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Frost Dates for Houston, Texas, United States of America

Coordinates: 29.763, -95.363

Growing Season

The last spring air frost in Houston, Texas, United States of America typically occurs around Feb 6, and the first autumn air frost around Nov 28. This gives a frost-free growing season of approximately 296 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 8°C (46°F). The warmest month is August, with an average high of 35°C (95°F).

Frost Risk Breakdown

Frost dates at three temperature thresholds: Air frost (0°C / 32°F): Feb 6 (last spring) to Nov 28 (first autumn). Light ground frost (-1°C / 30°F): Jan 21 (last spring) to Dec 16 (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 Feb 6 to Nov 28, which provides approximately 294 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 Jan 21 to Dec 16, which provides a total of 329 days for growing.

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