when will it start cooling down

The cooling down typically starts gradually around mid to late September in many regions, with temperatures beginning to drop noticeably by the autumnal equinox near September 22. For example, in the Netherlands, temperatures begin to cool down significantly in late September, with average highs falling to around 16°C and lows around 11°C. In the United States, some northern and central states may experience the first cool fronts as early as mid-September to early October, but the real, consistent cool down often does not occur until November. This pattern includes cooler air surges moving southward and eastward, accompanied by a drop in overnight low temperatures. However, regions like Florida typically start to see cooler temperatures intermittently in the fall, with consistent relief from heat usually arriving by November.