Hydro, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 47.9 °F (low) to 71.9 °F (high). Annual precipitation averages 30.9 Inches. Hydro is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 26.1 °F | 49.4 °F | 1.02 in. |
| February | 29.1 °F | 52.9 °F | 1.28 in. |
| March | 37.3 °F | 62.4 °F | 2.35 in. |
| April | 45.6 °F | 71.0 °F | 2.98 in. |
| May | 56.5 °F | 80.0 °F | 4.48 in. |
| June | 66.3 °F | 89.2 °F | 4.06 in. |
| July | 70.4 °F | 94.5 °F | 2.4 in. |
| August | 68.8 °F | 93.5 °F | 3.63 in. |
| September | 61.1 °F | 85.4 °F | 2.75 in. |
| October | 48.6 °F | 73.5 °F | 2.97 in. |
| November | 37.0 °F | 61.0 °F | 1.56 in. |
| December | 27.8 °F | 50.2 °F | 1.41 in. |
| Annual | 47.9 °F | 71.9 °F | 30.89 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Exceptional Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |