Dalton, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 33 °F (low) to 51.9 °F (high). Annual precipitation averages 25.7 Inches. 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 | 1.1 °F | 18.8 °F | 0.69 in. |
| February | 4.7 °F | 23.9 °F | 0.63 in. |
| March | 17.7 °F | 36.7 °F | 1.07 in. |
| April | 32.2 °F | 52.8 °F | 2.0 in. |
| May | 45.7 °F | 66.1 °F | 3.25 in. |
| June | 56.4 °F | 75.9 °F | 4.28 in. |
| July | 61.1 °F | 80.3 °F | 3.71 in. |
| August | 58.9 °F | 78.7 °F | 3.13 in. |
| September | 50.0 °F | 71.3 °F | 2.78 in. |
| October | 36.6 °F | 55.3 °F | 2.48 in. |
| November | 22.5 °F | 38.2 °F | 0.92 in. |
| December | 9.0 °F | 24.8 °F | 0.76 in. |
| Annual | 33 °F | 51.9 °F | 25.7 in. |
| 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 : -30°F to -25°F |
| Plant Hardiness Zone - 2012 | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |