Rockford, Idaho has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 0.2 °C (low) to 15 °C (high). Annual precipitation averages 252.7 Millimeters. Rockford is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.7 °C | -0.2 °C | 20.57 mm |
| February | -7.9 °C | 2.6 °C | 14.73 mm |
| March | -3.3 °C | 9.2 °C | 22.86 mm |
| April | -0.3 °C | 14.4 °C | 26.16 mm |
| May | 4.1 °C | 19.7 °C | 38.86 mm |
| June | 7.7 °C | 24.7 °C | 23.62 mm |
| July | 10.8 °C | 30.6 °C | 10.16 mm |
| August | 10 °C | 30.3 °C | 13.46 mm |
| September | 5.6 °C | 24.4 °C | 21.59 mm |
| October | 0.2 °C | 16.1 °C | 24.13 mm |
| November | -5 °C | 7.4 °C | 16.26 mm |
| December | -9.3 °C | 0.4 °C | 20.32 mm |
| Annual | 0.2 °C | 15 °C | 252.72 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |