Watonga, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 47.5 °F (low) to 71.4 °F (high). Annual precipitation averages 31.5 Inches. Watonga 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 | 25.5 °F | 48.7 °F | 1.01 in. |
| February | 28.2 °F | 52.3 °F | 1.3 in. |
| March | 36.7 °F | 61.8 °F | 2.35 in. |
| April | 45.1 °F | 70.6 °F | 2.98 in. |
| May | 56.1 °F | 79.4 °F | 4.17 in. |
| June | 66.1 °F | 89.0 °F | 4.05 in. |
| July | 70.5 °F | 94.4 °F | 2.77 in. |
| August | 68.9 °F | 93.1 °F | 3.8 in. |
| September | 60.9 °F | 85.1 °F | 2.84 in. |
| October | 48.5 °F | 73.0 °F | 2.98 in. |
| November | 36.6 °F | 60.3 °F | 1.79 in. |
| December | 27.4 °F | 49.6 °F | 1.46 in. |
| Annual | 47.5 °F | 71.4 °F | 31.5 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 |