Rudyard, Montana has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 29.7 °F (low) to 56.1 °F (high). Annual precipitation averages 11.1 Inches. Rudyard 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 | 7.5 °F | 30.2 °F | 0.4 in. |
| February | 10.1 °F | 33.8 °F | 0.27 in. |
| March | 18.9 °F | 43.3 °F | 0.37 in. |
| April | 29.3 °F | 55.8 °F | 0.87 in. |
| May | 38.8 °F | 65.9 °F | 1.71 in. |
| June | 46.9 °F | 73.7 °F | 2.56 in. |
| July | 52.3 °F | 83.7 °F | 1.24 in. |
| August | 50.6 °F | 83.2 °F | 1.05 in. |
| September | 41.7 °F | 71.8 °F | 1.07 in. |
| October | 30.3 °F | 57.3 °F | 0.69 in. |
| November | 19.4 °F | 42.2 °F | 0.52 in. |
| December | 10.2 °F | 32.5 °F | 0.32 in. |
| Annual | 29.7 °F | 56.1 °F | 11.07 in. |
| 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 : -30°F to -25°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 |