Cavalier, North Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 28.8 °F (low) to 48.7 °F (high). Annual precipitation averages 21 Inches. Cavalier is located in USDA Plant Hardiness Zone 4a. 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 | -3.1 °F | 13.8 °F | 0.49 in. |
| February | -0.0 °F | 18.6 °F | 0.46 in. |
| March | 13.9 °F | 31.3 °F | 0.79 in. |
| April | 28.7 °F | 49.8 °F | 1.03 in. |
| May | 41.4 °F | 64.3 °F | 3.11 in. |
| June | 53.1 °F | 74.0 °F | 3.84 in. |
| July | 57.2 °F | 78.5 °F | 3.25 in. |
| August | 53.9 °F | 78.1 °F | 2.57 in. |
| September | 45.0 °F | 68.9 °F | 2.26 in. |
| October | 33.0 °F | 52.7 °F | 1.67 in. |
| November | 18.4 °F | 34.6 °F | 0.86 in. |
| December | 4.2 °F | 19.8 °F | 0.7 in. |
| Annual | 28.8 °F | 48.7 °F | 21.03 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4a : -30°F to -25°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 |