Mountain Grove, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7.5 °C (low) to 18.9 °C (high). Annual precipitation averages 1166.4 Millimeters. Mountain Grove 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 | -4.9 °C | 5.7 °C | 69.34 mm |
| February | -2.9 °C | 8.3 °C | 72.39 mm |
| March | 1.7 °C | 13.4 °C | 109.22 mm |
| April | 7.1 °C | 19.1 °C | 126.24 mm |
| May | 12.4 °C | 23.7 °C | 136.14 mm |
| June | 17.3 °C | 28.2 °C | 98.55 mm |
| July | 19.4 °C | 30.6 °C | 111.25 mm |
| August | 18.5 °C | 30.5 °C | 83.82 mm |
| September | 14.2 °C | 26.6 °C | 100.08 mm |
| October | 8 °C | 20.3 °C | 85.34 mm |
| November | 2.3 °C | 13.4 °C | 101.09 mm |
| December | -2.7 °C | 7.2 °C | 72.9 mm |
| Annual | 7.5 °C | 18.9 °C | 1166.36 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |