Cedar Hill, Missouri has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.6 °C (low) to 19.2 °C (high). Annual precipitation averages 1112.5 Millimeters. Cedar Hill is located in USDA Plant Hardiness Zone 6b. 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 | -5.5 °C | 4.6 °C | 69.6 mm |
| February | -3.5 °C | 7.7 °C | 61.98 mm |
| March | 1.3 °C | 13.3 °C | 95 mm |
| April | 7.2 °C | 19.9 °C | 122.17 mm |
| May | 13.1 °C | 24.8 °C | 130.3 mm |
| June | 18 °C | 29.4 °C | 108.97 mm |
| July | 20.3 °C | 31.5 °C | 101.35 mm |
| August | 19.1 °C | 30.8 °C | 93.47 mm |
| September | 14.4 °C | 27.2 °C | 89.41 mm |
| October | 7.7 °C | 20.8 °C | 82.55 mm |
| November | 1.8 °C | 13.3 °C | 88.39 mm |
| December | -2.9 °C | 7 °C | 69.34 mm |
| Annual | 7.6 °C | 19.2 °C | 1112.53 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 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 | Cfa - Humid Subtropical Climate |