Quinlan, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 45.2 °F (low) to 71.7 °F (high). Annual precipitation averages 27 Inches. Quinlan 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 22.4 °F | 48.8 °F | 0.82 in. |
| February | 25.2 °F | 52.2 °F | 1.0 in. |
| March | 34.2 °F | 62.1 °F | 1.9 in. |
| April | 43.0 °F | 71.1 °F | 2.52 in. |
| May | 54.1 °F | 79.9 °F | 3.71 in. |
| June | 64.6 °F | 89.5 °F | 3.85 in. |
| July | 69.1 °F | 94.8 °F | 2.81 in. |
| August | 67.2 °F | 93.4 °F | 3.11 in. |
| September | 58.9 °F | 85.6 °F | 2.2 in. |
| October | 45.6 °F | 73.3 °F | 2.64 in. |
| November | 33.4 °F | 60.5 °F | 1.27 in. |
| December | 24.1 °F | 49.3 °F | 1.19 in. |
| Annual | 45.2 °F | 71.7 °F | 27.02 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |