Maeystown, Illinois has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 46.9 °F (low) to 66.7 °F (high). Annual precipitation averages 43.8 Inches. Maeystown 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 23.5 °F | 40.7 °F | 2.72 in. |
| February | 27.1 °F | 45.9 °F | 2.5 in. |
| March | 35.5 °F | 55.9 °F | 3.75 in. |
| April | 46.1 °F | 67.8 °F | 5.0 in. |
| May | 56.6 °F | 76.7 °F | 5.01 in. |
| June | 65.4 °F | 85.6 °F | 4.42 in. |
| July | 69.3 °F | 88.9 °F | 4.01 in. |
| August | 67.2 °F | 87.6 °F | 3.33 in. |
| September | 59.2 °F | 81.1 °F | 3.34 in. |
| October | 47.7 °F | 69.7 °F | 3.13 in. |
| November | 36.7 °F | 55.8 °F | 3.6 in. |
| December | 28.1 °F | 44.9 °F | 2.94 in. |
| Annual | 46.9 °F | 66.7 °F | 43.75 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| 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 |