Goldendale, Washington has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 3.1 °C (low) to 16.3 °C (high). Annual precipitation averages 392.9 Millimeters. Goldendale 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.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.9 °C | 4.1 °C | 63.5 mm |
| February | -2.2 °C | 7 °C | 45.21 mm |
| March | -0.4 °C | 11.1 °C | 38.35 mm |
| April | 1.7 °C | 15.2 °C | 25.91 mm |
| May | 5.2 °C | 20.3 °C | 24.89 mm |
| June | 8 °C | 24.1 °C | 13.46 mm |
| July | 11 °C | 29.8 °C | 4.32 mm |
| August | 10.8 °C | 29.8 °C | 5.84 mm |
| September | 7.2 °C | 25.1 °C | 9.14 mm |
| October | 2.6 °C | 16.9 °C | 30.73 mm |
| November | -0.7 °C | 8.7 °C | 55.37 mm |
| December | -3.1 °C | 3.6 °C | 76.2 mm |
| Annual | 3.1 °C | 16.3 °C | 392.92 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 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 | Normal |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |