Temperatures across the region have continued to hover below seasonal averages, a pattern expected to persist into early next week. According to the National Weather Service in San Francisco, the extended marine layer deepens, bringing widespread stratus and cooler weather inland.
For those seeking reprieve from high heat, now is the opportunity to enjoy the outdoors with highs in the upper 70s to 80s in the interior, which is about 5 to 10 degrees cooler than what's typical for this time of year. Coastal fog and the occasional gusts across prominent valleys are also part of the package, with gusts reaching around 25 mph. A deepened marine layer, expected at 1500-2000ft come tonight, will continue to drag the stratus inland, with coastal drizzle likely to add to overcast conditions Monday and Tuesday nights.
While the current low temperatures provide a comfortable escape from summer heat, change is on the horizon. The upper-level closed low lingering off the coast is predicted to weaken midweek, heralding a warming trend beginning Wednesday. "Upper level high pressure over the Four Corners region expands and shifts into southern California, bringing zonal flow to slight ridging over the Bay Area," reports the National Weather Service. This shift will lead to a noticeable temperature jump in the interior, where select areas may see the mercury rise into the low 100s.
With the rising temperatures, concerns around moderate HeatRisk come into play, especially for heat-sensitive populations without suitable cooling options. The hottest days are anticipated to be Thursday and Friday, offering Bay Area inhabitants a reason to start planning ways to stay cool. Although Saturday is set to bring slightly cooler weather, it will still be warm with highs largely residing in the 80s to low 90s across the interior.
