Frost Dates for Tallinn, Harjumaa, Estonia

Coordinates: 59.434, 24.728

Growing Season

The last spring air frost in Tallinn, Harjumaa, Estonia typically occurs around May 18, and the first autumn air frost around Sep 18. This gives a frost-free growing season of approximately 123 days.

USDA Hardiness Zone

This location falls in USDA Hardiness Zone 7a, where the average annual extreme minimum temperature is -17.8 to -15°C (0 to 5°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 -5°C (23°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 18 (last spring) to Sep 18 (first autumn). Light ground frost (-1°C / 30°F): May 7 (last spring) to Sep 30 (first autumn). Hard ground frost (-2°C / 28°F): Apr 17 (last spring) to Oct 27 (first autumn).

We predict your growing zone to be approximately ...

USDA Growing Zone: USDA Growing Zone - 7a

... 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 18 to Sep 18, which provides approximately 122 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 7 to Sep 30, which provides a total of 146 days for growing.

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