Buffalo, North Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -0.7 °C (low) to 10.8 °C (high). Annual precipitation averages 580.9 Millimeters. Buffalo is located in USDA Plant Hardiness Zone 4a. 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 | -18.1 °C | -8.3 °C | 14.22 mm |
| February | -15.9 °C | -5.4 °C | 14.22 mm |
| March | -8.8 °C | 1.4 °C | 23.62 mm |
| April | -1 °C | 11.3 °C | 28.19 mm |
| May | 6.3 °C | 19.4 °C | 82.04 mm |
| June | 12.7 °C | 24.6 °C | 107.95 mm |
| July | 14.7 °C | 27.2 °C | 87.63 mm |
| August | 13.1 °C | 26.6 °C | 65.28 mm |
| September | 8.1 °C | 21.8 °C | 67.56 mm |
| October | 1 °C | 13.1 °C | 53.34 mm |
| November | -6.9 °C | 3.2 °C | 18.54 mm |
| December | -13.7 °C | -4.8 °C | 18.29 mm |
| Annual | -0.7 °C | 10.8 °C | 580.88 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 4a : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |