Byron, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.8 °C (low) to 22.1 °C (high). Annual precipitation averages 800.6 Millimeters. Byron 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 Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.2 °C | 8.7 °C | 23.62 mm |
| February | -3.3 °C | 10.9 °C | 28.96 mm |
| March | 1.7 °C | 16.6 °C | 56.64 mm |
| April | 6.4 °C | 21.7 °C | 74.17 mm |
| May | 12.9 °C | 26.9 °C | 109.22 mm |
| June | 18.7 °C | 32.6 °C | 115.82 mm |
| July | 21.2 °C | 35.4 °C | 87.38 mm |
| August | 20.2 °C | 34.3 °C | 97.03 mm |
| September | 15.7 °C | 30.2 °C | 61.72 mm |
| October | 8.3 °C | 23.2 °C | 74.68 mm |
| November | 1.4 °C | 15.7 °C | 37.34 mm |
| December | -3.9 °C | 9.2 °C | 34.04 mm |
| Annual | 7.8 °C | 22.1 °C | 800.62 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 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 |