Wortham, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44.8 °F (low) to 66.6 °F (high). Annual precipitation averages 45.1 Inches. Wortham is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 22.8 °F | 41.9 °F | 2.65 in. |
| February | 25.9 °F | 47.2 °F | 2.65 in. |
| March | 33.9 °F | 56.8 °F | 3.86 in. |
| April | 44.1 °F | 67.9 °F | 5.34 in. |
| May | 54.1 °F | 75.8 °F | 5.38 in. |
| June | 62.4 °F | 83.8 °F | 4.02 in. |
| July | 66.6 °F | 87.6 °F | 3.92 in. |
| August | 64.7 °F | 86.9 °F | 3.56 in. |
| September | 56.6 °F | 80.2 °F | 3.38 in. |
| October | 45.2 °F | 69.4 °F | 3.37 in. |
| November | 34.8 °F | 56.1 °F | 3.96 in. |
| December | 26.8 °F | 45.0 °F | 3.03 in. |
| Annual | 44.8 °F | 66.6 °F | 45.12 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| 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 | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |