Temperatures in the Bay Area rise during the Month of March A heat wave caused by a high-pressure “heat dome” trapping warm air in the atmosphere swept across the Bay Area and pushed record temperatures of 15-30 degrees above normal , from March 16 to 20, raising concerns about public health and resources. Temperatures have been recorded to break records in the month of March, hitting averages in the 80s along the coast and upper 80s to mid-90s inland, according to the Natio