Lignite, North Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 27.8 °F (low) to 49.7 °F (high). Annual precipitation averages 17.6 Inches. Lignite is located in USDA Plant Hardiness Zone 3b. 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 | -1.6 °F | 17.0 °F | 0.59 in. |
| February | 2.2 °F | 21.6 °F | 0.51 in. |
| March | 14.1 °F | 33.4 °F | 0.71 in. |
| April | 27.4 °F | 51.3 °F | 1.01 in. |
| May | 39.6 °F | 64.3 °F | 2.36 in. |
| June | 50.6 °F | 72.8 °F | 3.8 in. |
| July | 54.6 °F | 78.7 °F | 2.76 in. |
| August | 52.2 °F | 79.3 °F | 1.71 in. |
| September | 42.8 °F | 69.1 °F | 1.54 in. |
| October | 30.2 °F | 52.7 °F | 1.31 in. |
| November | 16.5 °F | 34.8 °F | 0.68 in. |
| December | 4.4 °F | 21.8 °F | 0.63 in. |
| Annual | 27.8 °F | 49.7 °F | 17.61 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 3b : -35°F to -30°F |
| Plant Hardiness Zone - 2012 | Zone 3b : -35°F to -30°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |