Milton, North Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 27 °F (low) to 47.5 °F (high). Annual precipitation averages 21.8 Inches. Milton is located in USDA Plant Hardiness Zone 3b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.7 °F | 13.0 °F | 0.57 in. |
| February | -2.0 °F | 17.5 °F | 0.53 in. |
| March | 11.7 °F | 29.9 °F | 0.8 in. |
| April | 27.5 °F | 48.2 °F | 0.93 in. |
| May | 40.2 °F | 63.3 °F | 3.24 in. |
| June | 51.5 °F | 72.5 °F | 4.05 in. |
| July | 55.2 °F | 77.1 °F | 3.33 in. |
| August | 52.7 °F | 77.3 °F | 2.7 in. |
| September | 43.4 °F | 68.0 °F | 2.3 in. |
| October | 30.5 °F | 51.7 °F | 1.61 in. |
| November | 15.9 °F | 33.2 °F | 0.91 in. |
| December | 2.4 °F | 18.6 °F | 0.78 in. |
| Annual | 27 °F | 47.5 °F | 21.75 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 3b : -35°F to -30°F |
| Plant Hardiness Zone - 2012 | Zone 3b : -35°F to -30°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |