Dietrich, Idaho has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 34.8 °F (low) to 60.9 °F (high). Annual precipitation averages 10.4 Inches. Dietrich is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 17.7 °F | 34.4 °F | 1.45 in. |
| February | 20.6 °F | 39.6 °F | 0.87 in. |
| March | 27.4 °F | 50.5 °F | 1.07 in. |
| April | 32.7 °F | 59.2 °F | 0.92 in. |
| May | 40.7 °F | 68.8 °F | 1.17 in. |
| June | 47.6 °F | 78.5 °F | 0.61 in. |
| July | 54.9 °F | 89.5 °F | 0.15 in. |
| August | 53.3 °F | 88.1 °F | 0.32 in. |
| September | 44.7 °F | 77.6 °F | 0.48 in. |
| October | 34.5 °F | 62.9 °F | 0.83 in. |
| November | 25.4 °F | 46.9 °F | 0.97 in. |
| December | 18.3 °F | 34.7 °F | 1.59 in. |
| Annual | 34.8 °F | 60.9 °F | 10.43 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°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 |