Before summer officially becomes fall on Friday, autumn-like weather will make its way this week to the San Francisco and Monterey bay areas, National Weather Services officials said Monday.
Cooler and crisp air was expected to move into the area Monday with temperatures dropping further on Wednesday.
Temperatures midweek may get as low as the upper 30s in some areas with 40s expected in many areas, weather officials said.
Each cold front will bring with it breezy conditions. A light frost is possible by Thursday morning in interior hills and mountains.
Weather officials said each front may bring some slight rain to the North Bay.