Frost Dates for Dortmund, Nordrhein-Westfalen, Germany

Coordinates: 51.517, 7.450

Growing Season

The last spring air frost in Dortmund, Nordrhein-Westfalen, Germany typically occurs around May 11, and the first autumn air frost around Sep 27. This gives a frost-free growing season of approximately 139 days.

USDA Hardiness Zone

This location falls in USDA Hardiness Zone 8a, where the average annual extreme minimum temperature is -12.2 to -9.4°C (10 to 15°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 0°C (32°F). The warmest month is August, with an average high of 24°C (75°F).

Frost Risk Breakdown

Frost dates at three temperature thresholds: Air frost (0°C / 32°F): May 11 (last spring) to Sep 27 (first autumn). Light ground frost (-1°C / 30°F): Apr 28 (last spring) to Oct 12 (first autumn). Hard ground frost (-2°C / 28°F): Apr 3 (last spring) to Nov 7 (first autumn).

We predict your growing zone to be approximately ...

USDA Growing Zone: USDA Growing Zone - 8a

... 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 11 to Sep 27, 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 28 to Oct 12, which provides a total of 167 days for growing.

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