Rosebud, Montana has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 33.7 °F (low) to 59.8 °F (high). Annual precipitation averages 14.5 Inches. Rosebud is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 10.0 °F | 32.6 °F | 0.46 in. |
| February | 13.2 °F | 37.0 °F | 0.47 in. |
| March | 23.1 °F | 48.5 °F | 0.75 in. |
| April | 33.2 °F | 59.0 °F | 1.65 in. |
| May | 43.1 °F | 68.6 °F | 2.56 in. |
| June | 52.5 °F | 78.4 °F | 2.47 in. |
| July | 58.7 °F | 88.3 °F | 1.49 in. |
| August | 56.2 °F | 87.1 °F | 1.05 in. |
| September | 46.0 °F | 76.6 °F | 1.37 in. |
| October | 34.1 °F | 60.3 °F | 1.23 in. |
| November | 22.0 °F | 46.4 °F | 0.55 in. |
| December | 12.3 °F | 34.9 °F | 0.46 in. |
| Annual | 33.7 °F | 59.8 °F | 14.51 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |