Centreville, Illinois has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 47 °F (low) to 66.7 °F (high). Annual precipitation averages 45.2 Inches. Centreville 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 23.3 °F | 40.2 °F | 2.74 in. |
| February | 26.9 °F | 45.6 °F | 2.39 in. |
| March | 35.5 °F | 55.6 °F | 3.56 in. |
| April | 46.3 °F | 67.8 °F | 4.76 in. |
| May | 56.9 °F | 76.8 °F | 5.23 in. |
| June | 65.9 °F | 85.6 °F | 4.99 in. |
| July | 69.6 °F | 89.1 °F | 4.48 in. |
| August | 67.8 °F | 87.8 °F | 3.84 in. |
| September | 59.2 °F | 81.1 °F | 3.43 in. |
| October | 47.6 °F | 69.9 °F | 3.3 in. |
| November | 36.6 °F | 55.8 °F | 3.62 in. |
| December | 27.9 °F | 44.6 °F | 2.83 in. |
| Annual | 47 °F | 66.7 °F | 45.17 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| 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 | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |