North Powder, Oregon has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 0.7 °C (low) to 15.4 °C (high). Annual precipitation averages 333 Millimeters. North Powder 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.1 - Sep. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.3 °C | 2.3 °C | 31.5 mm |
| February | -4.9 °C | 5.4 °C | 23.88 mm |
| March | -2.6 °C | 10.3 °C | 32.26 mm |
| April | -0.4 °C | 14.2 °C | 30.23 mm |
| May | 3.4 °C | 19.1 °C | 46.99 mm |
| June | 6.3 °C | 23.1 °C | 33.02 mm |
| July | 9.2 °C | 29.4 °C | 14.73 mm |
| August | 8.4 °C | 29.8 °C | 12.19 mm |
| September | 4.5 °C | 24.7 °C | 12.95 mm |
| October | -0.1 °C | 16.4 °C | 23.37 mm |
| November | -3.3 °C | 7.8 °C | 31.24 mm |
| December | -6.4 °C | 2.3 °C | 40.64 mm |
| Annual | 0.7 °C | 15.4 °C | 333 mm |
| Average First Frost Date | Sep.1 - Sep. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |