Clarksburg, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 45.2 °F (low) to 65.2 °F (high). Annual precipitation averages 43.1 Inches. Clarksburg 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 | 21.3 °F | 39.4 °F | 2.03 in. |
| February | 25.2 °F | 44.5 °F | 2.16 in. |
| March | 34.2 °F | 55.4 °F | 3.07 in. |
| April | 44.4 °F | 65.9 °F | 4.86 in. |
| May | 54.9 °F | 74.9 °F | 5.2 in. |
| June | 63.9 °F | 82.9 °F | 4.38 in. |
| July | 68.0 °F | 87.2 °F | 4.5 in. |
| August | 66.1 °F | 86.8 °F | 3.87 in. |
| September | 57.6 °F | 79.4 °F | 4.1 in. |
| October | 46.1 °F | 67.9 °F | 3.65 in. |
| November | 35.1 °F | 54.4 °F | 3.05 in. |
| December | 25.8 °F | 43.4 °F | 2.2 in. |
| Annual | 45.2 °F | 65.2 °F | 43.07 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 | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |