Current National Weather Service forecasts and ensemble models indicate Atlanta’s minimum temperature on October 15 will likely fall in the low-to-mid 60s°F, driving the tight clustering of market probabilities around the 58–65°F bins. Clear skies and light, variable winds promote strong radiational cooling overnight, while a dominant high-pressure system and absence of frontal passages limit mixing or warming. Minor model differences in dewpoint depression, boundary-layer wind speed, and exact timing of any subtle moisture return create the narrow spread between leading outcomes. Official Atlanta-area station readings through the early morning hours will determine final resolution.