Belfonte, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.7 °C (low) to 21.9 °C (high). Annual precipitation averages 1244.3 Millimeters. Belfonte 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 Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.1 °C | 9.7 °C | 75.18 mm |
| February | -0.2 °C | 12.2 °C | 67.56 mm |
| March | 4.4 °C | 17 °C | 109.73 mm |
| April | 8.9 °C | 21.9 °C | 123.7 mm |
| May | 14.3 °C | 25.7 °C | 149.35 mm |
| June | 19.1 °C | 30.4 °C | 119.89 mm |
| July | 21.2 °C | 33.2 °C | 94.23 mm |
| August | 20.6 °C | 33.2 °C | 96.01 mm |
| September | 16.5 °C | 29.3 °C | 109.22 mm |
| October | 9.9 °C | 23.1 °C | 108.71 mm |
| November | 4.2 °C | 16.7 °C | 103.89 mm |
| December | -0.5 °C | 10.9 °C | 86.87 mm |
| Annual | 9.7 °C | 21.9 °C | 1244.34 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 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |