Chili, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 33.8 °F (low) to 53.5 °F (high). Annual precipitation averages 32.9 Inches. 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 | 5.4 °F | 23.0 °F | 1.09 in. |
| February | 8.1 °F | 27.6 °F | 1.01 in. |
| March | 19.9 °F | 39.8 °F | 1.69 in. |
| April | 32.8 °F | 54.0 °F | 3.11 in. |
| May | 45.1 °F | 66.6 °F | 3.82 in. |
| June | 55.1 °F | 75.7 °F | 4.71 in. |
| July | 58.8 °F | 80.1 °F | 3.72 in. |
| August | 56.8 °F | 78.0 °F | 3.94 in. |
| September | 48.5 °F | 70.5 °F | 3.65 in. |
| October | 36.6 °F | 56.9 °F | 2.88 in. |
| November | 25.1 °F | 41.4 °F | 1.84 in. |
| December | 12.9 °F | 28.4 °F | 1.43 in. |
| Annual | 33.8 °F | 53.5 °F | 32.89 in. |
| 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 : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |