Naches, Washington has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 2.8 °C (low) to 16.3 °C (high). Annual precipitation averages 251.5 Millimeters. Naches is located in USDA Plant Hardiness Zone 7a. 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 | -4.9 °C | 2.9 °C | 39.37 mm |
| February | -3.6 °C | 6.9 °C | 27.69 mm |
| March | -1.1 °C | 11.7 °C | 23.62 mm |
| April | 1.7 °C | 16 °C | 16.51 mm |
| May | 5.9 °C | 21.2 °C | 21.59 mm |
| June | 9.2 °C | 24.8 °C | 14.73 mm |
| July | 12.3 °C | 30.1 °C | 8.38 mm |
| August | 11.7 °C | 29.6 °C | 4.83 mm |
| September | 7.4 °C | 24.8 °C | 8.38 mm |
| October | 2.1 °C | 16.8 °C | 22.35 mm |
| November | -2.4 °C | 8.3 °C | 24.13 mm |
| December | -5.3 °C | 2.5 °C | 39.88 mm |
| Annual | 2.8 °C | 16.3 °C | 251.46 mm |
| 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 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |