Summersville, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 45.1 °F (low) to 66.7 °F (high). Annual precipitation averages 47.4 Inches. Summersville is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 23.4 °F | 42.7 °F | 2.7 in. |
| February | 26.8 °F | 48.0 °F | 2.9 in. |
| March | 34.5 °F | 57.5 °F | 4.25 in. |
| April | 44.5 °F | 67.8 °F | 5.24 in. |
| May | 53.9 °F | 75.5 °F | 5.8 in. |
| June | 62.6 °F | 83.1 °F | 3.96 in. |
| July | 66.3 °F | 87.4 °F | 4.12 in. |
| August | 64.7 °F | 86.9 °F | 4.0 in. |
| September | 56.5 °F | 80.0 °F | 3.94 in. |
| October | 45.3 °F | 69.1 °F | 3.56 in. |
| November | 35.5 °F | 56.6 °F | 3.96 in. |
| December | 26.9 °F | 45.7 °F | 2.97 in. |
| Annual | 45.1 °F | 66.7 °F | 47.4 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |