Bay Area residents should keep those coats and gloves handy for the next week at least, as temperatures are likely to drop even further and remain chilly through Dec. 11, a National Weather Service forecaster said.
"Temperatures really dipped (Tuesday) afternoon and early evening, and there were very cool temperatures this morning, but that's not as cold as it will get," forecaster Bob Benjamin said Wednesday.
Downtown Danville saw temperatures reach about 40 degrees by noon Wednesday, with a forecast high of 49 degrees, according to the NWS. Nighttime conditions in the town are expected to fluctuate between the high 20s and low 30s throughout the next week.
An air mass settling in will cause cooler temperatures into Thursday morning. Wind throughout the Bay Area is expected to decrease.
A freeze warning was set to go into effect Wednesday night at 9 p.m., and it will last through 9 a.m. Thursday morning, Benjamin said.
Residents are advised to protect plants -- especially citrus and other fragile plants -- by covering them or moving small plants indoors. The same goes for exposed pipes, Benjamin said. Covering pipes with insulation, towels or blankets can prevent the cold temperatures from freezing the pipes.
With rainfall projected in Danville and other parts of the Bay Area on Friday, Benjamin said roadways will likely be slick, and white caps may be seen in the region's higher elevations.
"Most hilltops in the Bay Area will probably have some snow -- people waking up Saturday morning might be able to see white caps, even snow above 1,500 feet," Benjamin said.
Temperatures are expected to stay below average during the rainy weekend, and won't start to come back up to near normal until next Tuesday or Wednesday, Benjamin said.