Perryville, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 45.3 °F (low) to 66.8 °F (high). Annual precipitation averages 45.8 Inches. Perryville 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 | 23.2 °F | 41.5 °F | 2.87 in. |
| February | 26.6 °F | 46.8 °F | 2.81 in. |
| March | 34.5 °F | 56.6 °F | 3.74 in. |
| April | 44.4 °F | 67.7 °F | 5.08 in. |
| May | 55.0 °F | 76.6 °F | 5.86 in. |
| June | 63.8 °F | 85.0 °F | 4.32 in. |
| July | 67.6 °F | 88.3 °F | 3.8 in. |
| August | 65.2 °F | 87.2 °F | 3.34 in. |
| September | 56.6 °F | 80.8 °F | 3.27 in. |
| October | 45.0 °F | 69.9 °F | 3.36 in. |
| November | 35.1 °F | 56.5 °F | 4.25 in. |
| December | 26.9 °F | 44.9 °F | 3.14 in. |
| Annual | 45.3 °F | 66.8 °F | 45.84 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 6b : -5°F to 0°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |