Irwin is located in Westmoreland County, Pennsylvania. There are roughly 3,869 residents, living in 1,941 households. The average temperature for Irwin this time of the year is low of 60F and high of 82F. On average, Irwin gets about 3.79 inches of precipitation in August. 42% residents are home owners, have a post secondary degree (54%) and are single, no kids (56%).
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