Frost Dates for Seoul, South Korea

Coordinates: 37.566, 127.000

Growing Season

The last spring air frost in Seoul, South Korea typically occurs around Apr 14, and the first autumn air frost around Oct 11. This gives a frost-free growing season of approximately 180 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 January, with an average low of -6°C (21°F). The warmest month is August, with an average high of 30°C (86°F).

Frost Risk Breakdown

Frost dates at three temperature thresholds: Air frost (0°C / 32°F): Apr 14 (last spring) to Oct 11 (first autumn). Light ground frost (-1°C / 30°F): Apr 1 (last spring) to Oct 21 (first autumn). Hard ground frost (-2°C / 28°F): Mar 12 (last spring) to Nov 5 (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: Unlikely (Safest)

for today based on past data only.

We predict a frost free growing season at your location from Apr 14 to Oct 11, which provides approximately 179 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 1 to Oct 21, which provides a total of 203 days for growing.

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