Chicago, ILHigh ≥ 61°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.
EPS +43.20u · AIFS −43.20u
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 ↓ |
|---|---|---|---|---|---|
| IFS Ensemble | 85% | 69.0°F | 8.1°F | 2026-10-08 00:00 | 0.7276 |
| ICON | 83% | 70.0°F | 9.8°F | 2026-10-09 00:00 | 0.6956 |
| IFS HRES | 66% | 63.1°F | 6.3°F | 2026-10-09 00:00 | 0.4343 |
| WeatherNext 2 | 57% | 61.4°F | 5.3°F | 2026-10-08 18:00 | 0.3215 |
| National Blend | 53% | 61.0°F | 7.6°F | 2026-10-09 00:00 | 0.2767 |
| AIFS Single | 28% | 57.3°F | 5.6°F | 2026-10-09 00:00 | 0.0801 |
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 ≥ 61°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-GE61
Opened Oct 09 · 07:51 UTC
Original listing: Chicago high ≥ 61°F · Fri Oct 16
Original prop, full history & receipt ↗