| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F |
| Average First Frost Date: | Oct. 21 - Oct. 31 |
| Average Last Frost Date: | Apr. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 55d - Pre-Wisconsinan Drift Plains |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 47138 - Lexington, IN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 21 | 24 | 32 | 42 | 51 | 60 | 64 | 62 | 55 | 43 | 34 | 25 | 43 |
| Avg Max Temp (°F) | 39 | 45 | 56 | 66 | 75 | 83 | 87 | 85 | 79 | 68 | 55 | 43 | 65 |
| Avg Precip (In.) | 3.15 | 2.93 | 4.17 | 4.29 | 4.85 | 4.22 | 4.34 | 4.02 | 3.06 | 3.02 | 3.76 | 3.47 | 45.28 |