Frost Dates for Bristol, Bristol, United Kingdom

Coordinates: 51.477, -2.570

Growing Season

The last spring air frost in Bristol, Bristol, United Kingdom typically occurs around May 13, and the first autumn air frost around Oct 13. This gives a frost-free growing season of approximately 153 days.

USDA Hardiness Zone

This location falls in USDA Hardiness Zone 8b, where the average annual extreme minimum temperature is -9.4 to -6.7°C (15 to 20°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 3°C (37°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 13 (last spring) to Oct 13 (first autumn). Light ground frost (-1°C / 30°F): Apr 28 (last spring) to Oct 28 (first autumn). Hard ground frost (-2°C / 28°F): Apr 4 (last spring) to Dec 7 (first autumn).

We predict your growing zone to be approximately ...

USDA Growing Zone: USDA Growing Zone - 8b

... 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 May 13 to Oct 13, which provides approximately 152 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 28, which provides a total of 183 days for growing.

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