Brandon, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.6 °C (low) to 11 °C (high). Annual precipitation averages 671.1 Millimeters. Brandon 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 | -16.9 °C | -7.2 °C | 17.78 mm |
| February | -14.9 °C | -4.4 °C | 16.51 mm |
| March | -7.9 °C | 2.4 °C | 29.21 mm |
| April | 0.1 °C | 11.3 °C | 54.36 mm |
| May | 7.6 °C | 18.9 °C | 80.26 mm |
| June | 13.5 °C | 24.2 °C | 110.74 mm |
| July | 16.1 °C | 26.8 °C | 101.85 mm |
| August | 14.6 °C | 25.8 °C | 85.34 mm |
| September | 9.7 °C | 21.4 °C | 65.28 mm |
| October | 2.4 °C | 12.8 °C | 65.02 mm |
| November | -5.2 °C | 3.4 °C | 24.64 mm |
| December | -12.4 °C | -3.9 °C | 20.07 mm |
| Annual | 0.6 °C | 11 °C | 671.06 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| 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 | Dfb - Humid Continental Mild Summer, Wet All Year |