Roscoe, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7.4 °C (low) to 19.6 °C (high). Annual precipitation averages 1123.7 Millimeters. Roscoe 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 | -5.8 °C | 5.6 °C | 48.77 mm |
| February | -3.7 °C | 8.5 °C | 52.32 mm |
| March | 1.3 °C | 14.2 °C | 75.18 mm |
| April | 6.7 °C | 20 °C | 121.41 mm |
| May | 12.7 °C | 24.6 °C | 148.59 mm |
| June | 17.9 °C | 29.3 °C | 129.03 mm |
| July | 20.2 °C | 32 °C | 108.71 mm |
| August | 19.1 °C | 31.6 °C | 97.54 mm |
| September | 14.3 °C | 27.2 °C | 107.95 mm |
| October | 7.6 °C | 21.1 °C | 90.42 mm |
| November | 1.7 °C | 13.7 °C | 82.8 mm |
| December | -3.2 °C | 7.6 °C | 60.96 mm |
| Annual | 7.4 °C | 19.6 °C | 1123.68 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 | Dfa - Humid Continental Hot Summers With Year Around Precipitation |