| 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: | 52c - Rochester/Paleozoic Plateau Upland | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 55976 - Stewartville, MN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 4 | 10 | 22 | 35 | 46 | 56 | 60 | 58 | 49 | 37 | 24 | 10 | 34 |
| Avg Max Temp (°F) | 20 | 27 | 39 | 55 | 68 | 77 | 81 | 78 | 70 | 58 | 39 | 25 | 53 |
| Avg Precip (In.) | .96 | .75 | 1.88 | 3.03 | 3.61 | 4.04 | 4.58 | 4.4 | 3.19 | 2.25 | 2.04 | 1.03 | 31.76 |