Healdton, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.4 °C (low) to 23.6 °C (high). Annual precipitation averages 911.9 Millimeters. Healdton is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -1.4 °C | 11.8 °C | 42.67 mm |
| February | 0.6 °C | 13.9 °C | 51.05 mm |
| March | 5.2 °C | 18.8 °C | 69.85 mm |
| April | 9.5 °C | 23.2 °C | 84.33 mm |
| May | 15.1 °C | 27.2 °C | 132.08 mm |
| June | 20.1 °C | 31.9 °C | 101.85 mm |
| July | 22 °C | 34.9 °C | 66.29 mm |
| August | 21.6 °C | 35.2 °C | 68.58 mm |
| September | 17.3 °C | 30.7 °C | 95.25 mm |
| October | 10.7 °C | 24.7 °C | 90.42 mm |
| November | 4.6 °C | 18.2 °C | 52.58 mm |
| December | -0.6 °C | 12.6 °C | 56.9 mm |
| Annual | 10.4 °C | 23.6 °C | 911.85 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |