Hardesty, Oklahoma has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 41.8 °F (low) to 71.2 °F (high). Annual precipitation averages 19.1 Inches. Hardesty is located in USDA Plant Hardiness Zone 6b. 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 | 20.2 °F | 48.8 °F | 0.48 in. |
| February | 22.9 °F | 52.4 °F | 0.41 in. |
| March | 30.8 °F | 61.6 °F | 1.21 in. |
| April | 39.3 °F | 69.9 °F | 1.64 in. |
| May | 50.3 °F | 79.8 °F | 2.35 in. |
| June | 60.8 °F | 89.7 °F | 2.79 in. |
| July | 65.4 °F | 94.1 °F | 2.58 in. |
| August | 63.7 °F | 91.9 °F | 3.1 in. |
| September | 55.5 °F | 85.4 °F | 1.38 in. |
| October | 41.9 °F | 72.7 °F | 1.77 in. |
| November | 29.6 °F | 59.9 °F | 0.65 in. |
| December | 21.4 °F | 48.4 °F | 0.72 in. |
| Annual | 41.8 °F | 71.2 °F | 19.08 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |