Frost Dates for Kotka, Southern Finland, Finland

Coordinates: 60.467, 26.917

Growing Season

The last spring air frost in Kotka, Southern Finland, Finland typically occurs around May 7, and the first autumn air frost around Sep 23. This gives a frost-free growing season of approximately 139 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 -7°C (19°F). The warmest month is July, with an average high of 20°C (68°F).

Frost Risk Breakdown

Frost dates at three temperature thresholds: Air frost (0°C / 32°F): May 7 (last spring) to Sep 23 (first autumn). Light ground frost (-1°C / 30°F): Apr 26 (last spring) to Oct 5 (first autumn). Hard ground frost (-2°C / 28°F): Apr 10 (last spring) to Nov 1 (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: Hard Ground Frost possible

for today based on past data only.

We predict a frost free growing season at your location from May 7 to Sep 23, which provides approximately 138 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 26 to Oct 5, which provides a total of 162 days for growing.

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