A high pressure will create a pretty nice end to the weekend. Under a mostly clear sky lows will drop to the upper 40s. Expect a mostly sunny sky on Sunday with highs in the lower 70s. The autumn equinox arrives on Sunday at 3:44 pm.
Tonight - Clear and Cool. Lows in the upper 40s. Wind from the NNW at 5-10 mph.
Sunday – Mostly Sunny and Nice! Highs in the lower 70s. Wind from the NNE at 5-10 mph.
Sunday Night – Clear and Cool. Lows in the middle 40s. Wind from the NE at 5-10 mph.
Monday – Mostly Sunny. Highs in the middle 70s. Wind from the E at 5-10 mph.
Here's a quick video on the science behind the autumn equinox.