By admin After a cool weekend, and even some brief evening rain for parts of the Central Valley including Sacramento late Sunday, the Golden State is set to bounce back with above-average temperatures as October fast approaches.
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On Monday, with an upper atmospheric trough of low pressure still overhead California, inland temperatures will hold below average, with high temps across the Central Valley from Sacramento staying in the low 80s despite mostly sunny skies.
As winds quickly shift out of the north Monday, that change will squeeze air above the Sierra together and produce scattered showers through the day. The risk for lightning remains low, but fires that do start could spread quickly — winds will be gusting 30 mph or more Monday afternoon out of the north.
As our lower pressure departs eastward — caught up with a racing Hurricane Polo — the upper atmospheric pattern will change dramatically. The merging of Hurricane Polo with the jet stream over the continental United States will inject many atomic bombs worth of energy into the atmosphere in short order. The result is a greatly amplified pattern, with California on the hot end of it.
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By Tuesday and Wednesday, high temps across much of the Central Valley will be in the 90s. Closer to the weekend, the high pressure ridge is likely to build substantially over Southern California, with 100-degree or higher temps expected for places like Bakersfield and San Bernardino.
Hurricane Polo set to impact Baja California, southwestern U.S.
As of 1 a.m. Monday, Hurricane Polo was a Category 3 hurricane with maximum winds of 115 mph. The former Category 5 storm will make headlines Monday afternoon or evening as the first landfalling hurricane of the year (including the Atlantic Ocean). Polo will come ashore Baja California Sur north of Cabo San Lucas with intense wind, rain and storm surge.
After a second landfall late tonight once it passes over the Gulf of California, Polo will rapidly weaken as it is absorbed by the trough that has kept California cooler this weekend. Together, they will race to the northeast, gushing the southwestern United States with tropical rains. Portions of Arizona and New Mexico could see up to 4 inches of rain fall quickly.
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This story was originally published September 28, 2026 at 7:01 AM.