Montgomery, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44.6 °F (low) to 65.2 °F (high). Annual precipitation averages 47.9 Inches. Montgomery is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 22.4 °F | 39.2 °F | 3.48 in. |
| February | 25.0 °F | 43.9 °F | 2.85 in. |
| March | 33.5 °F | 54.3 °F | 4.07 in. |
| April | 43.5 °F | 66.3 °F | 5.01 in. |
| May | 54.5 °F | 75.6 °F | 5.61 in. |
| June | 62.9 °F | 83.4 °F | 4.83 in. |
| July | 65.8 °F | 86.5 °F | 4.22 in. |
| August | 63.9 °F | 85.6 °F | 3.13 in. |
| September | 56.5 °F | 80.3 °F | 3.77 in. |
| October | 45.2 °F | 68.8 °F | 3.44 in. |
| November | 34.9 °F | 54.8 °F | 3.94 in. |
| December | 27.2 °F | 43.6 °F | 3.59 in. |
| Annual | 44.6 °F | 65.2 °F | 47.94 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°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 |