Frost Dates for Sofia, Grad Sofiya, Bulgaria

Coordinates: 42.683, 23.317

Growing Season

The last spring air frost in Sofia, Grad Sofiya, Bulgaria typically occurs around May 13, and the first autumn air frost around Sep 12. This gives a frost-free growing season of approximately 122 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 -4°C (25°F). The warmest month is August, with an average high of 28°C (82°F).

Frost Risk Breakdown

Frost dates at three temperature thresholds: Air frost (0°C / 32°F): May 13 (last spring) to Sep 12 (first autumn). Light ground frost (-1°C / 30°F): Apr 28 (last spring) to Sep 25 (first autumn). Hard ground frost (-2°C / 28°F): Apr 6 (last spring) to Oct 21 (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 13 to Sep 12, which provides approximately 121 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 Sep 25, which provides a total of 150 days for growing.

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