Persistent summer heat across South Florida, with recent overnight lows near 80–82°F and National Weather Service forecasts calling for similar readings around 79–81°F on August 19, drives trader focus on the 78–81°F bins. Dry conditions and light winds have limited radiational cooling, while daytime highs near 95°F sustain elevated boundary-layer temperatures that carry into the early morning. Long-range guidance and climatological normals for Miami in mid-August reinforce this range, with little model consensus for a stronger easterly flow or convective activity that could drop readings into the mid-70s. The market’s heavy weighting toward 80–81°F reflects this stable, above-average warmth.