| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°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: | May 1 - May 10 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 55b - Loamy High Lime Till Plains |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 47960 - Monticello, IN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 16 | 19 | 29 | 39 | 50 | 59 | 63 | 61 | 53 | 41 | 32 | 22 | 40 |
| Avg Max Temp (°F) | 32 | 37 | 49 | 62 | 73 | 81 | 85 | 82 | 77 | 64 | 50 | 37 | 61 |
| Avg Precip (In.) | 2.06 | 1.8 | 3.03 | 3.56 | 4.07 | 4.33 | 3.75 | 3.8 | 3.19 | 2.82 | 3.15 | 2.75 | 38.33 |