Versailles, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.7 °F (low) to 63 °F (high). Annual precipitation averages 39.1 Inches. Versailles is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 18.2 °F | 35.0 °F | 2.02 in. |
| February | 21.8 °F | 40.1 °F | 1.92 in. |
| March | 31.1 °F | 51.5 °F | 2.62 in. |
| April | 41.7 °F | 64.0 °F | 3.99 in. |
| May | 53.0 °F | 73.8 °F | 4.78 in. |
| June | 62.3 °F | 82.5 °F | 4.72 in. |
| July | 65.7 °F | 86.1 °F | 3.98 in. |
| August | 63.3 °F | 84.9 °F | 3.48 in. |
| September | 54.8 °F | 78.8 °F | 3.52 in. |
| October | 43.5 °F | 66.6 °F | 3.09 in. |
| November | 32.8 °F | 52.4 °F | 2.84 in. |
| December | 23.6 °F | 40.0 °F | 2.16 in. |
| Annual | 42.7 °F | 63 °F | 39.12 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |