| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | May 1 - May 10 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 55a - Clayey High Lime Till Plains |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 46783 - Roanoke, IN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 16 | 19 | 29 | 38 | 49 | 59 | 62 | 60 | 53 | 42 | 33 | 22 | 40 |
| Avg Max Temp (°F) | 31 | 36 | 48 | 60 | 72 | 81 | 84 | 82 | 76 | 64 | 49 | 36 | 60 |
| Avg Precip (In.) | 2.05 | 1.87 | 2.78 | 3.51 | 3.79 | 4.1 | 3.81 | 3.6 | 3.01 | 2.68 | 3.09 | 2.76 | 37.03 |