Bonne Terre, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7.2 °C (low) to 19.1 °C (high). Annual precipitation averages 1132.1 Millimeters. Bonne Terre is located in USDA Plant Hardiness Zone 6b. 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 | -5.2 °C | 5.3 °C | 67.31 mm |
| February | -3.4 °C | 8.2 °C | 66.29 mm |
| March | 1.1 °C | 13.6 °C | 97.28 mm |
| April | 6.8 °C | 19.8 °C | 132.33 mm |
| May | 12.4 °C | 24.3 °C | 134.87 mm |
| June | 17.1 °C | 28.8 °C | 102.36 mm |
| July | 19.3 °C | 30.9 °C | 99.57 mm |
| August | 18.3 °C | 30.6 °C | 89.92 mm |
| September | 13.8 °C | 26.8 °C | 85.85 mm |
| October | 7.4 °C | 20.7 °C | 83.82 mm |
| November | 1.7 °C | 13.3 °C | 96.77 mm |
| December | -2.9 °C | 7.1 °C | 75.69 mm |
| Annual | 7.2 °C | 19.1 °C | 1132.06 mm |
| 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 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |