Buffalo, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 6.8 °C (low) to 22.6 °C (high). Annual precipitation averages 585.2 Millimeters. Buffalo is located in USDA Plant Hardiness Zone 6b. 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 | -6.1 °C | 9.6 °C | 15.75 mm |
| February | -4.5 °C | 11.4 °C | 20.07 mm |
| March | 0.5 °C | 17.2 °C | 40.39 mm |
| April | 5.6 °C | 22.1 °C | 53.34 mm |
| May | 11.8 °C | 27.4 °C | 71.88 mm |
| June | 17.8 °C | 32.8 °C | 95.25 mm |
| July | 20.4 °C | 35.8 °C | 64.52 mm |
| August | 19.3 °C | 34.7 °C | 78.74 mm |
| September | 14.6 °C | 30.6 °C | 42.67 mm |
| October | 6.9 °C | 23.4 °C | 55.63 mm |
| November | -0.1 °C | 16.3 °C | 22.86 mm |
| December | -5.2 °C | 9.8 °C | 24.13 mm |
| Annual | 6.8 °C | 22.6 °C | 585.23 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 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |