Dennis Acres, Missouri has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8 °C (low) to 20.3 °C (high). Annual precipitation averages 1167.6 Millimeters. Dennis Acres 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 | -4.4 °C | 7.1 °C | 52.58 mm |
| February | -2.6 °C | 9.8 °C | 54.61 mm |
| March | 2.2 °C | 15.1 °C | 88.14 mm |
| April | 7.3 °C | 20.3 °C | 130.05 mm |
| May | 12.9 °C | 24.6 °C | 173.48 mm |
| June | 18.1 °C | 29.3 °C | 125.22 mm |
| July | 20.4 °C | 32 °C | 89.92 mm |
| August | 19.3 °C | 31.9 °C | 91.44 mm |
| September | 14.6 °C | 27.8 °C | 107.95 mm |
| October | 8.1 °C | 21.7 °C | 101.09 mm |
| November | 2.2 °C | 14.7 °C | 87.12 mm |
| December | -2.6 °C | 8.9 °C | 66.04 mm |
| Annual | 8 °C | 20.3 °C | 1167.64 mm |
| 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 : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |