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Frost Dates for Horsham, West Sussex, United Kingdom

Coordinates: 51.071, -0.324

Growing Season

The last spring air frost in Horsham, West Sussex, United Kingdom typically occurs around May 14, and the first autumn air frost around Oct 17. This gives a frost-free growing season of approximately 156 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 2°C (36°F). The warmest month is July, with an average high of 22°C (72°F).

Frost Risk Breakdown

Frost dates at three temperature thresholds: Air frost (0°C / 32°F): May 14 (last spring) to Oct 17 (first autumn). Light ground frost (-1°C / 30°F): Apr 26 (last spring) to Nov 1 (first autumn). Hard ground frost (-2°C / 28°F): Mar 4 (last spring) to Dec 14 (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 14 to Oct 17, which provides approximately 155 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 26 to Nov 1, which provides a total of 189 days for growing.

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