Pleasant fall weather continues across Southern California, with temperatures running a few degrees above average in some coastal and valley areas and near normal in the mountains. Similar conditions will continue Tuesday before an unseasonably cool low-pressure system moves into the region Wednesday and Thursday, bringing gusty west winds, much cooler temperatures, and rain with possible thunderstorms. Expect partly cloudy skies today with highs in the upper 50s to around 60 degrees, west winds increasing to 10–15 mph during the afternoon. A few sprinkles or showers could develop this afternoon as moisture and instability increases across the region.

Clouds and winds will increase tonight into Wednesday as low pressure approaches with a few showers possible. Rainfall will become more widespread Wednesday afternoon, continuing through Thursday with isolated thunderstorms possible. Highs will cool to the 50s Wednesday and the mid to upper 40s Thursday, with snow level remaining above 8,000 feet. Showers will taper off Thursday night, giving way to drier conditions Friday and gradually warmer through the weekend. Rainfall totals of one-half to three-quarters of an inch are expected across much of the region, with locally 1–2 inches in the mountains and along the lower coastal slopes. Lighter amounts are expected in our deserts.

Another period of unsettled weather is possible toward the end of the month, although confidence remains too low to provide specific details.

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