**National Weather Service guidance for New York City on August 20 points to a mostly sunny morning with a high near 81°F before clouds increase and a 40-50% chance of showers develops in the afternoon.** This timing of potential convection, combined with light northwest winds and dewpoints in the upper 60s, favors a peak in the low 80s rather than pushing into the mid-80s. Recent model runs show modest spread, with some solutions keeping skies clearer for readings near 82-83°F while others introduce earlier moisture that caps temperatures around 80°F. August climatology places the normal Central Park high near 83°F, but the current pattern—marked by a weaker Bermuda High and higher-than-average monthly temperatures overall—supports the market's tight clustering around the 80-83°F bins as traders weigh official forecasts against ensemble uncertainty and the narrow window for additional warming before any precipitation arrives.