Alton Weather in September

September is one of the excellent months to visit Alton, with daytime temperatures of 20°C (68°F) and lows of 11°C (52°F) at night. Some rainfall is typical for this time of year.

Rainfall in Alton in September

Analyzing past climate data, one can expect approximately 12 days of rain, averaging 59 mm (2.3 in). Rain this month is fairly typical, a standard mix of wet and dry days with no particularly heavy or persistent showers.

Temperature in Alton in September

If you're visiting Alton in September, expect excellent temperatures with highs of 20°C (68°F) and overnight lows of 11°C (52°F). This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. Nights drop to around 11°C (52°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.

Sunshine in Alton in September

The month experiences a moderate amount of sunlight, with 149 hours of sunshine. This provides a nice balance between sunshine and clouds.

If you favor pleasant temperatures and minimal rainfall, September is one of the best months to visit Alton.