Prairie Grove is located in McHenry County, Illinois. There are roughly 4,013 residents, living in 1,423 households. The average temperature for Prairie Grove this time of the year is low of 61F and high of 83F. On average, Prairie Grove gets about 3.67 inches of precipitation in July. Most residents are home owners (84%), have a post secondary degree (60%) and are married, no kids (32%).
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