Channahon, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.6 °F (low) to 60.4 °F (high). Annual precipitation averages 38.9 Inches. Channahon is located in USDA Plant Hardiness Zone 5b. 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 | 15.9 °F | 31.7 °F | 2.15 in. |
| February | 18.8 °F | 35.7 °F | 1.85 in. |
| March | 28.4 °F | 47.7 °F | 2.39 in. |
| April | 38.8 °F | 60.8 °F | 3.85 in. |
| May | 49.9 °F | 71.8 °F | 4.74 in. |
| June | 60.0 °F | 81.3 °F | 4.63 in. |
| July | 63.7 °F | 84.7 °F | 4.22 in. |
| August | 62.1 °F | 82.9 °F | 3.96 in. |
| September | 54.2 °F | 77.4 °F | 3.39 in. |
| October | 42.3 °F | 64.2 °F | 3.12 in. |
| November | 31.6 °F | 49.3 °F | 2.48 in. |
| December | 21.7 °F | 36.9 °F | 2.14 in. |
| Annual | 40.6 °F | 60.4 °F | 38.92 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 5b : -15°F to -10°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 |