Skies Will Be Cloudy All Day

High cloudiness and some patchy fog along the coast should be the worst the weather gets in Southern California through the weekend, forecasters said Thursday.

Although an approaching upper-level trough will deepen the marine layer and bring slightly cooler weather today and Saturday, the National Weather Service said no rain is expected “at least through the first of next week.”

Meteorologist Pat Cooper of WeatherData, which provides forecasts to The Times, said there was a “very slight chance of drizzle” today and Saturday, but she did not expect it to materialize. “It all depends on how deep that marine layer gets,” she said.

She said that after Saturday, when onshore winds will give way to breezes coming from inland, “it should warm up just a little.” Monday and Tuesday, she added, should be sunny and warmer.

The National Weather Service said Los Angeles’ high temperatures should be in the low 60s today and in the upper 50s on Saturday. Southland readings should range from 58 to 73 Sunday through Tuesday.

Thursday’s Civic Center high was 66 degrees after an overnight low of 43. The high relative humidity was 80% and the low was 33%.

The mountains and deserts will have the same high cloudiness, with high temperatures at the mountain resorts of 44 to 50 today and 36 to 46 on Saturday. Maximum readings in the high deserts should be 58 to 66 today, 52 to 62 on Saturday. In the lower deserts, the highs will be 68 to 75 today and 64 to 70 on Saturday.

The surf is expected ot be 2 feet along Santa Barbara, Ventura and Los Angeles County beaches and 3 feet along the Orange and San Diego County shorelines.