Frost Dates for Turku, Western Finland, Finland

Coordinates: 60.450, 22.283

Growing Season

The last spring air frost in Turku, Western Finland, Finland typically occurs around May 16, and the first autumn air frost around Sep 17. This gives a frost-free growing season of approximately 124 days.

USDA Hardiness Zone

This location falls in USDA Hardiness Zone 6b, where the average annual extreme minimum temperature is -20.6 to -17.8°C (-5 to 0°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 -6°C (21°F). The warmest month is July, with an average high of 21°C (70°F).

Frost Risk Breakdown

Frost dates at three temperature thresholds: Air frost (0°C / 32°F): May 16 (last spring) to Sep 17 (first autumn). Light ground frost (-1°C / 30°F): May 4 (last spring) to Sep 29 (first autumn). Hard ground frost (-2°C / 28°F): Apr 16 (last spring) to Oct 28 (first autumn).

We predict your growing zone to be approximately ...

USDA Growing Zone: USDA Growing Zone - 6b

... 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 16 to Sep 17, which provides approximately 123 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 4 to Sep 29, which provides a total of 148 days for growing.

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