Chandlerville, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42 °F (low) to 63.3 °F (high). Annual precipitation averages 40.5 Inches. Chandlerville 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 | 17.3 °F | 34.6 °F | 2.13 in. |
| February | 20.5 °F | 39.3 °F | 2.01 in. |
| March | 30.4 °F | 51.4 °F | 2.67 in. |
| April | 40.8 °F | 64.3 °F | 3.85 in. |
| May | 52.8 °F | 74.8 °F | 4.96 in. |
| June | 62.2 °F | 83.5 °F | 4.91 in. |
| July | 65.3 °F | 86.6 °F | 4.55 in. |
| August | 62.9 °F | 85.3 °F | 3.39 in. |
| September | 54.6 °F | 80.0 °F | 3.65 in. |
| October | 42.4 °F | 67.3 °F | 3.08 in. |
| November | 32.0 °F | 52.2 °F | 2.93 in. |
| December | 23.2 °F | 39.9 °F | 2.4 in. |
| Annual | 42 °F | 63.3 °F | 40.53 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 |