Rancho Bernardo
The view Monday from weather service San Diego headquarters in Rancho Bernardo. Photo via @NWSSanDiego Twitter

Thunderheads gathered over the San Diego County mountains and deserts again on Monday, but the heavy rain fell mostly farther north, the National Weather Service reported.

Building high pressure aloft will decrease the shower activity Tuesday and Wednesday, but a return of monsoonal flow is expected for the remainder of the week.

A shallow marine layer along the coast, coupled with higher humidity over the Southwest much of the week, will keep daytime temperatures near, or below average, while overnight lows remain elevated.

High temperatures on Tuesday were predicted to be 75 to 80 near the coast, 82 to 87 inland, 86 to 91 in the western valleys, 90 to 95 near the foothills, 86 to 93 in the mountains and 106 to 111 in the deserts, according to NWS.

A large, south swell has raised the rip current danger risk at area beaches, meteorologists said.