Harrisburg, PA Climate in September

Temperature for September

In Harrisburg, PA during September the average high temperature is 76.6°F. The hottest day on record was September 2, 2010 when the temperature hit 93.9°F.

Harrisburg, PA daily average and extreme temperature range for September

Low Temperature

During September the overnight temperature drops to an average of 58.1°F, with the lowest temperature of 37.0°F being recorded on September 28, 1991. In September it has never frozen overnight.

Precipitation for September

In September the average monthly rainfall in Harrisburg, PA is 1.77 inches with rain usually falling on between 4 and 5 days. 1992 was the driest September with only 0.00 inches of rain falling, and 2006 was the wettest September with 5.65 inches of rain. The wettest single day in September was 28 September 2010 when 2.12 inches of rain fell.

In September there have been some years when thunderstorms have occurred, although there are other years when there hasn't been a thunderstorm in September.