Dumont, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.4 °C (low) to 11.7 °C (high). Annual precipitation averages 651.5 Millimeters. Dumont 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 | -16.7 °C | -6.6 °C | 17.53 mm |
| February | -14.9 °C | -4.3 °C | 16.76 mm |
| March | -7.4 °C | 2.9 °C | 28.19 mm |
| April | 0.1 °C | 12.1 °C | 61.47 mm |
| May | 7.5 °C | 19.8 °C | 77.72 mm |
| June | 13.7 °C | 25.1 °C | 101.6 mm |
| July | 15.8 °C | 27.5 °C | 99.82 mm |
| August | 14.1 °C | 26.4 °C | 72.39 mm |
| September | 9.1 °C | 22.4 °C | 67.82 mm |
| October | 2.1 °C | 14 °C | 62.23 mm |
| November | -5.5 °C | 4.6 °C | 26.67 mm |
| December | -12.7 °C | -3.5 °C | 19.3 mm |
| Annual | 0.4 °C | 11.7 °C | 651.5 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 | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |