Millersville, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 46.2 °F (low) to 67.8 °F (high). Annual precipitation averages 48.9 Inches. Millersville 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 24.2 °F | 42.2 °F | 3.3 in. |
| February | 27.8 °F | 47.8 °F | 3.34 in. |
| March | 35.6 °F | 57.6 °F | 4.55 in. |
| April | 45.5 °F | 68.9 °F | 5.37 in. |
| May | 55.9 °F | 77.6 °F | 5.5 in. |
| June | 64.6 °F | 86.3 °F | 4.05 in. |
| July | 68.2 °F | 89.3 °F | 4.16 in. |
| August | 65.8 °F | 88.4 °F | 3.27 in. |
| September | 57.6 °F | 82.0 °F | 3.42 in. |
| October | 45.7 °F | 70.9 °F | 3.68 in. |
| November | 35.9 °F | 57.1 °F | 4.55 in. |
| December | 28.0 °F | 45.5 °F | 3.75 in. |
| Annual | 46.2 °F | 67.8 °F | 48.94 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 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 | Dfa - Humid Continental Hot Summers With Year Around Precipitation |