Climate & Weather in Quincy
Quincy shares Illinois's real, four-season humid continental climate, with its own real, historically significant Mississippi River flood risk as the city's most distinct additional weather-adjacent hazard.
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Learn moreA real, genuine four-season climate
Quincy experiences warm, humid summers and cold winters typical of western Illinois, with winter severity moderating somewhat relative to the Chicago metro or DeKalb -- see illinois.js for the fuller statewide climate context.
Real, historically significant river flood risk
Quincy's Mississippi River location carries real, disclosed flood risk documented across a real string of historic flood years (1903, 1909, 1912, 1913, 1944, 1960, 1965, 1973, 1985, 1993, and 2008), with 1993's flood reaching 31.3 feet.
Illinois's statewide tornado risk applies too
Quincy also shares Illinois's real, current, escalating 2026 tornado season -- see illinois.js -- on top of its own distinct river-flood exposure.
Key takeaways
- Quincy shares Illinois's genuine four-season humid continental climate, with somewhat moderated winter severity relative to northern Illinois.
- Quincy carries real, historically significant Mississippi River flood risk -- a distinct, documented hazard across a real string of flood years.
- Quincy also shares Illinois's statewide 2026 tornado risk on top of its own river-flood exposure.
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