Malta, Idaho has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 32.9 °F (low) to 61.8 °F (high). Annual precipitation averages 9.8 Inches. Malta is located in USDA Plant Hardiness Zone 6a. 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 | 18.1 °F | 37.0 °F | 0.75 in. |
| February | 21.2 °F | 41.7 °F | 0.47 in. |
| March | 26.8 °F | 51.8 °F | 0.75 in. |
| April | 31.1 °F | 59.4 °F | 1.12 in. |
| May | 38.3 °F | 68.5 °F | 1.59 in. |
| June | 44.6 °F | 78.5 °F | 0.84 in. |
| July | 50.9 °F | 88.9 °F | 0.56 in. |
| August | 49.2 °F | 87.8 °F | 0.78 in. |
| September | 41.1 °F | 77.8 °F | 0.83 in. |
| October | 31.9 °F | 63.9 °F | 0.81 in. |
| November | 23.9 °F | 48.4 °F | 0.58 in. |
| December | 17.8 °F | 37.4 °F | 0.69 in. |
| Annual | 32.9 °F | 61.8 °F | 9.77 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 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Exceptional Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |