Vader, Washington has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 5.7 °C (low) to 16.8 °C (high). Annual precipitation averages 1266.4 Millimeters. Vader is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.7 °C | 8.2 °C | 179.07 mm |
| February | 1.3 °C | 10.2 °C | 129.79 mm |
| March | 2.6 °C | 12.7 °C | 135.13 mm |
| April | 4.2 °C | 16.1 °C | 102.87 mm |
| May | 7.2 °C | 19.9 °C | 65.53 mm |
| June | 9.4 °C | 22.4 °C | 48.77 mm |
| July | 11.4 °C | 26.2 °C | 13.21 mm |
| August | 11.3 °C | 26.9 °C | 22.1 mm |
| September | 8.9 °C | 23.7 °C | 46.99 mm |
| October | 5.9 °C | 17.1 °C | 127.25 mm |
| November | 3.2 °C | 11 °C | 195.58 mm |
| December | 1.4 °C | 7.6 °C | 200.15 mm |
| Annual | 5.7 °C | 16.8 °C | 1266.44 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |