Grapeview, Washington has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 6.1 °C (low) to 16.1 °C (high). Annual precipitation averages 1371.1 Millimeters. Grapeview is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.9 °C | 8.4 °C | 205.74 mm |
| February | 1.6 °C | 9.9 °C | 138.18 mm |
| March | 2.8 °C | 12.4 °C | 156.97 mm |
| April | 4.5 °C | 15.4 °C | 105.41 mm |
| May | 7.6 °C | 19.3 °C | 59.94 mm |
| June | 10 °C | 21.6 °C | 43.94 mm |
| July | 12 °C | 24.9 °C | 20.32 mm |
| August | 11.9 °C | 25.2 °C | 26.16 mm |
| September | 9.7 °C | 22.1 °C | 46.74 mm |
| October | 6.4 °C | 15.3 °C | 129.03 mm |
| November | 3.3 °C | 10.8 °C | 225.3 mm |
| December | 1.6 °C | 7.9 °C | 213.36 mm |
| Annual | 6.1 °C | 16.1 °C | 1371.09 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |