National Weather Service guidance and ensemble model consensus for July 18 point to daytime highs in the upper 80s to low 90s under a modest ridge with warm-air advection and limited mixing, placing the 88–91 °F bins at the center of trader positioning. This aligns closely with climatological normals near 85 °F while incorporating residual uncertainty from boundary-layer moisture and dew-point trends that could nudge readings a degree or two higher or lower. Recent mid-July warmth, including peaks near 96 °F earlier in the month, has kept the pattern slightly above average without signaling a major heat dome or cold-front passage that would shift probabilities sharply. Updated model runs and any afternoon observations will refine these implied probabilities ahead of market resolution.