Cavalier, North Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -1.8 °C (low) to 9.3 °C (high). Annual precipitation averages 534.2 Millimeters. 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 | -19.5 °C | -10.1 °C | 12.45 mm |
| February | -17.8 °C | -7.4 °C | 11.68 mm |
| March | -10.1 °C | -0.4 °C | 20.07 mm |
| April | -1.8 °C | 9.9 °C | 26.16 mm |
| May | 5.2 °C | 17.9 °C | 78.99 mm |
| June | 11.7 °C | 23.3 °C | 97.54 mm |
| July | 14 °C | 25.8 °C | 82.55 mm |
| August | 12.2 °C | 25.6 °C | 65.28 mm |
| September | 7.2 °C | 20.5 °C | 57.4 mm |
| October | 0.6 °C | 11.5 °C | 42.42 mm |
| November | -7.6 °C | 1.4 °C | 21.84 mm |
| December | -15.4 °C | -6.8 °C | 17.78 mm |
| Annual | -1.8 °C | 9.3 °C | 534.16 mm |
| 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 : -34.4°C to -31.7°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 |