Frost Dates for Christchurch, New Zealand

Coordinates: -43.533, 172.633

Growing Season

The last spring air frost in Christchurch, New Zealand typically occurs around Oct 28, and the first autumn air frost around Apr 21. This gives a frost-free growing season of approximately -190 days.

USDA Hardiness Zone

This location falls in USDA Hardiness Zone 9a, where the average annual extreme minimum temperature is -6.7 to -3.9°C (20 to 25°F). This zone rating helps gardeners determine which perennial plants are likely to survive winter.

Temperature Overview

The coldest month is July, with an average low of 4°C (39°F). The warmest month is January, with an average high of 21°C (70°F).

Frost Risk Breakdown

Frost dates at three temperature thresholds: Air frost (0°C / 32°F): Oct 28 (last spring) to Apr 21 (first autumn). Light ground frost (-1°C / 30°F): Sep 30 (last spring) to May 27 (first autumn).

We predict your growing zone to be approximately ...

USDA Growing Zone: USDA Growing Zone - 9a

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

Current Risk Level: Air Frost possible

for today based on past data only.

We predict a frost free growing season at your location from Oct 28 to Apr 21, which provides approximately 174 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 Sep 30 to May 27, which provides a total of 239 days for growing.

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