| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°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: | 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 47872 - Rockville, IN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 19 | 23 | 33 | 43 | 52 | 61 | 65 | 63 | 55 | 44 | 35 | 24 | 43 |
| Avg Max Temp (°F) | 36 | 42 | 53 | 65 | 75 | 84 | 87 | 85 | 79 | 68 | 53 | 40 | 64 |
| Avg Precip (In.) | 2.51 | 2.24 | 3.63 | 4.08 | 4.76 | 4.24 | 4.83 | 4.36 | 3.09 | 3.03 | 4.22 | 3.47 | 44.47 |