| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F | |
| 2012 Hardiness Zone: | Zone 5b: -15°F to -10°F | |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F | |
| Average First Frost Date: | Oct. 11 - Oct. 20 | |
| Average Last Frost Date: | Apr. 21 - Apr. 30 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 55b - Loamy High Lime Till Plains | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 31 - 45 days Over 86°F |
Annual Climate Data for ZIP Code 46923 - Delphi, IN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 17 | 20 | 30 | 39 | 50 | 60 | 63 | 61 | 53 | 42 | 33 | 22 | 41 |
| Avg Max Temp (°F) | 33 | 38 | 50 | 63 | 74 | 82 | 85 | 83 | 77 | 65 | 50 | 37 | 61 |
| Avg Precip (In.) | 1.96 | 1.91 | 2.91 | 3.47 | 4.01 | 4.14 | 4.09 | 3.97 | 2.97 | 2.7 | 3.08 | 2.72 | 37.92 |