Official National Weather Service observations at Chicago O’Hare recorded a daily maximum of 68°F on October 5, 2026, reached at 1:21 PM CDT under clear skies with light winds. This value exactly matched the 1991–2020 climatological normal for the date and reflected typical early-October radiative warming after overnight lows near 47°F. Multiple reporting stations and preliminary climatological summaries corroborated the reading, producing near-certain market-implied odds for the 68–69°F bin. Only an unforeseen revision to the official dataset or a station-specific anomaly would alter resolution.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedView resolved

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