New Salem, North Dakota has a Humid Continental Mild Summer With Dry Winters climate (Köppen classification: Dwb). Average annual temperatures range from 30.3 °F (low) to 53.9 °F (high). Annual precipitation averages 18.6 Inches. New Salem is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.3 °F | 22.7 °F | 0.37 in. |
| February | 6.9 °F | 27.1 °F | 0.43 in. |
| March | 17.9 °F | 39.6 °F | 0.68 in. |
| April | 29.0 °F | 54.1 °F | 1.39 in. |
| May | 40.9 °F | 66.3 °F | 2.82 in. |
| June | 51.1 °F | 75.5 °F | 3.5 in. |
| July | 56.6 °F | 82.8 °F | 2.97 in. |
| August | 54.2 °F | 82.4 °F | 2.2 in. |
| September | 44.9 °F | 72.5 °F | 1.78 in. |
| October | 31.6 °F | 56.1 °F | 1.38 in. |
| November | 18.6 °F | 39.8 °F | 0.59 in. |
| December | 8.1 °F | 27.3 °F | 0.51 in. |
| Annual | 30.3 °F | 53.9 °F | 18.62 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 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 | Abnormally Dry |
| Köppen Climate Classification | Dwb - Humid Continental Mild Summer With Dry Winters |