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Climate Averages, Frost Dates, Hardiness Zones and Drought Conditions for Napa California
USDA Hardiness Zone 11 features a tropical climate with average minimum winter temperatures above 40°F (4.4°C). Gardeners and landscapers in Zone 11 can create thriving landscapes by selecting appropriate plants and employing specific gardening techniques to ensure the success of their gardens.
Climate Averages, Frost Dates, Hardiness Zones and Drought Conditions for Napa California
Zone 11a 40°F to 45°F. Based on the 1990 USDA Hardiness Zone Map, this interactive version covers the state of California which ranges from USDA Zone 4b to USDA Zone 11a.
22 gru 2023 · Determining your planting zone in California will enhance your gardening experience and help you select the right plants for your region. Because it is such a large state, California hardiness zone maps cover a wide range of temperatures and are divided into two sections.
Zone 11 represents any area where the average annual minimum temperature is above 40° F (4.4° C). The map shows twenty latitude and longitude lines. Areas above an arbitrary elevation are traditionally considered unsuitable for plant cropping and do not bear appropriate zone designations.
Compare the 2023 and 2012 USDA Plant Hardiness Zone Maps to see how the zones have changed over the last decade in your area. Minimum winter temperatures are a major determinant of whether a particular plant selection can be successfully grown outside year around.
