 Average monthly temperatures in the vicinity of downtown Pottsville range from 27.3 °F in January to 72.3 °F in July, while in Mahanoy City they range from 24.3 °F in January to 69.3 °F in July.As of the census of 2000, there were 150,336 people, 60,530 households, and 40,131 families residing in the county.The population density was 193 people per square mile (75/km²).