Whitetail, Montana has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from -2.3 °C (low) to 11.1 °C (high). Annual precipitation averages 376.7 Millimeters. Whitetail is located in USDA Plant Hardiness Zone 3b. 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 | -17.2 °C | -6.2 °C | 12.45 mm |
| February | -15 °C | -3.8 °C | 9.65 mm |
| March | -8.9 °C | 2.8 °C | 17.02 mm |
| April | -2.2 °C | 11.8 °C | 26.67 mm |
| May | 3.7 °C | 18.2 °C | 52.83 mm |
| June | 9.1 °C | 23 °C | 81.53 mm |
| July | 11.7 °C | 27.2 °C | 59.44 mm |
| August | 10.7 °C | 27.6 °C | 37.34 mm |
| September | 5.5 °C | 21.6 °C | 28.19 mm |
| October | -1.3 °C | 12.6 °C | 22.1 mm |
| November | -8.6 °C | 2.8 °C | 14.73 mm |
| December | -14.8 °C | -4 °C | 14.73 mm |
| Annual | -2.3 °C | 11.1 °C | 376.68 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 3b : -37.2°C to -34.4°C |
| Plant Hardiness Zone - 2012 | Zone 3b : -37.2°C to -34.4°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |