Buffalo, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35 °F (low) to 53.8 °F (high). Annual precipitation averages 31.2 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 Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 4.9 °F | 22.0 °F | 0.75 in. |
| February | 8.0 °F | 26.7 °F | 0.84 in. |
| March | 20.7 °F | 39.4 °F | 1.49 in. |
| April | 34.1 °F | 54.5 °F | 2.84 in. |
| May | 47.0 °F | 67.5 °F | 4.1 in. |
| June | 57.7 °F | 77.1 °F | 4.66 in. |
| July | 62.1 °F | 81.6 °F | 3.86 in. |
| August | 59.3 °F | 79.2 °F | 4.24 in. |
| September | 50.9 °F | 71.8 °F | 3.27 in. |
| October | 38.0 °F | 57.1 °F | 2.6 in. |
| November | 25.2 °F | 41.1 °F | 1.46 in. |
| December | 12.2 °F | 27.2 °F | 1.11 in. |
| Annual | 35 °F | 53.8 °F | 31.22 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 4b : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |