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Frost Dates for Greeley, Colorado, United States of America

Coordinates: 40.423, -104.709

Growing Season

The last spring air frost in Greeley, Colorado, United States of America typically occurs around May 15, and the first autumn air frost around Sep 5. This gives a frost-free growing season of approximately 113 days.

USDA Hardiness Zone

This location falls in USDA Hardiness Zone 6a, where the average annual extreme minimum temperature is -23.3 to -20.6°C (-10 to -5°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 -6°C (21°F). The warmest month is July, with an average high of 33°C (91°F).

Frost Risk Breakdown

Frost dates at three temperature thresholds: Air frost (0°C / 32°F): May 15 (last spring) to Sep 5 (first autumn). Light ground frost (-1°C / 30°F): May 5 (last spring) to Sep 14 (first autumn). Hard ground frost (-2°C / 28°F): Apr 17 (last spring) to Sep 27 (first autumn).

We predict your growing zone to be approximately ...

USDA Growing Zone: USDA Growing Zone - 6a

... 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 May 15 to Sep 5, which provides approximately 112 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 May 5 to Sep 14, which provides a total of 132 days for growing.

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