Des Arc, Missouri has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 43.8 °F (low) to 68.2 °F (high). Annual precipitation averages 47.8 Inches. Des Arc 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 | 22.2 °F | 43.7 °F | 2.99 in. |
| February | 25.1 °F | 49.1 °F | 3.09 in. |
| March | 33.5 °F | 59.0 °F | 4.04 in. |
| April | 43.0 °F | 70.7 °F | 5.68 in. |
| May | 53.1 °F | 77.6 °F | 5.43 in. |
| June | 61.4 °F | 85.3 °F | 4.05 in. |
| July | 65.9 °F | 88.5 °F | 3.96 in. |
| August | 63.8 °F | 88.3 °F | 3.36 in. |
| September | 55.7 °F | 81.7 °F | 3.77 in. |
| October | 43.2 °F | 70.6 °F | 3.46 in. |
| November | 33.3 °F | 57.5 °F | 4.36 in. |
| December | 25.7 °F | 46.5 °F | 3.57 in. |
| Annual | 43.8 °F | 68.2 °F | 47.76 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 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |