Ririe, Idaho has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 31.3 °F (low) to 56.4 °F (high). Annual precipitation averages 12.5 Inches. Ririe 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 | 12.5 °F | 29.1 °F | 1.14 in. |
| February | 15.6 °F | 33.5 °F | 0.8 in. |
| March | 24.4 °F | 45.5 °F | 0.95 in. |
| April | 30.5 °F | 56.0 °F | 1.35 in. |
| May | 38.3 °F | 65.2 °F | 1.8 in. |
| June | 45.0 °F | 73.8 °F | 1.22 in. |
| July | 50.7 °F | 84.4 °F | 0.52 in. |
| August | 49.3 °F | 84.0 °F | 0.71 in. |
| September | 41.5 °F | 73.5 °F | 1.02 in. |
| October | 31.9 °F | 58.8 °F | 1.15 in. |
| November | 22.5 °F | 42.5 °F | 0.94 in. |
| December | 13.9 °F | 30.4 °F | 0.94 in. |
| Annual | 31.3 °F | 56.4 °F | 12.54 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 |