New Salem, North Dakota has a Humid Continental Mild Summer With Dry Winters climate (Köppen classification: Dwb). Average annual temperatures range from -1 °C (low) to 12.1 °C (high). Annual precipitation averages 473 Millimeters. 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 | -15.9 °C | -5.2 °C | 9.4 mm |
| February | -13.9 °C | -2.7 °C | 10.92 mm |
| March | -7.8 °C | 4.2 °C | 17.27 mm |
| April | -1.7 °C | 12.3 °C | 35.31 mm |
| May | 4.9 °C | 19.1 °C | 71.63 mm |
| June | 10.6 °C | 24.2 °C | 88.9 mm |
| July | 13.7 °C | 28.2 °C | 75.44 mm |
| August | 12.3 °C | 28 °C | 55.88 mm |
| September | 7.2 °C | 22.5 °C | 45.21 mm |
| October | -0.2 °C | 13.4 °C | 35.05 mm |
| November | -7.4 °C | 4.3 °C | 14.99 mm |
| December | -13.3 °C | -2.6 °C | 12.95 mm |
| Annual | -1 °C | 12.1 °C | 472.95 mm |
| 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 : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dwb - Humid Continental Mild Summer With Dry Winters |