Unseasonably Hot March Engulfs San Francisco in a Winter Heat Wave

Wed Mar 18 2026 00:59:55 GMT+0000 (Coordinated Universal Time)

Residents of San Francisco bask in near-summer temperatures during an uncharacteristically warm March, breaking records while other parts of the U.S. struggle with extreme weather.

San Francisco experiences its hottest March in two decades, with temperatures soaring to 90°F (32.2°C) amidst a winter heat wave afflicting the U.S. West. While locals enjoy the unusual warmth, the Midwest grapples with severe snowstorms causing flight disruptions. Phoenix and Las Vegas prepare for record-breaking highs as the country faces contrasting weather extremes.

SAN FRANCISCO (AP) — Residents of San Francisco are enjoying a surprising early taste of summer as the city endures its hottest March in over 20 years, with temperatures reaching nearly 90°F (32.2°C) this week. This heat wave is affecting the entire U.S. West Coast, as cities like Phoenix are predicted to break 100°F (37.7°C) for the first time before the end of March.

Meanwhile, the Midwest and eastern regions are recovering from relentless snowstorms that resulted in thousands of flight cancellations. Canines and their owners flocked to Crissy Field, excitedly taking advantage of the warm weather.

“It feels like summer already in March. That’s crazy, but I love it,” exclaimed Justyce Roliz, a dog walker. “The dogs, they love running in the water and cooling off.”

Even as locals embrace the warm temperatures, some are finding it challenging. Jessica Ling expressed delight at the unexpected warmth but noted the struggle of coping without air conditioning in her home.

With temperatures in San Francisco International Airport reported at 83°F (28.3°C) Monday, the warmth is creating a contrast with much of the rest of the country, where residents are digging out from snow. Record highs are also expected across the Bay Area, with Redwood City topping out at 90°F and San Jose reaching 85°F.

As Las Vegas anticipates triple-digit heat by this weekend, meteorologists are advising visitors to hydrate accordingly. This heat wave could reshape vacation plans for many in the region, especially those visiting from cooler climates.

Park officials in Arizona are also on alert, issuing extreme heat warnings for Grand Canyon National Park, urging visitors to avoid strenuous activities during peak temperatures between 10 a.m. and 4 p.m.

In contrast, areas in Colorado are concerned about the implications of early heat on water supplies due to an extraordinarily warm winter. Local water utility companies are advising residents against turning on their sprinklers too soon.

The unusual weather pattern has drawn mixed reactions from residents across the nation, illustrating the stark contrasts in climate being experienced across the U.S. this spring.