Waynesville, 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 66.9 °F (high). Annual precipitation averages 46 Inches. Waynesville is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 21.6 °F | 42.0 °F | 2.63 in. |
| February | 25.0 °F | 46.9 °F | 2.41 in. |
| March | 33.0 °F | 57.0 °F | 3.85 in. |
| April | 43.4 °F | 68.4 °F | 4.69 in. |
| May | 53.7 °F | 76.2 °F | 5.26 in. |
| June | 62.6 °F | 83.7 °F | 4.39 in. |
| July | 66.5 °F | 88.1 °F | 4.34 in. |
| August | 64.6 °F | 87.8 °F | 4.24 in. |
| September | 55.8 °F | 80.4 °F | 4.06 in. |
| October | 44.3 °F | 69.9 °F | 3.46 in. |
| November | 34.2 °F | 56.3 °F | 3.74 in. |
| December | 25.7 °F | 45.6 °F | 2.89 in. |
| Annual | 44.2 °F | 66.9 °F | 45.96 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| 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 | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |