Frazer, Montana has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 29.6 °F (low) to 57 °F (high). Annual precipitation averages 13.3 Inches. Frazer is located in USDA Plant Hardiness Zone 4a. 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 | 1.8 °F | 24.3 °F | 0.38 in. |
| February | 6.1 °F | 29.9 °F | 0.31 in. |
| March | 18.1 °F | 43.5 °F | 0.6 in. |
| April | 29.9 °F | 59.0 °F | 0.92 in. |
| May | 40.7 °F | 69.5 °F | 2.08 in. |
| June | 50.5 °F | 78.2 °F | 2.82 in. |
| July | 55.8 °F | 87.0 °F | 2.17 in. |
| August | 53.7 °F | 86.9 °F | 1.25 in. |
| September | 43.7 °F | 75.6 °F | 1.2 in. |
| October | 30.8 °F | 59.3 °F | 0.8 in. |
| November | 17.8 °F | 41.9 °F | 0.48 in. |
| December | 6.6 °F | 28.6 °F | 0.32 in. |
| Annual | 29.6 °F | 57 °F | 13.33 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 4a : -30°F to -25°F |
| Plant Hardiness Zone - 2012 | Zone 3b : -35°F to -30°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |