(CNN) - Say goodbye to summer. It’s officially Fall, y’all!
The autumnal equinox began Monday at 3:50 a.m. Eastern. This is the mid-point between the longest and shortest days of the year.
It's the moment when the sun is directly over the Equator and the Earth gets nearly the same amount of daylight and darkness.
Even though fall is here, it still may feel summer-like for a little longer.
According to the National Oceanic and Atmospheric Administration, much of the U.S. will have warmer than normal temperatures for part of the fall.
NOAA’s forecast shows that all 50 states could see a warmer than average fall.
Northern Alaska, the Southwest and much of New England are most likely to feel warmer than normal.
And hurricane season doesn’t officially end until Nov. 30, so that means the Gulf Coast and East Coast could still get soaked.