Marionville, Missouri has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 45.6 °F (low) to 66.9 °F (high). Annual precipitation averages 46.4 Inches. Marionville is located in USDA Plant Hardiness Zone 7a. 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 | 23.3 °F | 43.2 °F | 2.6 in. |
| February | 26.5 °F | 47.8 °F | 2.38 in. |
| March | 35.1 °F | 57.2 °F | 3.95 in. |
| April | 44.3 °F | 67.0 °F | 4.65 in. |
| May | 54.4 °F | 74.6 °F | 5.84 in. |
| June | 63.4 °F | 83.3 °F | 4.52 in. |
| July | 67.5 °F | 88.1 °F | 4.13 in. |
| August | 65.8 °F | 88.0 °F | 3.47 in. |
| September | 58.0 °F | 80.6 °F | 4.62 in. |
| October | 46.2 °F | 69.3 °F | 3.56 in. |
| November | 35.5 °F | 56.7 °F | 3.77 in. |
| December | 27.0 °F | 46.5 °F | 2.9 in. |
| Annual | 45.6 °F | 66.9 °F | 46.39 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |