Cape Girardeau, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 47.2 °F (low) to 68.2 °F (high). Annual precipitation averages 48.9 Inches. Cape Girardeau 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 | 25.4 °F | 42.8 °F | 3.42 in. |
| February | 28.8 °F | 48.2 °F | 3.42 in. |
| March | 37.0 °F | 57.7 °F | 4.56 in. |
| April | 46.7 °F | 69.0 °F | 5.42 in. |
| May | 57.1 °F | 78.0 °F | 5.73 in. |
| June | 65.7 °F | 86.7 °F | 4.1 in. |
| July | 69.0 °F | 89.5 °F | 3.83 in. |
| August | 66.5 °F | 88.4 °F | 3.08 in. |
| September | 58.3 °F | 82.3 °F | 3.34 in. |
| October | 46.4 °F | 71.4 °F | 3.72 in. |
| November | 36.4 °F | 57.6 °F | 4.66 in. |
| December | 29.1 °F | 46.3 °F | 3.63 in. |
| Annual | 47.2 °F | 68.2 °F | 48.91 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 |