A cooldown begins across the Bay Area today, with temperatures expected to drop between 3 and 5 degrees below Sunday’s high. The cooling trend is expected to continue Tuesday through Wednesday, with seasonal average temperatures of 60 degrees Celsius on the coast and 80 degrees Celsius inland. However, the pendulum swings later in the week and is expected to warm again by Friday.
US weather models predict that a high pressure system will move eastward over the southwestern desert this week.
weather bellThe high pressure system that heated California from Redding to Death Valley over the weekend moves east, exposing the Bay Area to cooler sea air for the first half of the week.
Monday will be 3-5 degrees cooler than Sunday, Tuesday will be 5-10 degrees cooler, and Wednesday will stabilize.
The Bay Area will see some easing this week, but neighboring Arizona isn’t so lucky. Phoenix is ​​set to experience the hottest month on record. Since July 1, Phoenix has exceeded 110 degrees every day and is expected to remain so for the next 10 days.
High pressure is expected to return over Southern California by Friday, reintroducing about 90 degrees of pressure over the interior of the Bay Area.
Hot days continue in July
Above-average temperatures are expected to continue until the end of July, according to the Climate Prediction Center. The CPC projects a 60% to 80% chance of above-average temperatures across the Bay Area from July 22-26.
The Center for Climate Prediction predicts that above-normal temperatures are likely to continue across the Bay Area next weekend.
Vital Weather/Climate Prediction CenterFor the final week of the month, the CPC also forecasts a greater than 50% chance of above-normal temperatures from July 24-30.
The Center for Climate Prediction projects a greater than 50% chance of warmer-than-normal temperatures across California in the last week of July.
Vital Weather/Climate Prediction CenterThe heat of the 1990s and 100s is likely to continue through the end of the month inland, but weather models do not predict September-like heatwaves will reach the coast anytime soon. For now, inland residents looking to beat the heat have plenty of coastal and coastal options.
Monday breakdown
San Francisco: The anticyclone will linger long enough that residents east of Sutro Tower will see mostly clear, warm days again. Temperatures will reach highs in the low 70s before 2pm in Downtown, South Market and the Mission District.
Light fog is expected to persist throughout the day in the Presidio, Richmond and Sunset areas, with temperatures in the low 60s along the coast and mid 60s a few miles inland.
Fog is expected to return across the city overnight, with minimum temperatures in the mid-50s.
Pacific Coast and Peninsula: Along Highway 1, there may be a little bit of sunshine, but clouds and fog will probably be thicker in the evening than in the morning. In Daly City, Pacifica, El Granada and Half Moon Bay, land breezes will bring temperatures down a few degrees from Sunday to the low 60s.
San Bruno, San Mateo, and Redwood City will mostly be sunny, but there will be some coolness. Temperatures increase as you travel south, reaching high 60s in South San Francisco and low 80s in Palo Alto. Nighttime lows will be in the mid-50s throughout San Mateo County.
North Bay: Early risers could see lightning strikes north of Sonoma, Napa, and Solano counties. But most North Bay residents wake up to quiet mornings and mostly clear skies.
Temperatures on Monday will be about 3-5 degrees cooler than the weekend, with mid to high 80s in San Rafael, Petaluma and Napa, and over 90s in Santa Rosa. Mount Tamalpais will finally get a little cooler on Monday as the sea air pushes away the high altitude heat.
Low pressure across the North Bay will drop to the high 50s overnight, and fog can return to the Petaluma, Santa Rosa and Napa valleys.
East Bay: Temperatures will remain unseasonably warm on Monday, with temperatures dropping about 3-5 degrees across the East Bay. Expect mid to late 90’s in Walnut Creek, Dublin and Livermore, mid 70’s in Richmond, Auckland and Berkeley. The sky will be mostly clear.
Light breezes could push some oceanic clouds over the bay into Richmond, Berkeley and the Delta by evening. Nighttime temperatures drop to the mid-50s.
South Bay and Santa Cruz: The skies in the Santa Clara Valley should be clear from the start. Temperatures in the San Jose metropolitan area will be about 5 degrees cooler than Sunday, reaching mid to high 80s.
Clouds in the morning in Santa Cruz will recede by noon and the afternoon will be mostly clear with temperatures in the mid to high 60s along the coast.
Overnight clouds will increase, with minimum temperatures in the high 50s inland and mid 50s on the coast.
Please contact Anthony Edwards: anthony.edwards@sfchronicle.com
