Lemay, Missouri has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 47.3 °F (low) to 66.7 °F (high). Annual precipitation averages 44.7 Inches. Lemay 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 | 23.6 °F | 40.4 °F | 2.75 in. |
| February | 27.1 °F | 45.8 °F | 2.44 in. |
| March | 35.8 °F | 55.7 °F | 3.58 in. |
| April | 46.6 °F | 68.1 °F | 4.69 in. |
| May | 57.2 °F | 76.9 °F | 5.27 in. |
| June | 66.1 °F | 85.6 °F | 4.65 in. |
| July | 69.9 °F | 89.1 °F | 4.2 in. |
| August | 68.1 °F | 87.7 °F | 3.8 in. |
| September | 59.7 °F | 81.1 °F | 3.39 in. |
| October | 48.3 °F | 69.6 °F | 3.46 in. |
| November | 37.0 °F | 55.7 °F | 3.64 in. |
| December | 28.2 °F | 44.7 °F | 2.83 in. |
| Annual | 47.3 °F | 66.7 °F | 44.7 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 | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |