Bell City, Missouri has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.6 °C (low) to 20.1 °C (high). Annual precipitation averages 1274.3 Millimeters. Bell City is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.4 °C | 6.1 °C | 91.44 mm |
| February | -1.7 °C | 8.9 °C | 93.22 mm |
| March | 2.9 °C | 14.4 °C | 117.86 mm |
| April | 8.2 °C | 20.6 °C | 139.95 mm |
| May | 13.9 °C | 25.6 °C | 136.14 mm |
| June | 18.7 °C | 30.2 °C | 93.73 mm |
| July | 20.6 °C | 31.8 °C | 110.49 mm |
| August | 19.4 °C | 31.3 °C | 80.52 mm |
| September | 14.8 °C | 28 °C | 84.33 mm |
| October | 8.2 °C | 21.8 °C | 99.57 mm |
| November | 2.6 °C | 14.1 °C | 117.09 mm |
| December | -1.6 °C | 7.9 °C | 109.98 mm |
| Annual | 8.6 °C | 20.1 °C | 1274.32 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |