The Yakima Valley's borders include the sub-AVA of the Rattlesnake Hills to the north, the Horse Heaven Hills to the south and Red Mountain forming parts of its eastern boundaries.
Overall, the temperature of the Yakima Valley is more temperate than the rest of the greater Columbia Valley AVA,[REF] with average temperatures being 5 °F (3 °C) to 10 °F (6 °C) cooler [REF].