Huntsville, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.8 °F (low) to 64.1 °F (high). Annual precipitation averages 42.3 Inches. Huntsville 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 | 18.9 °F | 36.9 °F | 1.81 in. |
| February | 22.7 °F | 42.1 °F | 2.05 in. |
| March | 32.7 °F | 53.6 °F | 3.06 in. |
| April | 43.1 °F | 65.1 °F | 4.51 in. |
| May | 53.9 °F | 74.1 °F | 5.24 in. |
| June | 63.4 °F | 83.2 °F | 5.21 in. |
| July | 67.2 °F | 87.1 °F | 4.64 in. |
| August | 64.8 °F | 85.9 °F | 3.85 in. |
| September | 56.1 °F | 78.8 °F | 3.92 in. |
| October | 44.7 °F | 67.3 °F | 3.29 in. |
| November | 33.8 °F | 53.5 °F | 2.68 in. |
| December | 24.3 °F | 41.4 °F | 2.05 in. |
| Annual | 43.8 °F | 64.1 °F | 42.31 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 |