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San Francisco Sizzles as a Winter Heat Wave Grips the West

San Francisco's March heat reached record highs with 90°F in Redwood City and 85°F in San Jose, marking the hottest March in at least 20 years amid a rare West-wide winter heat wave.

  • On Tuesday, San Francisco recorded its hottest March in at least 20 years as records across the Bay Area toppled Monday, with Redwood City reaching 90 F.
  • Amid the heat wave, the National Weather Service says the U.S. West, including Phoenix and Las Vegas, faces regional temperature surges with highs reaching over 100 F and nearly 90 F in parts of the Bay Area.
  • Locals reported that San Francisco International Airport hit 83 F Monday while Redwood City reached 90 F and San Jose tied a record at 85 F, breaking local records.
  • Authorities warned against strenuous hiking in Grand Canyon National Park from 10 a.m. to 4 p.m. through Sunday, while Colorado utilities limit lawn watering due to low snowpack affecting Aurora Water's 400,000 customers.
  • Looking ahead, forecasters project Las Vegas could reach between 94 and 98 F with a chance of 100 F Saturday, while Grand Canyon Village and Phantom Ranch may hit 96 to 104 F and Phoenix could top 100 F by March 26.
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San Francisco sizzles as a winter heat wave grips the West

A rare March heat wave is pushing San Francisco close to 90 degrees and setting records across the West.

·United States
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The inhabitants of San Francisco showed an unusual amount of skin for this time of year this Tuesday, while a city, best known for its fresh summers, drizzle and fog, experiences its hottest March in at least two decades; a phenomenon that is part of an unusual winter heat wave that is suffocating the west of the United States. While the Bay Area flirts with peaks close to 90 degrees Fahrenheit (32.2 °C), Phoenix is expected to exceed 100 °F (37…

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kctv5 broke the news in on Tuesday, March 17, 2026.
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