Fults, Illinois has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.9 °C (low) to 19.5 °C (high). Annual precipitation averages 1106.4 Millimeters. 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 | -4.9 °C | 5 °C | 67.31 mm |
| February | -2.8 °C | 7.9 °C | 62.48 mm |
| March | 1.7 °C | 13.4 °C | 93.98 mm |
| April | 7.4 °C | 20.1 °C | 125.73 mm |
| May | 13.3 °C | 25.2 °C | 128.27 mm |
| June | 18.3 °C | 30.1 °C | 110.24 mm |
| July | 20.4 °C | 31.8 °C | 102.62 mm |
| August | 19.4 °C | 31.2 °C | 85.09 mm |
| September | 14.5 °C | 27.6 °C | 85.34 mm |
| October | 8.1 °C | 21.3 °C | 79.76 mm |
| November | 2.2 °C | 13.4 °C | 91.69 mm |
| December | -2.7 °C | 7.2 °C | 73.91 mm |
| Annual | 7.9 °C | 19.5 °C | 1106.42 mm |
| 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 : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |