Mountain Grove, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 45.6 °F (low) to 66.1 °F (high). Annual precipitation averages 45.9 Inches. 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 | 23.1 °F | 42.2 °F | 2.73 in. |
| February | 26.7 °F | 46.9 °F | 2.85 in. |
| March | 35.0 °F | 56.2 °F | 4.3 in. |
| April | 44.8 °F | 66.3 °F | 4.97 in. |
| May | 54.3 °F | 74.7 °F | 5.36 in. |
| June | 63.1 °F | 82.8 °F | 3.88 in. |
| July | 67.0 °F | 87.1 °F | 4.38 in. |
| August | 65.3 °F | 86.9 °F | 3.3 in. |
| September | 57.6 °F | 79.9 °F | 3.94 in. |
| October | 46.4 °F | 68.5 °F | 3.36 in. |
| November | 36.2 °F | 56.2 °F | 3.98 in. |
| December | 27.1 °F | 45.0 °F | 2.87 in. |
| Annual | 45.6 °F | 66.1 °F | 45.92 in. |
| 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 : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |