Kamiah, Idaho has a Humid Continental Climate - Dry Warm Summer climate (Köppen classification: Dsa). Average annual temperatures range from 39.7 °F (low) to 63.9 °F (high). Annual precipitation averages 22.7 Inches. Kamiah is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 28.0 °F | 39.5 °F | 1.97 in. |
| February | 29.3 °F | 46.2 °F | 1.67 in. |
| March | 33.0 °F | 55.3 °F | 2.42 in. |
| April | 37.9 °F | 63.1 °F | 2.79 in. |
| May | 44.5 °F | 72.4 °F | 2.6 in. |
| June | 50.1 °F | 79.1 °F | 2.3 in. |
| July | 54.6 °F | 91.0 °F | 0.89 in. |
| August | 53.5 °F | 91.5 °F | 0.78 in. |
| September | 46.7 °F | 80.2 °F | 1.04 in. |
| October | 38.8 °F | 62.9 °F | 1.78 in. |
| November | 32.7 °F | 47.3 °F | 2.56 in. |
| December | 27.6 °F | 38.2 °F | 1.91 in. |
| Annual | 39.7 °F | 63.9 °F | 22.71 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dsa - Humid Continental Climate - Dry Warm Summer |