West City, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 46 °F (low) to 66.3 °F (high). Annual precipitation averages 46.1 Inches. West City is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 23.6 °F | 40.5 °F | 3.19 in. |
| February | 26.7 °F | 45.5 °F | 2.88 in. |
| March | 35.4 °F | 55.5 °F | 4.0 in. |
| April | 45.5 °F | 67.4 °F | 5.27 in. |
| May | 55.9 °F | 76.3 °F | 5.19 in. |
| June | 64.4 °F | 84.9 °F | 4.71 in. |
| July | 68.0 °F | 87.8 °F | 3.88 in. |
| August | 65.6 °F | 87.0 °F | 2.98 in. |
| September | 57.6 °F | 80.9 °F | 3.11 in. |
| October | 45.9 °F | 69.4 °F | 3.39 in. |
| November | 35.8 °F | 55.8 °F | 4.13 in. |
| December | 27.7 °F | 44.6 °F | 3.32 in. |
| Annual | 46 °F | 66.3 °F | 46.05 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |