Temperature for January
In Harrisburg, PA during January the average high temperature is 39.3°F. The hottest day on record was January 6, 2007 when the temperature recorded was 69.1°F.

In Harrisburg, PA during January the average high temperature is 39.3°F. The hottest day on record was January 6, 2007 when the temperature recorded was 69.1°F.
In January the average monthly rainfall in Harrisburg, PA is 1.38 inches with rain usually falling on between 3 and 4 days. 1992 was the driest January with only 0.00 inches of rain falling, and 2006 was the wettest January with 4.93 inches of rain. The wettest single day in January was 14 January 2005 when 1.23 inches of rain fell.
In January it usually snows on between 2 and 3 days. In January there have been some years when thunderstorms have occurred, although there are other years when there hasn't been a thunderstorm in January.