Gainesville, Missouri has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 46.5 °F (low) to 69.2 °F (high). Annual precipitation averages 46.5 Inches. Gainesville is located in USDA Plant Hardiness Zone 7a. 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 | 25.4 °F | 46.1 °F | 2.99 in. |
| February | 28.6 °F | 51.0 °F | 2.94 in. |
| March | 36.3 °F | 59.8 °F | 4.45 in. |
| April | 45.6 °F | 70.3 °F | 5.13 in. |
| May | 55.0 °F | 77.1 °F | 4.97 in. |
| June | 63.9 °F | 85.4 °F | 3.71 in. |
| July | 67.6 °F | 89.7 °F | 3.78 in. |
| August | 65.8 °F | 89.3 °F | 3.19 in. |
| September | 58.0 °F | 82.3 °F | 3.95 in. |
| October | 46.2 °F | 71.6 °F | 3.68 in. |
| November | 36.6 °F | 59.3 °F | 4.4 in. |
| December | 28.5 °F | 48.8 °F | 3.27 in. |
| Annual | 46.5 °F | 69.2 °F | 46.46 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 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 |