Lignite, North Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -2.4 °C (low) to 9.9 °C (high). Annual precipitation averages 447.3 Millimeters. 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 | -18.7 °C | -8.3 °C | 14.99 mm |
| February | -16.6 °C | -5.8 °C | 12.95 mm |
| March | -9.9 °C | 0.8 °C | 18.03 mm |
| April | -2.6 °C | 10.7 °C | 25.65 mm |
| May | 4.2 °C | 17.9 °C | 59.94 mm |
| June | 10.3 °C | 22.7 °C | 96.52 mm |
| July | 12.6 °C | 25.9 °C | 70.1 mm |
| August | 11.2 °C | 26.3 °C | 43.43 mm |
| September | 6 °C | 20.6 °C | 39.12 mm |
| October | -1 °C | 11.5 °C | 33.27 mm |
| November | -8.6 °C | 1.6 °C | 17.27 mm |
| December | -15.3 °C | -5.7 °C | 16 mm |
| Annual | -2.4 °C | 9.9 °C | 447.27 mm |
| 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 : -37.2°C to -34.4°C |
| Plant Hardiness Zone - 2012 | Zone 3b : -37.2°C to -34.4°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |