Frost Dates for Moncton, New Brunswick, Canada

Coordinates: 46.083, -64.767

Growing Season

The last spring air frost in Moncton, New Brunswick, Canada typically occurs around May 21, and the first autumn air frost around Sep 18. This gives a frost-free growing season of approximately 120 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 -11°C (12°F). The warmest month is July, with an average high of 24°C (75°F).

Frost Risk Breakdown

Frost dates at three temperature thresholds: Air frost (0°C / 32°F): May 21 (last spring) to Sep 18 (first autumn). Light ground frost (-1°C / 30°F): May 10 (last spring) to Sep 29 (first autumn). Hard ground frost (-2°C / 28°F): Apr 21 (last spring) to Oct 17 (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 May 21 to Sep 18, which provides approximately 119 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 29, which provides a total of 142 days for growing.

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