Chicago, ILHigh ≥ 64°F
Who takes which side?
Probabilities derived from each source’s mean and spread. Forecasts may have different initialization times.
Head-to-head preview
ILLUSTRATIVE · NOT EXECUTED100 contracts at the midpoint of these model probabilities. Each contract pays 1u to the winning side.
ICON +44.50u · WN2 −44.50u
These are current forecast comparisons, not locked entries. No credits have been committed. Read the proposed policy →
Probability history
Recorded source probabilities; timestamps mark snapshots. Repeated values may come from the same model run.
Forecasts & evidence
| MODEL | YES | MEAN | SPREAD σ | INITIALIZATION UTC | BRIER ↓ |
|---|---|---|---|---|---|
| ICON | 95% | 75.3°F | 7.0°F | 2026-10-10 12:00 | 0.9101 |
| IFS Ensemble | 66% | 66.7°F | 7.5°F | 2026-10-11 00:00 | 0.4422 |
| NWS forecast | 54% | 64.0°F | 5.1°F | 2026-10-11 02:00 | 0.2905 |
| IFS HRES | 31% | 60.7°F | 5.8°F | 2026-10-11 00:00 | 0.0986 |
| National Blend | 29% | 61.0°F | 4.4°F | 2026-10-11 06:00 | 0.0818 |
| AIFS Single | 17% | 58.8°F | 4.9°F | 2026-10-11 06:00 | 0.0286 |
| WeatherNext 2 | 16% | 59.4°F | 4.0°F | 2026-10-11 00:00 | 0.0243 |
Spread is the standard deviation used in the probability approximation. It is not a measured confidence rating. Brier here scores the latest recorded snapshot, not a league deadline.
High ≥ 64°F · KORD
Daily temperature props settle on the ACIS official station record. Inclusive and strict thresholds retain their exact meanings. Provisional observations do not replace the settlement record.
WP-KORD-20261016-TMAX-GE64
Opened Oct 11 · 04:30 UTC
Original listing: Chicago high ≥ 64°F · Fri Oct 16
Original prop, full history & receipt ↗