The Excessive Heat Warning for San Diego deserts continues until 8 p.m. Sunday. The heat gets stronger farther east, with a more than 50º temperature difference observed between the coast and the deserts Saturday.
Sunday, temperatures start to cool a degree or two, but the real cooling kicks in Monday.
Sunday, daytime highs will peak in the 110-116º range. Inland valleys and mountains will stay well above average through the weekend as well, with highs getting up to the upper 80s and lower 90s in those regions. The coast will be the spot to escape the heat, with temperatures only a few degrees warmer than average, getting up into the low to near mid-70s through the weekend.
A bit of a monsoon pattern is setting itself up. It doesn't look like rain is likely in San Diego County, but large clouds could build over the mountains.
A cooling trend kicks in Monday and Tuesday, dropping temperatures back down closer to normal for most regions, but then highs kick right back up starting about Wednesday, peaking Friday. Moral of the story: heat is here to stay.
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