Horsham Weather in September

September in Horsham averages 18°C (64°F) during the day and 6°C (43°F) at night. It is the wettest month of the year, with 53 mm (2.1 in) of rainfall on average, so waterproof gear is a must.

Rainfall in Horsham in September

Since this is the rainiest month of the year, it's a good idea to carry an umbrella just in case. Climate statistics over the past 30 years suggest around 9 days of rain, with 53 mm (2.1 in) average for the month. A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.

Temperature in Horsham in September

Daytime highs in Horsham in September reach 18°C (64°F), with nights around 6°C (43°F). Even when the weather is stable, mornings and evenings can still feel distinctly cool. Nights drop to 6°C (43°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.

If you prefer dry days with pleasant temperatures, March, April, October, November and December typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.