Fults, Illinois has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 46.2 °F (low) to 67.1 °F (high). Annual precipitation averages 43.6 Inches. Fults 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 | 23.2 °F | 41.0 °F | 2.65 in. |
| February | 26.9 °F | 46.3 °F | 2.46 in. |
| March | 35.0 °F | 56.2 °F | 3.7 in. |
| April | 45.3 °F | 68.2 °F | 4.95 in. |
| May | 56.0 °F | 77.3 °F | 5.05 in. |
| June | 65.0 °F | 86.1 °F | 4.34 in. |
| July | 68.7 °F | 89.2 °F | 4.04 in. |
| August | 66.9 °F | 88.1 °F | 3.35 in. |
| September | 58.1 °F | 81.6 °F | 3.36 in. |
| October | 46.5 °F | 70.3 °F | 3.14 in. |
| November | 36.0 °F | 56.2 °F | 3.61 in. |
| December | 27.2 °F | 45.0 °F | 2.91 in. |
| Annual | 46.2 °F | 67.1 °F | 43.56 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 | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |