Frost Dates for Hamilton, New Zealand

Coordinates: -37.783, 175.283

Growing Season

The last spring air frost in Hamilton, New Zealand typically occurs around Oct 20, and the first autumn air frost around Apr 29. This gives a frost-free growing season of approximately -174 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 5°C (41°F). The warmest month is February, with an average high of 24°C (75°F).

Frost Risk Breakdown

Frost dates at three temperature thresholds: Air frost (0°C / 32°F): Oct 20 (last spring) to Apr 29 (first autumn). Light ground frost (-1°C / 30°F): Aug 26 (last spring) to Jun 20 (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 20 to Apr 29, which provides approximately 190 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 Aug 26 to Jun 20, which provides a total of 298 days for growing.

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