 | .76 | 25.8 |