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Frost Dates for Milford, Connecticut, United States of America

Coordinates: 41.222, -73.057

Growing Season

The last spring air frost in Milford, Connecticut, United States of America typically occurs around Apr 24, and the first autumn air frost around Oct 7. This gives a frost-free growing season of approximately 166 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 -3°C (27°F). The warmest month is July, with an average high of 28°C (82°F).

Frost Risk Breakdown

Frost dates at three temperature thresholds: Air frost (0°C / 32°F): Apr 24 (last spring) to Oct 7 (first autumn). Light ground frost (-1°C / 30°F): Apr 14 (last spring) to Oct 15 (first autumn). Hard ground frost (-2°C / 28°F): Mar 29 (last spring) to Oct 30 (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: Air Frost possible

for today based on past data only.

We predict a frost free growing season at your location from Apr 24 to Oct 7, which provides approximately 165 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 14 to Oct 15, which provides a total of 184 days for growing.

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