Village in Illinois, United States
Dupo
Weather & Forecast
Dupo is a village in St. Clair County, Illinois, United States. As of the 2020 census, Dupo had a population of 3,996. The village was settled in about 1750 and was incorporated in 1907. Its modern name, adopted in the early 20th century, is shortened from Prairie du Pont.Wikipedia
Temperatures vary across four distinct seasons. Rain falls fairly evenly through the year. Spring and fall feel like real transition seasons. Annual snowfall is between 5 and 15 inches. Humidity stays fairly steady through the year.
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Where It Is
State Context
IllinoisU.S. stateIllinois is a state in the Midwestern United States. It borders on Lake Michigan to its northeast, the Mississippi River to its west, and the Wabash and Ohio rivers to its south. Of the fifty U.S. states, Illinois has the fifth-largest gross domestic product (GDP), the sixth-largest population, and the 25th-most land area.Wikipedia
About the Region
Great Lakes MidwestThe Great Lakes Midwest includes lakefront metropolitan areas, inland cities, university towns, and rural communities. Chicago, Detroit, Cleveland, and Minneapolis illustrate different urban settings within this broad grouping.
Proximity to a Great Lake can influence local weather, but lake-effect snow does not affect every city equally. Inland and southern parts of the region also differ from northern lakefront locations. Compare local snowfall, temperatures, housing, and transport rather than assuming one regional pattern.
Nearby Parks & Nature
Closest protected landscapes, reserves, and big park systems surfaced from the same nearby feeds used in compare.
Federal Park Sites
Local Nature & Reserves
City Profile
Housing Costs & Income
Livability
Not a citywide average. Walkability varies by address.
38.51550, -90.21000 · Updated 2026-08-28
Walk Score · view mapped locationClimate Through the Year
Annual average of days with more than five hours of sunshine, not necessarily clear skies.
Comfort combines temperature band fit, humidity fit, seasonal swing, and penalties for long stretches of extreme heat or cold. Higher scores mean the yearly pattern stays closer to an easier day-to-day climate band.
Natural Hazard Risk
Local Next Steps
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