Knowles, Oklahoma has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 43.1 °F (low) to 70.7 °F (high). Annual precipitation averages 22.3 Inches. Knowles 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 | 20.8 °F | 48.0 °F | 0.67 in. |
| February | 23.4 °F | 51.3 °F | 0.69 in. |
| March | 32.1 °F | 61.2 °F | 1.58 in. |
| April | 40.4 °F | 69.9 °F | 2.04 in. |
| May | 51.6 °F | 79.5 °F | 2.69 in. |
| June | 62.1 °F | 88.8 °F | 3.46 in. |
| July | 66.8 °F | 93.6 °F | 2.66 in. |
| August | 65.1 °F | 92.0 °F | 3.05 in. |
| September | 56.9 °F | 84.5 °F | 1.57 in. |
| October | 43.7 °F | 72.0 °F | 1.99 in. |
| November | 31.2 °F | 59.4 °F | 0.86 in. |
| December | 22.6 °F | 48.1 °F | 1.04 in. |
| Annual | 43.1 °F | 70.7 °F | 22.3 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 | BSk - Cold Semi-Arid Climate |