Orofino, Idaho has a Humid Continental Climate - Dry Warm Summer climate (Köppen classification: Dsa). Average annual temperatures range from 40.2 °F (low) to 63.9 °F (high). Annual precipitation averages 26.8 Inches. Orofino is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 28.2 °F | 39.8 °F | 2.76 in. |
| February | 29.3 °F | 45.9 °F | 2.66 in. |
| March | 32.9 °F | 54.9 °F | 2.98 in. |
| April | 38.2 °F | 63.5 °F | 2.8 in. |
| May | 45.0 °F | 72.5 °F | 2.33 in. |
| June | 50.8 °F | 78.8 °F | 1.93 in. |
| July | 55.0 °F | 90.5 °F | 0.71 in. |
| August | 54.6 °F | 91.0 °F | 0.61 in. |
| September | 47.8 °F | 80.3 °F | 0.98 in. |
| October | 39.3 °F | 63.3 °F | 2.17 in. |
| November | 33.1 °F | 47.5 °F | 3.23 in. |
| December | 27.9 °F | 38.6 °F | 3.61 in. |
| Annual | 40.2 °F | 63.9 °F | 26.77 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°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 |