Peoria Heights, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.9 °F (low) to 61.1 °F (high). Annual precipitation averages 39.2 Inches. Peoria Heights 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 15.5 °F | 32.1 °F | 2.14 in. |
| February | 19.0 °F | 36.8 °F | 2.06 in. |
| March | 28.9 °F | 49.1 °F | 2.61 in. |
| April | 39.7 °F | 62.2 °F | 3.91 in. |
| May | 51.2 °F | 72.8 °F | 4.62 in. |
| June | 60.9 °F | 81.8 °F | 4.77 in. |
| July | 64.3 °F | 84.9 °F | 3.97 in. |
| August | 62.2 °F | 83.4 °F | 3.45 in. |
| September | 54.0 °F | 77.7 °F | 3.62 in. |
| October | 42.2 °F | 65.0 °F | 3.22 in. |
| November | 30.9 °F | 50.1 °F | 2.74 in. |
| December | 21.4 °F | 37.4 °F | 2.13 in. |
| Annual | 40.9 °F | 61.1 °F | 39.24 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 6a : -10°F to -5°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 |