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Frost Dates for Tucson, Arizona, United States of America

Coordinates: 32.222, -110.926

Growing Season

The last spring air frost in Tucson, Arizona, United States of America typically occurs around Apr 3, and the first autumn air frost around Oct 15. This gives a frost-free growing season of approximately 195 days.

USDA Hardiness Zone

This location falls in USDA Hardiness Zone 8a, where the average annual extreme minimum temperature is -12.2 to -9.4°C (10 to 15°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 5°C (41°F). The warmest month is June, with an average high of 37°C (99°F).

Frost Risk Breakdown

Frost dates at three temperature thresholds: Air frost (0°C / 32°F): Apr 3 (last spring) to Oct 15 (first autumn). Light ground frost (-1°C / 30°F): Mar 12 (last spring) to Oct 28 (first autumn). Hard ground frost (-2°C / 28°F): Feb 2 (last spring) to Nov 28 (first autumn).

We predict your growing zone to be approximately ...

USDA Growing Zone: USDA Growing Zone - 8a

... 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 3 to Oct 15, which provides approximately 194 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 Mar 12 to Oct 28, which provides a total of 230 days for growing.

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