Cooler temperatures in the valleys and along the coast are expected through the weekend in San Diego County, according to the National Weather Service.
The milder conditions follow a heat wave that brought scorching and dangerous temperatures to parts of the region.
“A developing low-pressure system along the West Coast will bring cooling through the weekend with the greatest cooling on Friday,” the weather service said.
The marine layer will deepen and patchy drizzle is possible on Friday and Saturday. There is a chance of thunderstorms in the mountains and deserts.
Highs Friday will be 73 to 78 near the coast, around 79 inland, 80 to 83 in the
western valleys, 82 to 87 near the foothills, 77 to 87 in the mountains and around 100 in the deserts
The weather service said a slow warming will begin next week.