Bantry, North Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -2.5 °C (low) to 10.4 °C (high). Annual precipitation averages 480.1 Millimeters. Bantry 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 | -19.8 °C | -8.7 °C | 13.46 mm |
| February | -17.7 °C | -5.8 °C | 13.46 mm |
| March | -10.4 °C | 1.1 °C | 18.8 mm |
| April | -2.3 °C | 11.3 °C | 24.38 mm |
| May | 4.8 °C | 18.9 °C | 64.01 mm |
| June | 11 °C | 23.8 °C | 98.81 mm |
| July | 13.2 °C | 26.8 °C | 74.93 mm |
| August | 11.6 °C | 26.9 °C | 57.15 mm |
| September | 6.2 °C | 21.4 °C | 41.91 mm |
| October | -1.1 °C | 12.3 °C | 35.05 mm |
| November | -9.1 °C | 2.1 °C | 20.83 mm |
| December | -16.2 °C | -5.8 °C | 17.27 mm |
| Annual | -2.5 °C | 10.4 °C | 480.06 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 |