Hallsville, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44.2 °F (low) to 64.1 °F (high). Annual precipitation averages 42.3 Inches. Hallsville 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 | 19.7 °F | 37.4 °F | 2.02 in. |
| February | 23.6 °F | 42.2 °F | 2.14 in. |
| March | 32.8 °F | 53.8 °F | 3.0 in. |
| April | 43.5 °F | 65.0 °F | 4.58 in. |
| May | 54.1 °F | 73.9 °F | 5.05 in. |
| June | 63.2 °F | 82.7 °F | 4.95 in. |
| July | 67.0 °F | 86.7 °F | 4.35 in. |
| August | 65.1 °F | 85.9 °F | 3.79 in. |
| September | 56.4 °F | 79.1 °F | 4.15 in. |
| October | 45.0 °F | 67.0 °F | 3.31 in. |
| November | 34.5 °F | 53.5 °F | 2.87 in. |
| December | 25.4 °F | 41.6 °F | 2.09 in. |
| Annual | 44.2 °F | 64.1 °F | 42.3 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 |