Short-term forecast models from NOAA show considerable uncertainty for New York City’s maximum temperature on September 20, driving the broad distribution of trader probabilities across the 60–78°F ranges. Shifting high-pressure ridging and variable low-level moisture advection could produce daytime highs several degrees above or below late-September climatological norms near 72°F, while cloud cover and frontal timing add further spread. Ensemble guidance diverges notably on whether a weak trough will suppress temperatures or allow brief warming, keeping most outcome buckets near 18% implied probability. Updated model runs and official National Weather Service briefings over the next 48 hours will likely tighten the range as resolution approaches.