Chicago Ridge, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.4 °F (low) to 60.1 °F (high). Annual precipitation averages 39.7 Inches. Chicago Ridge is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 17.7 °F | 31.9 °F | 2.17 in. |
| February | 20.4 °F | 35.6 °F | 2.06 in. |
| March | 29.7 °F | 46.4 °F | 2.39 in. |
| April | 40.1 °F | 59.8 °F | 3.97 in. |
| May | 51.0 °F | 70.9 °F | 4.76 in. |
| June | 61.1 °F | 80.9 °F | 4.33 in. |
| July | 66.0 °F | 85.4 °F | 4.3 in. |
| August | 64.5 °F | 83.2 °F | 4.2 in. |
| September | 56.8 °F | 76.9 °F | 3.22 in. |
| October | 44.5 °F | 63.6 °F | 3.45 in. |
| November | 33.5 °F | 49.0 °F | 2.55 in. |
| December | 23.4 °F | 37.2 °F | 2.34 in. |
| Annual | 42.4 °F | 60.1 °F | 39.74 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |