Frost Dates for Brantford, Ontario, Canada

Coordinates: 43.133, -80.267

Growing Season

The last spring air frost in Brantford, Ontario, Canada typically occurs around May 10, and the first autumn air frost around Sep 19. This gives a frost-free growing season of approximately 132 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 February, with an average low of -8°C (18°F). The warmest month is July, with an average high of 26°C (79°F).

Frost Risk Breakdown

Frost dates at three temperature thresholds: Air frost (0°C / 32°F): May 10 (last spring) to Sep 19 (first autumn). Light ground frost (-1°C / 30°F): Apr 30 (last spring) to Sep 28 (first autumn). Hard ground frost (-2°C / 28°F): Apr 16 (last spring) to Oct 13 (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: Hard Ground Frost possible

for today based on past data only.

We predict a frost free growing season at your location from May 10 to Sep 19, which provides approximately 131 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 30 to Sep 28, which provides a total of 151 days for growing.

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