Temperature for October
In Harrisburg, PA during October the average high temperature is 65.2°F. The hottest day on record was October 9, 2007 when the temperature hit 90.0°F.
Precipitation for October
In October the average monthly rainfall in Harrisburg, PA is 2.23 inches with rain usually falling on between 3 and 4 days. 1992 was the driest October with only 0.00 inches of rain falling, and 2005 was the wettest October with 6.59 inches of rain. The wettest single day in October was 8 October 2005 when 3.21 inches of rain fell.
In October there have been some years when thunderstorms have occurred, although there are other years when there hasn't been a thunderstorm in October.