Devils Lake, North Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 29.7 °F (low) to 48.9 °F (high). Annual precipitation averages 19.8 Inches. Devils Lake 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 | -1.9 °F | 15.2 °F | 0.45 in. |
| February | 1.0 °F | 19.8 °F | 0.44 in. |
| March | 13.9 °F | 31.7 °F | 0.72 in. |
| April | 29.1 °F | 49.5 °F | 1.05 in. |
| May | 42.5 °F | 64.0 °F | 2.51 in. |
| June | 53.9 °F | 73.2 °F | 4.03 in. |
| July | 58.6 °F | 78.5 °F | 3.48 in. |
| August | 56.0 °F | 78.0 °F | 2.54 in. |
| September | 46.3 °F | 68.6 °F | 1.95 in. |
| October | 33.3 °F | 52.5 °F | 1.23 in. |
| November | 18.7 °F | 34.5 °F | 0.75 in. |
| December | 5.3 °F | 20.7 °F | 0.62 in. |
| Annual | 29.7 °F | 48.9 °F | 19.77 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 | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |