climate prop · Chicago, IL · Great Lakes & Upper Midwest · settles 2026-10
Top-5 warmest Oct on record in Chicago
28¢
american +256 · decimal 3.56
on the tape
Needs a mean high of 67.7°F+ against 67 years of record (warmest: 74.8°F in 1963). Official NWS record.
The Tape
what the models knew, when
— — reconstructed from archived model runs (deterministic values + a lead-dependent Gaussian error model, labeled, never on the tape) · — live prices from the running consensus engine.
Receipts
prop id WP-KORD-2026-10-MAVG-TOP5 · opened 2026-10-01T00:10:19+00:00 · minted to the append-only hash-chained tape at open; the settle writes next to the mint · inspect the tape