Marissa, Illinois — City Overview

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Living in Marissa, summers are hot, with Jul highs around 89.0°F, while winters are chilly, with Feb lows around 26.6°F. Winter heating is a real budget factor — 3957 degree days means 4-5 months of meaningful energy bills. The area receives 49.5 inches of rainfall per year. Median household income: $48,644. With a 17.2% poverty rate and 73.0% homeownership, the community reflects a stable residential mix. Air quality is Good — avg AQI 43 over the past week.

View Marissa city guide

Updated October 21, 2026.

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