Lisle, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.8 °C (low) to 15.6 °C (high). Annual precipitation averages 1014.2 Millimeters. Lisle is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.8 °C | -0.2 °C | 54.61 mm |
| February | -7.4 °C | 2 °C | 52.83 mm |
| March | -2.1 °C | 8.5 °C | 60.45 mm |
| April | 3.6 °C | 15.7 °C | 100.84 mm |
| May | 9.7 °C | 21.9 °C | 123.95 mm |
| June | 15.3 °C | 27.3 °C | 116.59 mm |
| July | 17.8 °C | 29.4 °C | 100.08 mm |
| August | 17 °C | 28.4 °C | 106.17 mm |
| September | 12.7 °C | 24.8 °C | 84.07 mm |
| October | 5.9 °C | 17.6 °C | 90.93 mm |
| November | -0.2 °C | 9.4 °C | 66.04 mm |
| December | -5.6 °C | 2.7 °C | 57.66 mm |
| Annual | 4.8 °C | 15.6 °C | 1014.22 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 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 |