Recent official forecasts from the National Weather Service and models indicate overnight lows for New York City on August 27 will likely settle near 70–71°F, as incoming showers and thunderstorms sustain cloud cover that limits radiative cooling and maintains elevated humidity. This setup favors the market's leading 70–71°F outcome at 37.5% implied probability over cooler bins, while the 29% chance assigned to 78°F or higher reflects uncertainty in how much daytime heat and storm timing could influence the daily minimum. Historical August climatology shows typical lows near 67°F, but the current pattern of southerly flow and 70% precipitation chances introduces a modest upward bias to minimum temperatures compared with recent drier nights that dipped into the mid-60s. Updated model runs and NHC guidance ahead of peak overnight hours remain the key variables for traders.