IPM WORKSHOP Fri 4/21 2pm - 4pm Mountain Horticultural Crops Research and Extension Center, 455 Research Dr. Mills River NC 28756 Mountain Horticultural Crops Research and Extension Center, 455 Research Dr. Mills River NC 28756 Henderson County Center Tomorrow.
Homefacts City Report. Duncannon is located in Perry County, PA. The population is 1,578, making Duncannon the 2nd largest city in Perry County. There are 3 public schools in Duncannon with an average Homefacts rating of C. The total crime rate for Duncannon is low, and there are 12 registered sex offenders residing in the city.
Pennsylvania Weather > Duncannon Weather Duncannon, PA Weather Duncannon, PA climate is warm during summer when temperatures tend to be in the 70's and very cold during winter when temperatures tend to be in the 20's. The warmest month of the year is July with an average maximum temperature of 84.60 degrees Fahrenheit, while the coldest month of the year is January with an average minimum temperature of 19.40 degrees Fahrenheit.