Starkweather, North Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -2.1 °C (low) to 9.1 °C (high). Annual precipitation averages 503.4 Millimeters. Starkweather 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 | -19.7 °C | -9.9 °C | 11.94 mm |
| February | -18.1 °C | -7.3 °C | 11.18 mm |
| March | -10.6 °C | -0.4 °C | 17.02 mm |
| April | -2.1 °C | 9.6 °C | 25.15 mm |
| May | 5.1 °C | 17.9 °C | 71.37 mm |
| June | 11.6 °C | 22.8 °C | 98.3 mm |
| July | 13.8 °C | 25.6 °C | 85.34 mm |
| August | 12.3 °C | 25.4 °C | 66.8 mm |
| September | 7 °C | 20.3 °C | 51.56 mm |
| October | -0.2 °C | 11.3 °C | 35.31 mm |
| November | -8.3 °C | 1.1 °C | 15.75 mm |
| December | -15.9 °C | -7 °C | 13.72 mm |
| Annual | -2.1 °C | 9.1 °C | 503.44 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 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 |