Harrisburg Weather in August

The climate in Harrisburg during August can be summarized as hot, humid and a little damp.

August is in the summer in Harrisburg and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around a muggy 32°C (89°F), whilst at night 18°C (65°F) is normal.

On average August is the 5th driest month of the year in Harrisburg with around 85mm 3.3 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.

On the flip side this corresponds to an average of 10.3 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 Harrisburg in August 2025.