The autumnal equinox — denoting the onset of the fall season — begins at 7:29 p.m. today Pacific time.
Equinox — Latin for equal night — is a time when the daylight and nighttime hours are of about equal length.
Clear skies are expected over the Southland on the last afternoon of summer 2014, with highs in the 80s in some areas, and topping 90 degrees in the valleys.
Winds to 20 miles an hour are possible in the Santa Clarita and Antelope valleys.