Orofino, Idaho has a Humid Continental Climate - Dry Warm Summer climate (Köppen classification: Dsa). Average annual temperatures range from 4.5 °C (low) to 17.7 °C (high). Annual precipitation averages 679.9 Millimeters. 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 | -2.1 °C | 4.3 °C | 70.1 mm |
| February | -1.5 °C | 7.7 °C | 67.56 mm |
| March | 0.5 °C | 12.7 °C | 75.69 mm |
| April | 3.4 °C | 17.5 °C | 71.12 mm |
| May | 7.2 °C | 22.5 °C | 59.18 mm |
| June | 10.4 °C | 26 °C | 49.02 mm |
| July | 12.8 °C | 32.5 °C | 18.03 mm |
| August | 12.6 °C | 32.8 °C | 15.49 mm |
| September | 8.8 °C | 26.8 °C | 24.89 mm |
| October | 4.1 °C | 17.4 °C | 55.12 mm |
| November | 0.6 °C | 8.6 °C | 82.04 mm |
| December | -2.3 °C | 3.7 °C | 91.69 mm |
| Annual | 4.5 °C | 17.7 °C | 679.93 mm |
| 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 : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dsa - Humid Continental Climate - Dry Warm Summer |