Evergreen Park, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.1 °C (low) to 15.4 °C (high). Annual precipitation averages 1010.4 Millimeters. Evergreen Park 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 | -7.6 °C | 0.2 °C | 55.12 mm |
| February | -6.1 °C | 2.2 °C | 52.58 mm |
| March | -1 °C | 8.1 °C | 60.2 mm |
| April | 4.7 °C | 14.9 °C | 99.57 mm |
| May | 10.8 °C | 21.1 °C | 117.86 mm |
| June | 16.4 °C | 26.7 °C | 109.98 mm |
| July | 19.4 °C | 29.1 °C | 113.28 mm |
| August | 18.5 °C | 28.1 °C | 105.66 mm |
| September | 14.3 °C | 24.5 °C | 82.04 mm |
| October | 7.4 °C | 17.4 °C | 88.39 mm |
| November | 1.2 °C | 9.6 °C | 66.29 mm |
| December | -4.4 °C | 3 °C | 59.44 mm |
| Annual | 6.1 °C | 15.4 °C | 1010.41 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 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |