Frost Dates for Edmonton, Alberta, Canada

Coordinates: 53.550, -113.500

Growing Season

The last spring air frost in Edmonton, Alberta, Canada typically occurs around May 23, and the first autumn air frost around Aug 24. This gives a frost-free growing season of approximately 93 days.

USDA Hardiness Zone

This location falls in USDA Hardiness Zone 4a, where the average annual extreme minimum temperature is -34.4 to -31.7°C (-30 to -25°F). This zone rating helps gardeners determine which perennial plants are likely to survive winter.

Temperature Overview

The coldest month is February, with an average low of -15°C (5°F). The warmest month is July, with an average high of 23°C (73°F).

Frost Risk Breakdown

Frost dates at three temperature thresholds: Air frost (0°C / 32°F): May 23 (last spring) to Aug 24 (first autumn). Light ground frost (-1°C / 30°F): May 10 (last spring) to Sep 4 (first autumn). Hard ground frost (-2°C / 28°F): Apr 24 (last spring) to Sep 19 (first autumn).

We predict your growing zone to be approximately ...

USDA Growing Zone: USDA Growing Zone - 4a

... 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 23 to Aug 24, which provides approximately 92 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 10 to Sep 4, which provides a total of 117 days for growing.

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