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 56F and high of 80F. On average, Irwin gets about 4.05 inches of precipitation in June. 42% residents are home owners, have a post secondary degree (54%) and are single, no kids (56%).
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