Whitewater, Montana has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 28.2 °F (low) to 55.1 °F (high). Annual precipitation averages 12.4 Inches. Whitewater is located in USDA Plant Hardiness Zone 3b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.3 °F | 23.8 °F | 0.4 in. |
| February | 4.7 °F | 29.0 °F | 0.29 in. |
| March | 16.7 °F | 41.1 °F | 0.39 in. |
| April | 29.0 °F | 57.1 °F | 0.9 in. |
| May | 39.4 °F | 66.7 °F | 1.66 in. |
| June | 48.5 °F | 75.2 °F | 2.91 in. |
| July | 54.0 °F | 84.3 °F | 1.5 in. |
| August | 51.9 °F | 84.5 °F | 1.18 in. |
| September | 41.6 °F | 73.3 °F | 1.28 in. |
| October | 29.4 °F | 57.5 °F | 0.84 in. |
| November | 16.5 °F | 40.7 °F | 0.56 in. |
| December | 5.6 °F | 27.7 °F | 0.44 in. |
| Annual | 28.2 °F | 55.1 °F | 12.35 in. |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 3b : -35°F to -30°F |
| Plant Hardiness Zone - 2012 | Zone 3b : -35°F to -30°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |