Homestead, Montana has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from -1.8 °C (low) to 12.3 °C (high). Annual precipitation averages 353.3 Millimeters. Homestead 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.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -17.3 °C | -5.4 °C | 7.37 mm |
| February | -14.8 °C | -2.4 °C | 5.84 mm |
| March | -8.4 °C | 4.3 °C | 11.43 mm |
| April | -1.6 °C | 13.2 °C | 22.35 mm |
| May | 4.4 °C | 19.8 °C | 55.88 mm |
| June | 10.2 °C | 24.3 °C | 76.71 mm |
| July | 12.8 °C | 28.6 °C | 63.75 mm |
| August | 11.6 °C | 28.8 °C | 36.07 mm |
| September | 5.8 °C | 22.8 °C | 27.94 mm |
| October | -1.1 °C | 13.3 °C | 22.61 mm |
| November | -8.4 °C | 3.8 °C | 13.21 mm |
| December | -14.5 °C | -3 °C | 10.16 mm |
| Annual | -1.8 °C | 12.3 °C | 353.32 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 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 |