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Frost Dates for Grimsby, Lincolnshire, United Kingdom

Coordinates: 53.567, -0.076

Growing Season

The last spring air frost in Grimsby, Lincolnshire, United Kingdom typically occurs around May 7, and the first autumn air frost around Oct 20. This gives a frost-free growing season of approximately 166 days.

USDA Hardiness Zone

This location falls in USDA Hardiness Zone 9a, where the average annual extreme minimum temperature is -6.7 to -3.9°C (20 to 25°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 2°C (36°F). The warmest month is August, with an average high of 20°C (68°F).

Frost Risk Breakdown

Frost dates at three temperature thresholds: Air frost (0°C / 32°F): May 7 (last spring) to Oct 20 (first autumn). Light ground frost (-1°C / 30°F): Apr 17 (last spring) to Nov 7 (first autumn). Hard ground frost (-2°C / 28°F): Jan 25 (last spring) to Dec 20 (first autumn).

We predict your growing zone to be approximately ...

USDA Growing Zone: USDA Growing Zone - 9a

... 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 7 to Oct 20, which provides approximately 165 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 17 to Nov 7, which provides a total of 204 days for growing.

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