Beach Park, 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 56.6 °F (high). Annual precipitation averages 37.1 Inches. Beach Park is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 15.9 °F | 30.2 °F | 1.94 in. |
| February | 18.6 °F | 33.6 °F | 2.12 in. |
| March | 27.6 °F | 43.3 °F | 2.28 in. |
| April | 37.6 °F | 54.2 °F | 3.85 in. |
| May | 47.9 °F | 65.4 °F | 4.34 in. |
| June | 58.0 °F | 75.5 °F | 4.22 in. |
| July | 64.0 °F | 80.7 °F | 3.46 in. |
| August | 63.5 °F | 79.5 °F | 3.55 in. |
| September | 55.8 °F | 72.9 °F | 3.56 in. |
| October | 43.8 °F | 60.6 °F | 3.19 in. |
| November | 32.3 °F | 47.2 °F | 2.44 in. |
| December | 22.0 °F | 35.6 °F | 2.18 in. |
| Annual | 40.6 °F | 56.6 °F | 37.13 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |