Malta, Montana has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 30.2 °F (low) to 56.7 °F (high). Annual precipitation averages 13 Inches. Malta is located in USDA Plant Hardiness Zone 4a. 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 | 4.0 °F | 26.5 °F | 0.4 in. |
| February | 7.6 °F | 31.2 °F | 0.34 in. |
| March | 19.0 °F | 44.2 °F | 0.46 in. |
| April | 30.8 °F | 58.0 °F | 1.15 in. |
| May | 40.8 °F | 67.9 °F | 2.07 in. |
| June | 50.0 °F | 76.3 °F | 2.75 in. |
| July | 55.7 °F | 85.8 °F | 1.63 in. |
| August | 53.5 °F | 85.3 °F | 1.18 in. |
| September | 43.3 °F | 73.8 °F | 1.19 in. |
| October | 31.2 °F | 58.5 °F | 0.98 in. |
| November | 18.5 °F | 42.6 °F | 0.49 in. |
| December | 7.9 °F | 30.1 °F | 0.39 in. |
| Annual | 30.2 °F | 56.7 °F | 13.03 in. |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 11 - May 20 |
| 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 | Abnormally Dry |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |