Official National Weather Service observations at San Francisco International Airport recorded a daily maximum of 69°F on September 26, 2026, aligning precisely with the 68-69°F bin that now carries full market-implied probability. Persistent onshore flow from the Pacific maintained typical late-September marine layer conditions, suppressing temperatures well below the 1991-2020 average high near 71°F and preventing any afternoon warming that could have pushed readings into higher bins. With post-event data now finalized and no measurement revisions anticipated, trader consensus reflects near-certainty in the verified outcome. Only an unforeseen data correction or alternate station interpretation 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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