Recent forecasts from NOAA and private models indicate Chicago's overnight low on August 29 will likely settle in the mid-60s, driven by persistent southwesterly winds of 10-15 mph, increasing cloud cover, and a lack of clear-sky radiational cooling under moderate humidity. These conditions limit the typical nocturnal temperature drop compared to calmer August nights. Historical climatology places the average low near 65°F, with recent observations showing similar mild patterns without an incoming cold front. Trader emphasis on the 64-67°F bins reflects model consensus around these values, though minor shifts in wind or cloud timing could adjust the exact minimum recorded at official stations.