Vermillion, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.1 °F (low) to 54.8 °F (high). Annual precipitation averages 33.7 Inches. Vermillion is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 6.6 °F | 23.3 °F | 0.95 in. |
| February | 9.9 °F | 28.1 °F | 0.93 in. |
| March | 22.2 °F | 40.5 °F | 1.75 in. |
| April | 35.5 °F | 55.7 °F | 2.95 in. |
| May | 48.0 °F | 68.2 °F | 4.26 in. |
| June | 58.5 °F | 77.9 °F | 5.15 in. |
| July | 62.6 °F | 82.0 °F | 4.21 in. |
| August | 60.0 °F | 79.9 °F | 4.54 in. |
| September | 51.7 °F | 72.7 °F | 3.39 in. |
| October | 38.7 °F | 58.5 °F | 2.62 in. |
| November | 25.9 °F | 42.1 °F | 1.64 in. |
| December | 13.5 °F | 28.6 °F | 1.27 in. |
| Annual | 36.1 °F | 54.8 °F | 33.66 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |