Dupont, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.7 °F (low) to 64.3 °F (high). Annual precipitation averages 48.7 Inches. Dupont is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 22.2 °F | 38.8 °F | 3.44 in. |
| February | 24.3 °F | 43.2 °F | 3.06 in. |
| March | 32.8 °F | 53.7 °F | 4.17 in. |
| April | 42.9 °F | 65.5 °F | 5.01 in. |
| May | 53.1 °F | 74.5 °F | 5.24 in. |
| June | 61.3 °F | 82.2 °F | 4.94 in. |
| July | 64.7 °F | 85.2 °F | 4.38 in. |
| August | 62.9 °F | 84.4 °F | 3.98 in. |
| September | 55.5 °F | 79.1 °F | 3.42 in. |
| October | 43.9 °F | 67.5 °F | 3.49 in. |
| November | 33.9 °F | 54.4 °F | 3.67 in. |
| December | 26.6 °F | 43.1 °F | 3.94 in. |
| Annual | 43.7 °F | 64.3 °F | 48.74 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 |