New Rockford, North Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 30 °F (low) to 50.7 °F (high). Annual precipitation averages 19.5 Inches. New Rockford is located in USDA Plant Hardiness Zone 4a. 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 | -0.5 °F | 17.3 °F | 0.45 in. |
| February | 3.0 °F | 21.9 °F | 0.42 in. |
| March | 15.3 °F | 34.1 °F | 0.7 in. |
| April | 29.0 °F | 51.5 °F | 1.07 in. |
| May | 42.3 °F | 65.8 °F | 2.46 in. |
| June | 53.3 °F | 74.9 °F | 3.78 in. |
| July | 57.9 °F | 80.1 °F | 3.36 in. |
| August | 55.2 °F | 79.7 °F | 2.53 in. |
| September | 46.0 °F | 70.5 °F | 1.89 in. |
| October | 33.0 °F | 54.3 °F | 1.56 in. |
| November | 18.8 °F | 36.3 °F | 0.68 in. |
| December | 6.2 °F | 22.4 °F | 0.64 in. |
| Annual | 30 °F | 50.7 °F | 19.54 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 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 |