| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F 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 21 - May 31 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 51d - Central Sand Ridges |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 54945 - Iola, WI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 4 | 9 | 20 | 32 | 44 | 53 | 58 | 56 | 47 | 36 | 24 | 11 | 33 |
| Avg Max Temp (°F) | 23 | 29 | 40 | 55 | 68 | 77 | 81 | 78 | 70 | 58 | 41 | 28 | 54 |
| Avg Precip (In.) | 1.23 | 1.01 | 2.06 | 2.9 | 3.6 | 3.79 | 4.16 | 4.15 | 3.68 | 2.43 | 2.31 | 1.35 | 32.67 |