Ryegate, Montana has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 32 °F (low) to 60 °F (high). Annual precipitation averages 14.6 Inches. Ryegate is located in USDA Plant Hardiness Zone 4b. 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 | 14.2 °F | 38.2 °F | 0.38 in. |
| February | 15.3 °F | 40.8 °F | 0.44 in. |
| March | 22.7 °F | 49.6 °F | 0.73 in. |
| April | 30.1 °F | 58.1 °F | 1.59 in. |
| May | 39.2 °F | 67.1 °F | 2.5 in. |
| June | 47.8 °F | 75.6 °F | 2.89 in. |
| July | 53.4 °F | 85.5 °F | 1.57 in. |
| August | 51.0 °F | 84.7 °F | 1.16 in. |
| September | 42.5 °F | 74.3 °F | 1.11 in. |
| October | 31.9 °F | 60.9 °F | 1.16 in. |
| November | 21.8 °F | 46.9 °F | 0.57 in. |
| December | 14.6 °F | 37.8 °F | 0.49 in. |
| Annual | 32 °F | 60 °F | 14.59 in. |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 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 | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |