Quanah, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.4 °C (low) to 24.3 °C (high). Annual precipitation averages 669.6 Millimeters. Quanah is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.9 °C | 12.3 °C | 24.89 mm |
| February | -1 °C | 14.3 °C | 25.91 mm |
| March | 3.8 °C | 19.4 °C | 42.93 mm |
| April | 8.2 °C | 24.2 °C | 60.96 mm |
| May | 14.4 °C | 28.9 °C | 92.2 mm |
| June | 19.7 °C | 33.6 °C | 88.65 mm |
| July | 21.8 °C | 35.9 °C | 59.69 mm |
| August | 21.1 °C | 35.5 °C | 70.1 mm |
| September | 16.7 °C | 30.9 °C | 73.41 mm |
| October | 9.8 °C | 25.1 °C | 60.71 mm |
| November | 3.1 °C | 18.2 °C | 41.15 mm |
| December | -1.9 °C | 12.7 °C | 28.96 mm |
| Annual | 9.4 °C | 24.3 °C | 669.56 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |