The highest day temperature in August 2025 was 94°F. The lowest night temperature was 54°F. The average values for day and night temperatures during August were 82.7°F и 65.4°F respectivly.

You can expect various weather conditions during August. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in August for Harrisburg is 1.2 in. It makes august the most rainy month of the year.

The average wind speed in August is 4.8 mph. It makes August one of the most windless months of the year for Harrisburg.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Harrisburg in August is 7.5 hours.