| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°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: | Rare Over 86°F |
Annual Climate Data for ZIP Code 46777 - Ossian, IN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 16 | 19 | 28 | 39 | 49 | 59 | 63 | 61 | 53 | 41 | 33 | 22 | 40 |
| Avg Max Temp (°F) | 31 | 35 | 47 | 59 | 71 | 80 | 84 | 82 | 75 | 63 | 48 | 36 | 59 |
| Avg Precip (In.) | 2.02 | 1.85 | 2.75 | 3.46 | 3.77 | 4.05 | 3.78 | 3.56 | 2.92 | 2.61 | 3.01 | 2.68 | 36.46 |