Montezuma, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.3 °F (low) to 63.9 °F (high). Annual precipitation averages 43.5 Inches. Montezuma is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 19.9 °F | 35.8 °F | 2.91 in. |
| February | 23.0 °F | 40.7 °F | 2.5 in. |
| March | 32.1 °F | 51.9 °F | 3.24 in. |
| April | 42.6 °F | 65.3 °F | 4.6 in. |
| May | 53.4 °F | 75.7 °F | 4.65 in. |
| June | 62.5 °F | 84.0 °F | 4.97 in. |
| July | 65.3 °F | 86.6 °F | 4.3 in. |
| August | 63.0 °F | 85.4 °F | 3.28 in. |
| September | 55.2 °F | 80.1 °F | 3.12 in. |
| October | 44.1 °F | 68.0 °F | 3.63 in. |
| November | 33.8 °F | 52.6 °F | 3.45 in. |
| December | 25.1 °F | 40.5 °F | 2.83 in. |
| Annual | 43.3 °F | 63.9 °F | 43.48 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |