Marshall, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.2 °F (low) to 62.9 °F (high). Annual precipitation averages 44.4 Inches. Marshall is located in USDA Plant Hardiness Zone 6a. 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 | 19.1 °F | 35.2 °F | 2.96 in. |
| February | 22.0 °F | 40.1 °F | 2.58 in. |
| March | 31.1 °F | 51.1 °F | 3.31 in. |
| April | 41.4 °F | 64.2 °F | 4.65 in. |
| May | 52.1 °F | 74.5 °F | 4.87 in. |
| June | 61.1 °F | 82.9 °F | 5.09 in. |
| July | 64.0 °F | 85.5 °F | 4.18 in. |
| August | 61.8 °F | 84.2 °F | 3.5 in. |
| September | 54.1 °F | 78.9 °F | 3.12 in. |
| October | 42.9 °F | 66.8 °F | 3.59 in. |
| November | 32.9 °F | 51.8 °F | 3.6 in. |
| December | 24.1 °F | 39.7 °F | 2.97 in. |
| Annual | 42.2 °F | 62.9 °F | 44.42 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |