| 2023 Hardiness Zone: | 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 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 47g - Lower St. Croix and Vermillion Valleys |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 54023 - Roberts, WI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 2 | 9 | 21 | 33 | 46 | 55 | 60 | 58 | 49 | 37 | 24 | 9 | 34 |
| Avg Max Temp (°F) | 22 | 28 | 40 | 57 | 70 | 78 | 82 | 80 | 71 | 59 | 40 | 26 | 54 |
| Avg Precip (In.) | .98 | .74 | 1.75 | 2.71 | 3.49 | 4.53 | 4.34 | 4.53 | 3.53 | 2.38 | 1.94 | .93 | 31.84 |