Buffalo Lake, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.4 °C (low) to 12.3 °C (high). Annual precipitation averages 756.4 Millimeters. 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 | -15.4 °C | -5.7 °C | 16 mm |
| February | -13.5 °C | -3.2 °C | 21.08 mm |
| March | -6.4 °C | 3.7 °C | 39.37 mm |
| April | 1 °C | 12.8 °C | 68.83 mm |
| May | 8.2 °C | 20.2 °C | 99.31 mm |
| June | 14.3 °C | 25.7 °C | 123.19 mm |
| July | 16.3 °C | 27.8 °C | 89.15 mm |
| August | 14.8 °C | 26.5 °C | 101.85 mm |
| September | 9.9 °C | 22.7 °C | 81.03 mm |
| October | 2.8 °C | 14.6 °C | 56.64 mm |
| November | -4.4 °C | 5.1 °C | 33.27 mm |
| December | -11.4 °C | -2.7 °C | 26.67 mm |
| Annual | 1.4 °C | 12.3 °C | 756.39 mm |
| 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 : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |