West Peoria, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.6 °F (low) to 61.7 °F (high). Annual precipitation averages 39 Inches. West Peoria 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 | 16.4 °F | 32.9 °F | 2.12 in. |
| February | 19.7 °F | 37.5 °F | 2.05 in. |
| March | 29.7 °F | 49.9 °F | 2.6 in. |
| April | 40.6 °F | 62.7 °F | 3.89 in. |
| May | 52.2 °F | 73.3 °F | 4.74 in. |
| June | 61.7 °F | 82.3 °F | 4.72 in. |
| July | 65.1 °F | 85.6 °F | 3.95 in. |
| August | 63.0 °F | 84.0 °F | 3.41 in. |
| September | 54.8 °F | 78.3 °F | 3.51 in. |
| October | 42.7 °F | 65.5 °F | 3.2 in. |
| November | 31.6 °F | 50.7 °F | 2.72 in. |
| December | 22.1 °F | 38.2 °F | 2.11 in. |
| Annual | 41.6 °F | 61.7 °F | 39.02 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 | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |