As the week progresses, San Diego and its surrounding counties are bracing for a mix of sunny skies and impending rainfall. NWS San Diego notes a warming trend starting today and running through Thursday, with temperatures for coastal areas reaching up to 73 degrees Fahrenheit and inland valleys heating up to 70 to 76 degrees. The mountain regions and high deserts are expected to experience a more significant warmth surge, potentially climbing locally to 10 degrees warmer than the previous coolness.