Buffalo, Wyoming has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 32.6 °F (low) to 58.1 °F (high). Annual precipitation averages 13.7 Inches. 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 | 13.4 °F | 37.1 °F | 0.32 in. |
| February | 14.9 °F | 38.2 °F | 0.51 in. |
| March | 22.9 °F | 47.5 °F | 0.77 in. |
| April | 30.3 °F | 54.2 °F | 1.53 in. |
| May | 39.8 °F | 63.2 °F | 2.86 in. |
| June | 48.5 °F | 74.5 °F | 2.16 in. |
| July | 55.5 °F | 84.4 °F | 1.12 in. |
| August | 53.5 °F | 83.3 °F | 0.79 in. |
| September | 44.2 °F | 73.0 °F | 1.47 in. |
| October | 32.5 °F | 58.4 °F | 1.32 in. |
| November | 21.6 °F | 46.4 °F | 0.54 in. |
| December | 13.6 °F | 37.2 °F | 0.35 in. |
| Annual | 32.6 °F | 58.1 °F | 13.74 in. |
| 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 : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |