Chili, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1 °C (low) to 11.9 °C (high). Annual precipitation averages 835.4 Millimeters. Chili is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -14.8 °C | -5 °C | 27.69 mm |
| February | -13.3 °C | -2.4 °C | 25.65 mm |
| March | -6.7 °C | 4.3 °C | 42.93 mm |
| April | 0.4 °C | 12.2 °C | 78.99 mm |
| May | 7.3 °C | 19.2 °C | 97.03 mm |
| June | 12.8 °C | 24.3 °C | 119.63 mm |
| July | 14.9 °C | 26.7 °C | 94.49 mm |
| August | 13.8 °C | 25.6 °C | 100.08 mm |
| September | 9.2 °C | 21.4 °C | 92.71 mm |
| October | 2.6 °C | 13.8 °C | 73.15 mm |
| November | -3.8 °C | 5.2 °C | 46.74 mm |
| December | -10.6 °C | -2 °C | 36.32 mm |
| Annual | 1 °C | 11.9 °C | 835.41 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |