Montrose, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.7 °C (low) to 12.1 °C (high). Annual precipitation averages 796 Millimeters. Montrose 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 | -15.2 °C | -5.6 °C | 19.56 mm |
| February | -13.4 °C | -2.9 °C | 21.34 mm |
| March | -6.2 °C | 4.1 °C | 37.08 mm |
| April | 1.2 °C | 12.5 °C | 72.39 mm |
| May | 8.4 °C | 19.7 °C | 106.43 mm |
| June | 14.4 °C | 25.1 °C | 121.16 mm |
| July | 16.7 °C | 27.7 °C | 98.04 mm |
| August | 15.2 °C | 26.3 °C | 108.46 mm |
| September | 10.6 °C | 22.2 °C | 83.82 mm |
| October | 3.3 °C | 14.1 °C | 62.99 mm |
| November | -3.8 °C | 5.1 °C | 36.83 mm |
| December | -11.1 °C | -2.7 °C | 27.94 mm |
| Annual | 1.7 °C | 12.1 °C | 796.04 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 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 |