Powers, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 6.4 °C (low) to 18.8 °C (high). Annual precipitation averages 1501.1 Millimeters. Powers is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.1 °C | 12.1 °C | 247.9 mm |
| February | 3 °C | 13.6 °C | 185.42 mm |
| March | 3.7 °C | 14.8 °C | 207.77 mm |
| April | 4.9 °C | 17.2 °C | 143.76 mm |
| May | 7.3 °C | 19.7 °C | 82.04 mm |
| June | 9.4 °C | 22.6 °C | 34.29 mm |
| July | 11.2 °C | 26 °C | 6.86 mm |
| August | 10.9 °C | 26.8 °C | 7.87 mm |
| September | 8.9 °C | 25.9 °C | 26.42 mm |
| October | 6.7 °C | 21.2 °C | 100.33 mm |
| November | 4.6 °C | 14.6 °C | 196.09 mm |
| December | 2.7 °C | 11.3 °C | 262.38 mm |
| Annual | 6.4 °C | 18.8 °C | 1501.13 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |