White Salmon, Washington has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 5.2 °C (low) to 16.7 °C (high). Annual precipitation averages 861.8 Millimeters. White Salmon is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.6 °C | 5.4 °C | 157.48 mm |
| February | -0.1 °C | 8.4 °C | 88.65 mm |
| March | 1.5 °C | 12.3 °C | 94.23 mm |
| April | 3.9 °C | 16 °C | 55.12 mm |
| May | 7.2 °C | 20.6 °C | 32 mm |
| June | 10 °C | 23.6 °C | 25.15 mm |
| July | 12.7 °C | 28.1 °C | 3.81 mm |
| August | 12.4 °C | 28.4 °C | 13.21 mm |
| September | 8.8 °C | 24.8 °C | 20.32 mm |
| October | 4.9 °C | 17.6 °C | 64.01 mm |
| November | 1.7 °C | 9.7 °C | 136.4 mm |
| December | -0.4 °C | 5.2 °C | 171.45 mm |
| Annual | 5.2 °C | 16.7 °C | 861.83 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |