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Frost Dates for Fort Smith, Arkansas, United States of America

Coordinates: 35.386, -94.398

Growing Season

The last spring air frost in Fort Smith, Arkansas, United States of America typically occurs around Mar 28, and the first autumn air frost around Oct 13. This gives a frost-free growing season of approximately 199 days.

USDA Hardiness Zone

This location falls in USDA Hardiness Zone 7b, where the average annual extreme minimum temperature is -15 to -12.2°C (5 to 10°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 0°C (32°F). The warmest month is July, with an average high of 34°C (93°F).

Frost Risk Breakdown

Frost dates at three temperature thresholds: Air frost (0°C / 32°F): Mar 28 (last spring) to Oct 13 (first autumn). Light ground frost (-1°C / 30°F): Mar 9 (last spring) to Oct 24 (first autumn). Hard ground frost (-2°C / 28°F): Feb 14 (last spring) to Nov 22 (first autumn).

We predict your growing zone to be approximately ...

USDA Growing Zone: USDA Growing Zone - 7b

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

Current Risk Level: Air Frost possible

for today based on past data only.

We predict a frost free growing season at your location from Mar 28 to Oct 13, which provides approximately 198 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 9 to Oct 24, which provides a total of 229 days for growing.

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