What plant hardiness zone is Rio Vista

Rio Vista is located at Solano County, California (CA), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Rio Vista is 9b by the USDA scale.

Coldest zone's winter temperature is +25 … +30 °F.

Plants of 9b USDA hardiness zone suitable for outdoor gardening and growing in this winter frost zone 9b USDA.

Rio Vista, California @ wikipedia.