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Frost Dates for Tacoma, Washington, United States of America

Coordinates: 47.253, -122.443

Growing Season

The last spring air frost in Tacoma, Washington, United States of America typically occurs around May 16, and the first autumn air frost around Oct 5. This gives a frost-free growing season of approximately 142 days.

USDA Hardiness Zone

This location falls in USDA Hardiness Zone 8b, where the average annual extreme minimum temperature is -9.4 to -6.7°C (15 to 20°F). This zone rating helps gardeners determine which perennial plants are likely to survive winter.

Temperature Overview

The coldest month is February, with an average low of 2°C (36°F). The warmest month is August, with an average high of 26°C (79°F).

Frost Risk Breakdown

Frost dates at three temperature thresholds: Air frost (0°C / 32°F): May 16 (last spring) to Oct 5 (first autumn). Light ground frost (-1°C / 30°F): Apr 21 (last spring) to Oct 27 (first autumn). Hard ground frost (-2°C / 28°F): Feb 15 (last spring) to Jan 19 (first autumn).

We predict your growing zone to be approximately ...

USDA Growing Zone: USDA Growing Zone - 8b

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

Current Risk Level: Light Ground Frost possible

for today based on past data only.

We predict a frost free growing season at your location from May 16 to Oct 5, which provides approximately 141 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 Apr 21 to Oct 27, which provides a total of 189 days for growing.

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