The workweek started off warm with temperatures about 15 to 20 degrees above normal for the time of year, AccuWeather.com Meteorologist Erik Pindrock said.
A change to cooler weather began on Wednesday and will last through late week.
Temperatures only climbed into the lower and middle 60s across the area on Wednesday as cooler air from the Pacific moved inland.
Partly to mostly sunny skies will stay through the weekend with temperatures climbing into the lower and middle 60s each day.
"On Friday and into Saturday, there is a chance for some areas in the Bay Area to get a stray shower," Pindrock said. "For the weekend, temperatures will be in the mid-60s, so it will stay on the cooler side."
Pindrock said by early next week there will be a chance for temperatures to rise, but not to the highs seen earlier this week.
Thunderstorms and soaking rain will threaten Memorial Day ceremonies, cookouts and vacations for millions on Monday.
Millions of people in the central United States dealing with relentless severe thunderstorms and downpours will have to continue to weather the volatile pattern a while longer.
Tropical Depression Two has developed northeast of the Bahamas and will approach the southeastern coast of the United States with downpours, building surf and an increasing breeze during Memorial Day weekend.
Rainy weather will help to lessen the severity of the drought around Colombia and Venezuela in the coming months while drier-than-normal conditions make matters worse for the drought in Chile and northeastern Brazil.
Tropical moisture may put outdoor Memorial Day plans in jeopardy from Washington D.C., to Boston on Monday.
South East England will face rain threaten to ruin Monday's bank holiday, while the rest of the United Kingdom enjoys another mostly dry and mild day.
Chicago, IL (1992)
33 degrees on this date. Coldest for so late in the spring season.
Bracketville, TX (1880)
Twenty people drowned in a cloud burst -- 12.43" of rain.
Snowstorm; up to 10".