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Frost Dates for Cincinnati, Ohio, United States of America

Coordinates: 39.162, -84.457

Growing Season

The last spring air frost in Cincinnati, Ohio, United States of America typically occurs around Apr 17, and the first autumn air frost around Sep 27. This gives a frost-free growing season of approximately 163 days.

USDA Hardiness Zone

This location falls in USDA Hardiness Zone 6b, where the average annual extreme minimum temperature is -20.6 to -17.8°C (-5 to 0°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 -4°C (25°F). The warmest month is July, with an average high of 30°C (86°F).

Frost Risk Breakdown

Frost dates at three temperature thresholds: Air frost (0°C / 32°F): Apr 17 (last spring) to Sep 27 (first autumn). Light ground frost (-1°C / 30°F): Apr 8 (last spring) to Oct 6 (first autumn). Hard ground frost (-2°C / 28°F): Mar 22 (last spring) to Oct 22 (first autumn).

We predict your growing zone to be approximately ...

USDA Growing Zone: USDA Growing Zone - 6b

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

Current Risk Level: Hard Ground Frost possible

for today based on past data only.

We predict a frost free growing season at your location from Apr 17 to Sep 27, which provides approximately 162 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 8 to Oct 6, which provides a total of 181 days for growing.

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