Wonder Lake is located in McHenry County, Illinois. There are roughly 3,380 residents, living in 1,243 households. The average temperature for Wonder Lake this time of the year is low of 61F and high of 84F. On average, Wonder Lake gets about 3.73 inches of precipitation in July. Most residents are home owners (84%), have a post secondary degree (55%) and are single, no kids (34%).
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