Recent National Weather Service and model guidance point to a mild overnight period for New York City on August 13, with limited radiational cooling under partly cloudy skies, moderate humidity, and light southerly flow keeping the minimum temperature near 72–75 °F. Warmer-than-average August conditions and an urban heat island effect further suppress overnight drops, while forecast uncertainty in cloud cover and dew-point trends accounts for the tight clustering of market-implied probabilities between the 70–71 °F and 74–75 °F bins. Ensemble spreads from operational models show only modest differences in boundary-layer mixing that could shift the low by a degree or two, explaining why traders assign the highest weight to these adjacent outcomes ahead of final observations from Central Park.