| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°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. 11 - Apr. 20 |
| 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 47111 - Charlestown, IN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 22 | 25 | 33 | 42 | 52 | 60 | 64 | 63 | 55 | 44 | 35 | 26 | 43 |
| Avg Max Temp (°F) | 41 | 47 | 58 | 68 | 77 | 85 | 88 | 87 | 80 | 70 | 56 | 45 | 67 |
| Avg Precip (In.) | 3.15 | 2.95 | 4.33 | 4.21 | 5.14 | 4.03 | 4.23 | 3.91 | 3.11 | 2.89 | 3.81 | 3.91 | 45.66 |