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Frost Dates for Santa Clara, California, United States of America

Coordinates: 37.354, -121.954

Growing Season

The last spring air frost in Santa Clara, California, United States of America typically occurs around Apr 29, and the first autumn air frost around Nov 8. This gives a frost-free growing season of approximately 193 days.

USDA Hardiness Zone

This location falls in USDA Hardiness Zone 9a, where the average annual extreme minimum temperature is -6.7 to -3.9°C (20 to 25°F). This zone rating helps gardeners determine which perennial plants are likely to survive winter.

Temperature Overview

The coldest month is January, with an average low of 7°C (45°F). The warmest month is July, with an average high of 29°C (84°F).

Frost Risk Breakdown

Frost dates at three temperature thresholds: Air frost (0°C / 32°F): Apr 29 (last spring) to Nov 8 (first autumn). Light ground frost (-1°C / 30°F): Feb 13 (last spring) to Dec 15 (first autumn).

We predict your growing zone to be approximately ...

USDA Growing Zone: USDA Growing Zone - 9a

... and the frost data for your area is ...

Current Risk Level: Unlikely (Safest)

for today based on past data only.

We predict a frost free growing season at your location from Apr 29 to Nov 8, which provides approximately 192 frost free days.

For the less tender plants, or if you are planning to protect your plants with fleece etc, your growing season could stretch from Feb 13 to Dec 15, which provides a total of 305 days for growing.

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