Marmarth, North Dakota has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 30.5 °F (low) to 56.8 °F (high). Annual precipitation averages 15.8 Inches. Marmarth 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 | 5.3 °F | 28.0 °F | 0.38 in. |
| February | 9.2 °F | 32.4 °F | 0.46 in. |
| March | 19.1 °F | 43.5 °F | 0.81 in. |
| April | 29.9 °F | 55.8 °F | 1.33 in. |
| May | 40.5 °F | 66.6 °F | 2.51 in. |
| June | 50.7 °F | 76.1 °F | 2.98 in. |
| July | 56.2 °F | 84.4 °F | 2.16 in. |
| August | 53.1 °F | 85.5 °F | 1.44 in. |
| September | 43.8 °F | 74.9 °F | 1.41 in. |
| October | 30.9 °F | 58.7 °F | 1.31 in. |
| November | 18.7 °F | 43.3 °F | 0.53 in. |
| December | 8.7 °F | 32.4 °F | 0.43 in. |
| Annual | 30.5 °F | 56.8 °F | 15.75 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 | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |