Washita, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 48.6 °F (low) to 73 °F (high). Annual precipitation averages 31.2 Inches. Washita is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 26.5 °F | 51.1 °F | 1.07 in. |
| February | 29.9 °F | 54.8 °F | 1.3 in. |
| March | 38.3 °F | 64.0 °F | 2.3 in. |
| April | 46.6 °F | 72.3 °F | 3.2 in. |
| May | 57.5 °F | 80.8 °F | 4.77 in. |
| June | 66.8 °F | 89.4 °F | 3.96 in. |
| July | 70.6 °F | 94.5 °F | 2.62 in. |
| August | 69.4 °F | 94.0 °F | 3.06 in. |
| September | 61.5 °F | 86.2 °F | 2.99 in. |
| October | 49.1 °F | 74.9 °F | 2.85 in. |
| November | 37.7 °F | 62.5 °F | 1.61 in. |
| December | 28.7 °F | 51.9 °F | 1.51 in. |
| Annual | 48.6 °F | 73 °F | 31.24 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| 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 | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |