Buffalo, Wyoming has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.3 °C (low) to 14.5 °C (high). Annual precipitation averages 349 Millimeters. Buffalo is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -10.3 °C | 2.8 °C | 8.13 mm |
| February | -9.5 °C | 3.4 °C | 12.95 mm |
| March | -5.1 °C | 8.6 °C | 19.56 mm |
| April | -0.9 °C | 12.3 °C | 38.86 mm |
| May | 4.3 °C | 17.3 °C | 72.64 mm |
| June | 9.2 °C | 23.6 °C | 54.86 mm |
| July | 13.1 °C | 29.1 °C | 28.45 mm |
| August | 11.9 °C | 28.5 °C | 20.07 mm |
| September | 6.8 °C | 22.8 °C | 37.34 mm |
| October | 0.3 °C | 14.7 °C | 33.53 mm |
| November | -5.8 °C | 8 °C | 13.72 mm |
| December | -10.2 °C | 2.9 °C | 8.89 mm |
| Annual | 0.3 °C | 14.5 °C | 349 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |