Altoona Weather in September

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

September is in the fall / autumn in Altoona and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 22°C (72°F), whilst at night 11°C (51°F) is normal.

On average September is the 6th wettest month of the year in Altoona with around 87mm 3.4 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 7.2 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 Altoona in September 2024.