The 10 day weather forecast for Horsham, on Sunday 1st November 2026 - updated every hour:
Low 7°C
35%
Low 7°C
7%
Low 6°C
19%
Low 5°C
4%
Low 5°C
6%
Low 4°C
13%
Low 4°C
16%
Low 4°C
13%
Low 5°C
41%
Low 5°C
24%
Like the rest of West Sussex, Horsham has a fairly mild, temperate climate. Summers (June to August) typically bring warm days in the low-to-mid 20s°C, while winters (December to February) are cool and damp, usually staying between 2°C and 8°C, with occasional frost. Spring and autumn are generally mild, with usually great summers, though rain can arrive at any time of year, so it's always worth checking the forecast here before heading out.
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