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Southern California Braces for Sizzling Weekend: Inland Empire May Surpass 100°F, Deserts to Hit 110°F and Above

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Published on June 12, 2025
Southern California Braces for Sizzling Weekend: Inland Empire May Surpass 100°F, Deserts to Hit 110°F and AboveSource: Alen Ištoković, CC BY 3.0, via Wikimedia Commons

Southern Californians, prepare for another scorcher. As we head into the weekend, temperature forecasts suggest we're in for higher-than-usual heat, with parts of the Inland Empire possibly surpassing the 100°F mark and the low deserts breaching a sizzling 110°F. According to the National Weather Service in San Diego, this uptick in mercury is the handiwork of a stubborn high-pressure system encroaching upon the region.

For those looking for respite, the immediate forecast offers little change. "Not much change in high temperatures is expected through Friday," the National Weather Service states. Coastal dwellers can expect temperatures to hover around the 70s, while the Inland Empire may experience highs in the 80s and lower 90s. Conversely, desert regions are bracing for an intense bout of heat, anticipating peaks of 104 to 108 degrees Fahrenheit by Friday.

It's the same dry story into early next week, as high pressure maintains its grip. Sunday could see inland temperatures soar 5 to 10 degrees above the seasonal average. "High temperatures on Sunday will range from the lower 70s near the coast to the upper 80s to upper 90s for the Inland Empire with 110 to 114 for the lower deserts," according to the National Weather Service's Area Forecast Discussion. Nonetheless, a cool-down is on the horizon beginning Monday, with Tuesday temperatures returning to near averages, or even a few degrees cooler.

Fog might add an extra layer of complexity in the mornings for nighttime and early morning commuters. While the marine layer remains stable, a deep saturated layer could result in "some patchy drizzle this morning as well as some lower visibilities in fog for the mesas and other higher coastal terrain," the National Weather Service detailed. Mariners, at least, can breathe easy, with no hazardous conditions projected for the waters from today through Monday.