![]() Look for more widespread mid-60s in Daly City and upper 60s to lower 70s in Millbrae and the vicinity around San Francisco International Airport by the afternoon as this warm air spreads out across the Peninsula. as warm, dry air begins to chip away at the fog, raising daytime highs to the lower 60s. Pacific Coast and Peninsula: Residents along Highway 1 between Pacifica and Half Moon Bay are in for a chilly Tuesday morning as fog and cool air keep temperatures in the lower 50s. and lower 60s just before sunset.Įxpect a comfortable evening with nighttime lows that stay just above 50 degrees in downtown, SoMa and the Castro and mid-50s by the water. This cool air will quickly return temperatures to the upper 60s by 3 p.m. San Franciscans can then expect the gradual return of the sea breeze after 1 p.m., with winds reaching 15 to 20 mph while gusts by the water reach 20 to 25 mph. Look for more widespread daytime highs in the lower 70s by Tuesday afternoon as mostly sunny skies prevail across the city. Once the coastal fog clears out, expect those numbers to climb to the upper 60s. temperatures will struggle to reach the mid-50s. San Francisco: A cold, chilly start to Tuesday is on tap for residents in the outer Sunset and Richmond districts, where 7 a.m. And depending on how quickly the atmosphere’s steady stream of cool winds push this high-pressure system away, residents in the Sacramento Valley can also expect some heat relief later in the week. It’s also worth mentioning that Monday morning’s rush of cool marine clouds was more widespread than what the forecast was originally calling for, further raising the odds that Tuesday’s marine layer will hammer away at any heat that tries to rush in from the Central Valley.Īll in all, the odds are in favor of the marine layer’s winds keeping daytime temperatures in the Bay Area’s valleys from reaching the scorching levels that residents in the rest of the interior of the state can expect Tuesday afternoon. This means the system won’t have as much momentum to help spread the bulk of its heat west of Sacramento. The National Weather Service has issued a moderate heat risk for many of the inland valleys to account for some of those concerns.īut weather models are signaling that Tuesday’s high-pressure system is trending weaker than it was over the weekend. ![]() There is a slight chance that the marine layer weakens a smidge on Tuesday afternoon, leading to highs in the 80s reaching some of the hills closer to the eastern side of San Francisco Bay. The National Weather Service’s experimental heat risk forecast for Tuesday signals a moderate risk across some of the inland valleys in the North Bay, East Bay and South Bay. That said, its ability to cool things off becomes a little less certain as you head toward the inland valleys of the North Bay, East Bay and South Bay. ![]() ![]() This natural air conditioning will keep temperatures by the water closer to the upper 60s and 70s. Thankfully, however, the marine layer is looking to shave off most of Tuesday’s extreme heat around the Bay Area’s coastline. The Central Valley and Mojave could reach the 90s and low 100s on Tuesday afternoon. is signaling a significant intensification of the high-pressure system by Tuesday afternoon - roughly three standard deviations above what’s considered normal for this time of the year. The American weather model’s 500 millibar pressure map over the Western U.S. Depending on where you are in the Bay Area, Tuesday will be marked by yet another surge of hot, dry air - similar in some ways to the weather setup from this past weekend. ![]()
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