Current National Weather Service and model consensus points to a mostly sunny Sunday with highs in the upper 80s under light northeast flow, favoring the 88-89°F bin as the market leader while keeping 90°F+ odds modest. Persistent post-frontal northeasterly winds and limited moisture are suppressing peak heating relative to September’s 88.5°F climatological average, with only a 20-30% afternoon shower chance that would further cap temperatures. Recent September observations show frequent 88-92°F readings under similar setups, yet the current steering pattern and dewpoint profiles align more closely with 86-89°F outcomes. Traders are monitoring the next NWS update and any model shifts in boundary-layer mixing for resolution on September 27.