Rockland, Idaho has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 33.1 °F (low) to 59.8 °F (high). Annual precipitation averages 12.4 Inches. Rockland is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 17.1 °F | 33.9 °F | 1.11 in. |
| February | 20.1 °F | 38.9 °F | 0.84 in. |
| March | 26.7 °F | 49.6 °F | 1.04 in. |
| April | 31.5 °F | 57.5 °F | 1.43 in. |
| May | 38.8 °F | 67.4 °F | 1.57 in. |
| June | 44.9 °F | 77.5 °F | 1.07 in. |
| July | 51.4 °F | 88.0 °F | 0.49 in. |
| August | 50.1 °F | 86.8 °F | 0.61 in. |
| September | 41.7 °F | 76.2 °F | 0.93 in. |
| October | 32.7 °F | 61.5 °F | 1.06 in. |
| November | 24.5 °F | 46.1 °F | 1.0 in. |
| December | 17.6 °F | 34.7 °F | 1.24 in. |
| Annual | 33.1 °F | 59.8 °F | 12.39 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |