Wibaux, Montana has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from -0.7 °C (low) to 13.1 °C (high). Annual precipitation averages 384.1 Millimeters. Wibaux is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -14.2 °C | -2.9 °C | 7.37 mm |
| February | -12.4 °C | -0.6 °C | 8.38 mm |
| March | -7.1 °C | 5.9 °C | 14.22 mm |
| April | -1.4 °C | 12.8 °C | 33.27 mm |
| May | 4.6 °C | 18.6 °C | 67.06 mm |
| June | 10 °C | 24.1 °C | 65.02 mm |
| July | 13.1 °C | 29.1 °C | 56.39 mm |
| August | 11.9 °C | 29.1 °C | 41.15 mm |
| September | 6.7 °C | 23.1 °C | 39.88 mm |
| October | -0.1 °C | 13.8 °C | 32 mm |
| November | -7 °C | 5.3 °C | 11.18 mm |
| December | -12.1 °C | -0.8 °C | 8.13 mm |
| Annual | -0.7 °C | 13.1 °C | 384.05 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 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 | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |