Hopkins Park, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.8 °F (low) to 60.7 °F (high). Annual precipitation averages 39.3 Inches. Hopkins Park is located in USDA Plant Hardiness Zone 5b. 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 | 16.6 °F | 32.3 °F | 2.24 in. |
| February | 19.5 °F | 36.8 °F | 1.96 in. |
| March | 28.8 °F | 48.3 °F | 2.38 in. |
| April | 39.0 °F | 61.3 °F | 3.65 in. |
| May | 50.5 °F | 72.3 °F | 4.34 in. |
| June | 60.2 °F | 81.4 °F | 4.83 in. |
| July | 63.6 °F | 84.2 °F | 4.51 in. |
| August | 61.5 °F | 82.7 °F | 3.84 in. |
| September | 53.6 °F | 77.5 °F | 3.31 in. |
| October | 42.2 °F | 64.8 °F | 3.38 in. |
| November | 31.7 °F | 49.8 °F | 2.62 in. |
| December | 22.2 °F | 37.4 °F | 2.19 in. |
| Annual | 40.8 °F | 60.7 °F | 39.25 in. |
| 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 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 |