Any clouds that manage to last through the morning will clear out by noon, making way for sunshine and a 3- to 5-degree warm-up. North Bay: Aside from Marin County and the highlands of Napa and Sonoma counties, most of the region will wake to mostly sunny skies. Marine clouds will slowly reclaim parts of the Pacific coast after sunset as nighttime temperatures fall to the upper 50s by the water and lower 50s inland. This will allow afternoon temperatures to reach the upper 60s across most of San Mateo County’s foothills and bay shore. Winds won’t be as strong along the San Bruno Gap - Millbrae and San Mateo - and the I-280 and Highway 101 corridor between Hillsborough and Menlo Park. An afternoon breeze off the Pacific Ocean will keep temperatures closer to 60 around Miramar and Half Moon Bay, with gusts reaching 25 mph. This means sunshine is likely to burn off a good chunk of the marine clouds and fog along Highway 1 by 11 a.m., allowing afternoon temperatures to rise to the mid-60s. Pacific Coast and Peninsula: It’s shaping up to be a little sunnier for coastal cities including Daly City and Pacifica as weather models signal less marine cloud coverage than earlier in the week. Nighttime lows are forecast to fall to the mid-50s as marine clouds curl back toward the west side and fog settles in pockets of Diamond Heights. Look for a mostly sunny sunset across downtown, Dolores Park and the Mission while a few marine clouds hold out over the western sky. Winds along the Embarcadero and Pier 39 could gust to 25 mph in the afternoon but are likely to drop off just before sunset. San Franciscans can expect widespread sunshine and light winds in the afternoon, with some partly cloudy skies lingering on the west side and Presidio.ĭaytime highs will run 2 to 3 degrees warmer than Tuesday, with highs reaching the mid-60s on the west side and upper 60s east of Sutro Tower. for most of the city, though fog might surface around Twin Peaks. San Francisco: Overcast skies are on tap through 11 a.m. That said, we’ll keep an eye on how much more of the heat infiltrates the Bay Area by the holiday weekend as the atmospheric pot over California continues to warm. The bulk of the heat will remain in the Central Valley on Wednesday and Thursday, meaning that most of the conditions that qualify as a heat wave will stay just outside the Bay Area.įor now it’s looking like temperatures in the lower 90s is about as hot as it will get in parts of the Bay Area over the next couple of days. Daytime highs could reach the lower 90s in Concord and Livermore for the first time this summer. Temperatures will then rise another 3 to 5 degrees on Thursday as the higher pressure inland shoves more of the marine clouds and fog toward San Francisco Bay. The European and American weather models suggest that temperatures Wednesday will peak in the lower 80s across the inland valleys, with a few upper 80s possible around Fairfield, Vacaville and Livermore. The clockwise motion of air from the ridge of high pressure will squeeze out of the Bay Area’s valleys by the weight of the higher pressure inland, allowing hot and dry air to set up shop in cities such as Santa Rosa and Walnut Creek on Wednesday. But it’s going to be a different story for inland residents. San Francisco and Oakland might not even notice the start of the warm-up on Wednesday cool marine air will keep most of the hot weather away from San Francisco Bay. The warming trend will take about a day or two to take off in the Bay Area.
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