Buffalo, South Dakota has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from -0.6 °C (low) to 13.7 °C (high). Annual precipitation averages 369.6 Millimeters. 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 | -13.7 °C | -1.4 °C | 8.38 mm |
| February | -12.1 °C | 0.4 °C | 10.41 mm |
| March | -6.9 °C | 6.3 °C | 19.56 mm |
| April | -1.6 °C | 12.6 °C | 37.85 mm |
| May | 4.6 °C | 18.4 °C | 63.5 mm |
| June | 10.2 °C | 24.4 °C | 59.18 mm |
| July | 13.4 °C | 29.3 °C | 46.99 mm |
| August | 11.9 °C | 29.3 °C | 33.53 mm |
| September | 6.4 °C | 23.5 °C | 29.72 mm |
| October | -0.5 °C | 14.6 °C | 37.34 mm |
| November | -7 °C | 6.5 °C | 13.21 mm |
| December | -12 °C | 0.3 °C | 9.91 mm |
| Annual | -0.6 °C | 13.7 °C | 369.58 mm |
| 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 : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |