Santa Rita, Montana has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 29.8 °F (low) to 54.2 °F (high). Annual precipitation averages 12.7 Inches. Santa Rita 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 | 11.2 °F | 32.1 °F | 0.35 in. |
| February | 12.4 °F | 34.2 °F | 0.53 in. |
| March | 19.7 °F | 42.1 °F | 0.7 in. |
| April | 28.4 °F | 52.2 °F | 1.33 in. |
| May | 37.4 °F | 62.0 °F | 1.76 in. |
| June | 45.0 °F | 69.8 °F | 2.97 in. |
| July | 50.2 °F | 79.8 °F | 1.17 in. |
| August | 48.6 °F | 79.3 °F | 1.26 in. |
| September | 40.8 °F | 68.9 °F | 1.12 in. |
| October | 30.3 °F | 55.1 °F | 0.81 in. |
| November | 20.7 °F | 41.6 °F | 0.45 in. |
| December | 12.8 °F | 33.0 °F | 0.29 in. |
| Annual | 29.8 °F | 54.2 °F | 12.74 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 |