| 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: | Sep. 21 - Sep. 30 | |
| Average Last Frost Date: | May 1 - May 10 | |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year | |
| Ecoregion: | 47b - Des Moines Lobe | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 56256 - Madison, MN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 0 | 8 | 20 | 33 | 46 | 56 | 61 | 58 | 47 | 35 | 21 | 6 | 33 |
| Avg Max Temp (°F) | 21 | 28 | 39 | 56 | 70 | 79 | 84 | 81 | 73 | 60 | 40 | 26 | 55 |
| Avg Precip (In.) | .75 | .65 | 1.52 | 2.18 | 2.9 | 3.8 | 3.49 | 2.93 | 2.18 | 2.22 | 1.32 | .48 | 24.43 |