Grapeview, Washington has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 43 °F (low) to 61 °F (high). Annual precipitation averages 54 Inches. 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 | 35.4 °F | 47.1 °F | 8.1 in. |
| February | 34.8 °F | 49.8 °F | 5.44 in. |
| March | 37.0 °F | 54.4 °F | 6.18 in. |
| April | 40.1 °F | 59.8 °F | 4.15 in. |
| May | 45.6 °F | 66.8 °F | 2.36 in. |
| June | 50.0 °F | 70.9 °F | 1.73 in. |
| July | 53.6 °F | 76.8 °F | 0.8 in. |
| August | 53.5 °F | 77.3 °F | 1.03 in. |
| September | 49.4 °F | 71.7 °F | 1.84 in. |
| October | 43.5 °F | 59.6 °F | 5.08 in. |
| November | 38.0 °F | 51.5 °F | 8.87 in. |
| December | 34.9 °F | 46.2 °F | 8.4 in. |
| Annual | 43 °F | 61 °F | 53.98 in. |
| 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 : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |