Emmett, Idaho has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 39.1 °F (low) to 64.7 °F (high). Annual precipitation averages 11.5 Inches. Emmett is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 23.7 °F | 38.2 °F | 1.47 in. |
| February | 26.9 °F | 46.2 °F | 1.11 in. |
| March | 32.1 °F | 56.6 °F | 1.35 in. |
| April | 36.7 °F | 63.5 °F | 1.0 in. |
| May | 44.8 °F | 72.9 °F | 1.2 in. |
| June | 51.5 °F | 81.3 °F | 0.71 in. |
| July | 58.3 °F | 92.2 °F | 0.23 in. |
| August | 56.3 °F | 90.7 °F | 0.15 in. |
| September | 47.9 °F | 80.2 °F | 0.44 in. |
| October | 37.5 °F | 65.7 °F | 0.72 in. |
| November | 29.1 °F | 49.5 °F | 1.17 in. |
| December | 23.8 °F | 39.0 °F | 1.9 in. |
| Annual | 39.1 °F | 64.7 °F | 11.45 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 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 | Abnormally Dry |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |