Buffalo Lake, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 34.4 °F (low) to 54.1 °F (high). Annual precipitation averages 29.8 Inches. Buffalo Lake is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 4.3 °F | 21.7 °F | 0.63 in. |
| February | 7.7 °F | 26.3 °F | 0.83 in. |
| March | 20.5 °F | 38.6 °F | 1.55 in. |
| April | 33.8 °F | 55.0 °F | 2.71 in. |
| May | 46.7 °F | 68.4 °F | 3.91 in. |
| June | 57.7 °F | 78.2 °F | 4.85 in. |
| July | 61.4 °F | 82.1 °F | 3.51 in. |
| August | 58.7 °F | 79.7 °F | 4.01 in. |
| September | 49.9 °F | 72.9 °F | 3.19 in. |
| October | 37.0 °F | 58.2 °F | 2.23 in. |
| November | 24.0 °F | 41.2 °F | 1.31 in. |
| December | 11.5 °F | 27.2 °F | 1.05 in. |
| Annual | 34.4 °F | 54.1 °F | 29.78 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 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 |