Leach, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 48.4 °F (low) to 70.2 °F (high). Annual precipitation averages 48.3 Inches. Leach is located in USDA Plant Hardiness Zone 7a. 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 | 27.1 °F | 48.0 °F | 2.63 in. |
| February | 30.6 °F | 52.5 °F | 2.44 in. |
| March | 38.9 °F | 61.4 °F | 3.99 in. |
| April | 47.2 °F | 70.6 °F | 4.81 in. |
| May | 56.6 °F | 77.4 °F | 6.12 in. |
| June | 65.3 °F | 85.4 °F | 4.96 in. |
| July | 69.4 °F | 90.8 °F | 3.98 in. |
| August | 67.9 °F | 90.4 °F | 3.69 in. |
| September | 60.2 °F | 83.2 °F | 4.57 in. |
| October | 48.6 °F | 72.3 °F | 4.41 in. |
| November | 38.8 °F | 60.4 °F | 3.63 in. |
| December | 30.1 °F | 50.3 °F | 3.05 in. |
| Annual | 48.4 °F | 70.2 °F | 48.28 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 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |