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Frost Dates for Saint Paul, Minnesota, United States of America

Coordinates: 44.944, -93.093

Growing Season

The last spring air frost in Saint Paul, Minnesota, United States of America typically occurs around Apr 28, and the first autumn air frost around Sep 21. This gives a frost-free growing season of approximately 146 days.

USDA Hardiness Zone

This location falls in USDA Hardiness Zone 5a, where the average annual extreme minimum temperature is -28.9 to -26.1°C (-20 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 -13°C (9°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 28 (last spring) to Sep 21 (first autumn). Light ground frost (-1°C / 30°F): Apr 20 (last spring) to Oct 1 (first autumn). Hard ground frost (-2°C / 28°F): Apr 5 (last spring) to Oct 16 (first autumn).

We predict your growing zone to be approximately ...

USDA Growing Zone: USDA Growing Zone - 5a

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

Current Risk Level: Light Ground Frost possible

for today based on past data only.

We predict a frost free growing season at your location from Apr 28 to Sep 21, which provides approximately 145 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 20 to Oct 1, which provides a total of 164 days for growing.

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