**Official National Weather Service observations recorded a minimum temperature of 64–65°F at key NYC stations (including Central Park and LaGuardia references) on June 17, 2026, under mostly cloudy skies with light southerly flow that limited overnight radiative cooling.** This outcome aligned closely with pre-event model guidance from the NWS and major ensembles, which consistently projected overnight lows in that narrow band amid typical mid-June maritime air influence. Historical climatology for the date shows average lows near 65°F, providing additional context that reinforced trader confidence. The overwhelming 99.6% market-implied probability for 64–65°F reflects this strong data consensus backed by real capital at risk. Realistic challenges would require an unexpected late revision to the official climatological report (rare for NWS daily summaries) or a station-specific anomaly exceeding normal observational variance, though such shifts are uncommon once preliminary readings are confirmed.