West Plains, Missouri has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.3 °C (low) to 19.9 °C (high). Annual precipitation averages 1221.2 Millimeters. West Plains is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.6 °C | 6.7 °C | 75.44 mm |
| February | -2.7 °C | 9.4 °C | 79.76 mm |
| March | 1.5 °C | 14.7 °C | 121.41 mm |
| April | 6.9 °C | 20.5 °C | 133.35 mm |
| May | 12.2 °C | 24.6 °C | 134.11 mm |
| June | 16.9 °C | 29 °C | 92.46 mm |
| July | 19.1 °C | 31.6 °C | 89.15 mm |
| August | 18.2 °C | 31.4 °C | 93.22 mm |
| September | 13.7 °C | 27.2 °C | 107.44 mm |
| October | 7.2 °C | 21 °C | 96.01 mm |
| November | 1.7 °C | 14.1 °C | 111 mm |
| December | -2.7 °C | 8.2 °C | 87.88 mm |
| Annual | 7.3 °C | 19.9 °C | 1221.23 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°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 |