When Does Fall Start 2024 In Florida. 2024 fall weather forecast for the u.s. The first day of fall, or autumnal equinox, is on sunday, sept.
The autumnal equinox is the first official day of fall and marks the start of the season. Starts on tuesday, march 19 at 11:06 pm, and ends on june 20 at 4:51 pm.