A high-pressure system will bring increasing temperatures to the San Diego region’s inland valleys and excessive heat to the Anza-Borrego Desert.
The National Weather Service office in San Diego is forecasting a high of close to 110 for Monday and and between 110 and 114 on Tuesday and Wednesday for the county deserts. An excessive heat watch will be in effect starting Tuesday.
The inland valleys will see highs that are 10 to 15 degrees above normal during the period before a gradual cooling begins by Thursday.
“Strong high pressure will bring very hot inland weather today through Wednesday,” the weather service said. “Coastal areas will remain cooler with some low clouds and fog during the nights and mornings.”
Highs along the coast Monday will be 70 to 75, rising to 80 to 85 immediately inland and into the 90s in the foothills.