A cooler weather pattern is expected across different regions in the U.S., with temperatures dipping below average in some areas. In Atlanta, the National Weather Service forecasts temperatures ranging from the mid-60s to low 70s during the day and 40s to 50s at night. Meanwhile, Louisville will see a chilly start with temperatures in the 40s, warming up to the upper 70s as the day progresses, followed by a cold front over the weekend. In the Midwest, Friday will be warm with highs in the 70s and 80s, but a significant cooldown is expected on Sunday with highs dropping to the 60s and 70s. East Texas will experience a warm weekend with temperatures reaching the 90s before a cold front brings cooler weather next week. Overall, the fall season is bringing cooler temperatures and some regions might see a chance of isolated showers.