Waynoka, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.5 °C (low) to 22.2 °C (high). Annual precipitation averages 705.4 Millimeters. Waynoka 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 | -5.3 °C | 9.2 °C | 20.57 mm |
| February | -3.7 °C | 11.2 °C | 24.13 mm |
| March | 1.3 °C | 16.8 °C | 46.74 mm |
| April | 6.2 °C | 21.8 °C | 65.02 mm |
| May | 12.5 °C | 26.8 °C | 102.11 mm |
| June | 18.4 °C | 32.4 °C | 108.2 mm |
| July | 20.9 °C | 35.3 °C | 78.23 mm |
| August | 19.9 °C | 34.3 °C | 83.06 mm |
| September | 15.3 °C | 30.1 °C | 51.31 mm |
| October | 7.7 °C | 23.3 °C | 66.04 mm |
| November | 0.9 °C | 15.8 °C | 31.24 mm |
| December | -4.3 °C | 9.5 °C | 28.7 mm |
| Annual | 7.5 °C | 22.2 °C | 705.35 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |