The clear, warm autumn sunshine that has bathed San Diego for several days is expected to be gone by the weekend, replaced by clouds and lower temperatures.
"We'll see increasing clouds beginning today, with partly cloudy skies throughout the weekend," National Weather Service forecaster Dan Atkin said.
Instead of coastal temperatures that ranged in the high 70s and low 80s during most of the week--a result of a weak Santa Ana condition--temperatures today are expected to decrease to the low 70s, with Saturday's high predicted not to reach any higher than 68.
The cooling trend is the result of a weak high pressure system slowly moving east, Atkin said.
"This weak high pressure will bring early morning low clouds, fog and cooler temperatures through Sunday," Atkin said.
With the lower temperatures, San Diegans can also expect humidity levels to rise some this weekend. Thursday's afternoon humidity measured 34%, which is below the average of 60% for this time of year, according to Atkin.
"Humidity levels are expected to climb to 50% to 60% today and continue to be up throughout the weekend," Atkin said.