Pennsylvania topographic maps

The warmest month of the year in Pittsburgh is July, with a 24-hour average of 72.6 °F (22.6 °C). Conditions are often humid, and combined with highs reaching 90 °F (32 °C) on an average 9.5 days a year, a considerable heat index arises. The coolest month is January, when the 24-hour average is 28.4 °F…

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On January 11, 1814, Isaac Rohrer laid out the town that became known as Mountville, dividing it into 130 building lots, sold by lottery. Located 4 miles (6 km) east of Columbia in West Hempfield Township on the Lancaster and Susquehanna Turnpike, Mountville was originally named "Mount Pleasant" because it was…

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