Rigby, Idaho has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 30.7 °F (low) to 56.6 °F (high). Annual precipitation averages 11.8 Inches. Rigby 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 | 11.3 °F | 28.7 °F | 1.12 in. |
| February | 14.7 °F | 33.4 °F | 0.71 in. |
| March | 24.0 °F | 45.9 °F | 0.96 in. |
| April | 30.4 °F | 56.6 °F | 1.23 in. |
| May | 38.1 °F | 65.7 °F | 1.72 in. |
| June | 44.6 °F | 74.2 °F | 1.12 in. |
| July | 50.1 °F | 84.7 °F | 0.46 in. |
| August | 48.4 °F | 84.2 °F | 0.66 in. |
| September | 40.8 °F | 73.8 °F | 0.97 in. |
| October | 31.0 °F | 59.1 °F | 1.05 in. |
| November | 21.7 °F | 42.7 °F | 0.8 in. |
| December | 13.0 °F | 30.1 °F | 1.0 in. |
| Annual | 30.7 °F | 56.6 °F | 11.8 in. |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |