Oswego Weather in September

The climate in Oswego during September can be summarized as mild and a little damp.

September is in the fall / autumn in Oswego and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 22°C (71°F), whilst at night 12°C (54°F) is normal.

On average September is the 2nd wettest month of the year in Oswego with around 96mm 3.8 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 11 days, although this may vary considerably.

On the flip side this corresponds to an average of 6.9 hours of sunshine per day.

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Oswego in September 2024.