Maddock, North Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 29.1 °F (low) to 50.5 °F (high). Annual precipitation averages 19.5 Inches. Maddock 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 Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -1.6 °F | 16.9 °F | 0.41 in. |
| February | 1.8 °F | 21.1 °F | 0.43 in. |
| March | 14.4 °F | 33.6 °F | 0.71 in. |
| April | 28.5 °F | 51.6 °F | 1.07 in. |
| May | 41.5 °F | 65.9 °F | 2.63 in. |
| June | 52.9 °F | 74.9 °F | 3.75 in. |
| July | 57.2 °F | 80.2 °F | 3.36 in. |
| August | 54.4 °F | 80.0 °F | 2.29 in. |
| September | 45.2 °F | 70.6 °F | 2.04 in. |
| October | 32.1 °F | 54.0 °F | 1.51 in. |
| November | 17.7 °F | 35.9 °F | 0.71 in. |
| December | 4.8 °F | 21.5 °F | 0.62 in. |
| Annual | 29.1 °F | 50.5 °F | 19.53 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| 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 |