Buffalo, South Dakota has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 30.9 °F (low) to 56.6 °F (high). Annual precipitation averages 14.6 Inches. Buffalo is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 7.3 °F | 29.4 °F | 0.33 in. |
| February | 10.3 °F | 32.8 °F | 0.41 in. |
| March | 19.6 °F | 43.4 °F | 0.77 in. |
| April | 29.1 °F | 54.7 °F | 1.49 in. |
| May | 40.2 °F | 65.1 °F | 2.5 in. |
| June | 50.3 °F | 76.0 °F | 2.33 in. |
| July | 56.2 °F | 84.8 °F | 1.85 in. |
| August | 53.5 °F | 84.7 °F | 1.32 in. |
| September | 43.6 °F | 74.3 °F | 1.17 in. |
| October | 31.1 °F | 58.2 °F | 1.47 in. |
| November | 19.4 °F | 43.7 °F | 0.52 in. |
| December | 10.4 °F | 32.6 °F | 0.39 in. |
| Annual | 30.9 °F | 56.6 °F | 14.55 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |