Dalton, 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 652.8 Millimeters. Dalton is located in USDA Plant Hardiness Zone 4a. 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 | -17.2 °C | -7.3 °C | 17.53 mm |
| February | -15.2 °C | -4.5 °C | 16 mm |
| March | -7.9 °C | 2.6 °C | 27.18 mm |
| April | 0.1 °C | 11.6 °C | 50.8 mm |
| May | 7.6 °C | 18.9 °C | 82.55 mm |
| June | 13.6 °C | 24.4 °C | 108.71 mm |
| July | 16.2 °C | 26.8 °C | 94.23 mm |
| August | 14.9 °C | 25.9 °C | 79.5 mm |
| September | 10 °C | 21.8 °C | 70.61 mm |
| October | 2.6 °C | 12.9 °C | 62.99 mm |
| November | -5.3 °C | 3.4 °C | 23.37 mm |
| December | -12.8 °C | -4 °C | 19.3 mm |
| Annual | 0.6 °C | 11 °C | 652.77 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 4a : -34.4°C to -31.7°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 |