Brownton, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 34.5 °F (low) to 54.2 °F (high). Annual precipitation averages 31.1 Inches. Brownton 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 | 4.5 °F | 21.8 °F | 0.76 in. |
| February | 7.8 °F | 26.4 °F | 0.84 in. |
| March | 20.8 °F | 38.8 °F | 1.55 in. |
| April | 33.9 °F | 55.2 °F | 2.78 in. |
| May | 46.6 °F | 68.3 °F | 4.05 in. |
| June | 57.6 °F | 78.0 °F | 4.96 in. |
| July | 61.5 °F | 82.0 °F | 3.64 in. |
| August | 58.6 °F | 79.5 °F | 4.3 in. |
| September | 50.1 °F | 72.9 °F | 3.28 in. |
| October | 37.2 °F | 58.3 °F | 2.26 in. |
| November | 24.2 °F | 41.4 °F | 1.55 in. |
| December | 11.6 °F | 27.3 °F | 1.16 in. |
| Annual | 34.5 °F | 54.2 °F | 31.13 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 |