Koshkonong, Missouri has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 45.5 °F (low) to 68.2 °F (high). Annual precipitation averages 48.5 Inches. Koshkonong is located in USDA Plant Hardiness Zone 7a. 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 | 24.2 °F | 44.7 °F | 3.08 in. |
| February | 27.5 °F | 49.6 °F | 3.28 in. |
| March | 35.2 °F | 59.0 °F | 4.6 in. |
| April | 44.8 °F | 69.4 °F | 5.38 in. |
| May | 54.3 °F | 76.6 °F | 5.35 in. |
| June | 62.8 °F | 84.5 °F | 3.67 in. |
| July | 66.7 °F | 89.0 °F | 3.9 in. |
| August | 65.2 °F | 88.5 °F | 3.6 in. |
| September | 57.1 °F | 81.3 °F | 3.9 in. |
| October | 45.3 °F | 70.3 °F | 3.74 in. |
| November | 35.4 °F | 57.9 °F | 4.49 in. |
| December | 27.4 °F | 47.3 °F | 3.5 in. |
| Annual | 45.5 °F | 68.2 °F | 48.49 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 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |