Hazelton, Idaho has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 35.9 °F (low) to 61.5 °F (high). Annual precipitation averages 10.9 Inches. Hazelton is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 19.9 °F | 36.4 °F | 1.36 in. |
| February | 22.8 °F | 41.6 °F | 0.77 in. |
| March | 29.0 °F | 52.1 °F | 1.05 in. |
| April | 33.7 °F | 59.4 °F | 1.02 in. |
| May | 41.6 °F | 68.7 °F | 1.27 in. |
| June | 48.6 °F | 78.3 °F | 0.65 in. |
| July | 55.6 °F | 88.7 °F | 0.2 in. |
| August | 53.4 °F | 87.5 °F | 0.31 in. |
| September | 45.1 °F | 77.5 °F | 0.55 in. |
| October | 35.1 °F | 63.3 °F | 1.01 in. |
| November | 26.2 °F | 48.1 °F | 1.05 in. |
| December | 20.0 °F | 36.6 °F | 1.66 in. |
| Annual | 35.9 °F | 61.5 °F | 10.9 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |