At 150 miles long and up to 60 miles wide, the Willamette Valley is relatively mild throughout the year, with cool, wet winters and warm, dry summers due to its positioning between the Coast Range to the west and the Cascades to the east. While moisture is abundant, most of the rainfall occurs in the winter, not during growing season. This temperate climate, combined with coastal marine influences, make the gentle growing conditions within the Valley ideal for cool climate grapes, including Pinot Noir.
Situated in a corridor where a cool marine air rushes in to replenish the hot, rising air of the eastern desert, the Columbia Valley AVA is approximately 24 miles east of the crest of the Cascades. The Columbia Valley offers a climate that is well defined and predictably varied. It has soils accumulated from floods, volcanic eruptions and landslides. Soils are generally well suited for grape growing.