Chandlerville, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.6 °C (low) to 17.4 °C (high). Annual precipitation averages 1029.5 Millimeters. 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 | -8.2 °C | 1.4 °C | 54.1 mm |
| February | -6.4 °C | 4.1 °C | 51.05 mm |
| March | -0.9 °C | 10.8 °C | 67.82 mm |
| April | 4.9 °C | 17.9 °C | 97.79 mm |
| May | 11.6 °C | 23.8 °C | 125.98 mm |
| June | 16.8 °C | 28.6 °C | 124.71 mm |
| July | 18.5 °C | 30.3 °C | 115.57 mm |
| August | 17.2 °C | 29.6 °C | 86.11 mm |
| September | 12.6 °C | 26.7 °C | 92.71 mm |
| October | 5.8 °C | 19.6 °C | 78.23 mm |
| November | 0 °C | 11.2 °C | 74.42 mm |
| December | -4.9 °C | 4.4 °C | 60.96 mm |
| Annual | 5.6 °C | 17.4 °C | 1029.45 mm |
| 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 : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |