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 61F and high of 84F. On average, Irwin gets about 4.21 inches of precipitation in July. 42% residents are home owners, have a post secondary degree (54%) and are single, no kids (56%).
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