Zeigler, Illinois has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 46.2 °F (low) to 66.5 °F (high). Annual precipitation averages 46.6 Inches. Zeigler 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 | 23.9 °F | 40.7 °F | 3.24 in. |
| February | 27.2 °F | 45.7 °F | 2.96 in. |
| March | 35.6 °F | 55.9 °F | 4.17 in. |
| April | 45.7 °F | 67.5 °F | 5.28 in. |
| May | 56.1 °F | 76.5 °F | 5.26 in. |
| June | 64.7 °F | 85.1 °F | 4.62 in. |
| July | 68.1 °F | 87.9 °F | 3.83 in. |
| August | 65.6 °F | 87.0 °F | 3.01 in. |
| September | 57.4 °F | 81.2 °F | 3.21 in. |
| October | 45.7 °F | 69.8 °F | 3.47 in. |
| November | 35.8 °F | 56.2 °F | 4.13 in. |
| December | 28.1 °F | 45.0 °F | 3.42 in. |
| Annual | 46.2 °F | 66.5 °F | 46.6 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |