Sykeston, North Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -1.1 °C (low) to 10.6 °C (high). Annual precipitation averages 502.2 Millimeters. Sykeston 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 | -17.7 °C | -7.8 °C | 11.94 mm |
| February | -15.7 °C | -5.3 °C | 12.7 mm |
| March | -9.1 °C | 1.6 °C | 17.27 mm |
| April | -1.7 °C | 10.9 °C | 29.97 mm |
| May | 5.5 °C | 18.6 °C | 67.06 mm |
| June | 11.8 °C | 23.8 °C | 95 mm |
| July | 14.2 °C | 26.7 °C | 83.82 mm |
| August | 12.6 °C | 26.5 °C | 60.71 mm |
| September | 7.6 °C | 21.4 °C | 47.24 mm |
| October | 0.4 °C | 12.4 °C | 43.94 mm |
| November | -7.4 °C | 2.8 °C | 16.26 mm |
| December | -14.2 °C | -5 °C | 16.26 mm |
| Annual | -1.1 °C | 10.6 °C | 502.17 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 4a : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |