Kenilworth, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.6 °C (low) to 14.6 °C (high). Annual precipitation averages 997.2 Millimeters. Kenilworth 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.1 °C | 0.1 °C | 56.39 mm |
| February | -5.6 °C | 2.1 °C | 54.1 mm |
| March | -0.8 °C | 7.4 °C | 55.88 mm |
| April | 4.7 °C | 13.7 °C | 97.28 mm |
| May | 10.3 °C | 19.7 °C | 116.33 mm |
| June | 16 °C | 25.1 °C | 110.74 mm |
| July | 19.8 °C | 27.7 °C | 95.76 mm |
| August | 19.6 °C | 26.9 °C | 104.14 mm |
| September | 15.4 °C | 23.3 °C | 91.44 mm |
| October | 8.4 °C | 16.8 °C | 89.15 mm |
| November | 1.9 °C | 9.2 °C | 67.06 mm |
| December | -3.8 °C | 2.9 °C | 58.93 mm |
| Annual | 6.6 °C | 14.6 °C | 997.2 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| 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 |