climate prop · Des Moines, IA · Great Lakes & Upper Midwest · settles 2026-09
Des Moines's Sep finishes warmer than normal
YES
settled · observed 77.57
on the tape
Mean high vs the 1991–2020 normal (77.1°F) on the official record. 6 days banked, 15 in the forecast window, 9 on climatology.
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-KDSM-2026-09-MAVG-ABOVE · opened 2026-09-07T14:25:59+00:00 · settled 2026-10-02T11:39:47+00:00 against ACIS official NWS record (period-of-record climatology) · minted to the append-only hash-chained tape at open; the settle writes next to the mint · inspect the tape