Marshall, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44.7 °F (low) to 64.7 °F (high). Annual precipitation averages 41.2 Inches. Marshall is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 20.3 °F | 37.9 °F | 1.52 in. |
| February | 24.1 °F | 42.9 °F | 1.87 in. |
| March | 33.7 °F | 54.3 °F | 2.82 in. |
| April | 43.8 °F | 65.5 °F | 4.33 in. |
| May | 55.0 °F | 75.0 °F | 5.28 in. |
| June | 64.3 °F | 83.8 °F | 5.08 in. |
| July | 68.0 °F | 87.6 °F | 4.53 in. |
| August | 65.6 °F | 86.4 °F | 3.84 in. |
| September | 56.9 °F | 79.6 °F | 4.04 in. |
| October | 45.4 °F | 67.6 °F | 3.31 in. |
| November | 34.4 °F | 53.8 °F | 2.55 in. |
| December | 25.3 °F | 42.0 °F | 1.99 in. |
| Annual | 44.7 °F | 64.7 °F | 41.16 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 100-125 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 |