Ash Grove, Missouri has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.3 °C (low) to 19.7 °C (high). Annual precipitation averages 1127.3 Millimeters. Ash 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 | -5.2 °C | 6 °C | 57.66 mm |
| February | -3.2 °C | 8.8 °C | 53.85 mm |
| March | 1.5 °C | 14.3 °C | 90.93 mm |
| April | 6.6 °C | 19.9 °C | 118.36 mm |
| May | 12.3 °C | 24.4 °C | 143.76 mm |
| June | 17.4 °C | 29.3 °C | 117.35 mm |
| July | 19.7 °C | 31.8 °C | 99.06 mm |
| August | 18.6 °C | 31.6 °C | 87.38 mm |
| September | 14.1 °C | 27.6 °C | 115.82 mm |
| October | 7.4 °C | 21.1 °C | 87.63 mm |
| November | 1.7 °C | 13.8 °C | 88.39 mm |
| December | -3.2 °C | 7.9 °C | 67.06 mm |
| Annual | 7.3 °C | 19.7 °C | 1127.25 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 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |