Skies are clear and the air is a crisp 54°F at Sacramento International Airport (KSAC) as of 5:35 a.m. PDT on Saturday, May 16, 2026, but the calm look is a bit of a fake-out. Forecasters say gusty north winds and very low humidity will turn the long weekend into a high fire risk across much of the valley, so anyone planning outdoor work or weekend projects that could throw sparks may want a rethink.
Red Flag Warning Through Monday
The National Weather Service has issued a Red Flag Warning from 5 a.m. Saturday, May 16, through 8 p.m. Monday, May 18, covering much of the Sacramento and northern San Joaquin valleys. The forecast calls for north winds of 20 to 30 mph with gusts of 35 to 45 mph and locally up to 50 mph near the Delta and the western Sacramento Valley, according to the National Weather Service. Daytime humidities are expected to drop into the single digits to mid teens, and the strongest winds are expected Saturday night into Sunday. The highest threat will be along and west of the I 5 corridor, where dry fuels and crosswinds come together for a rough combo.
Afternoon Winds Pick Up
Saturday stays bright and dry with a high near 84°F, while northwest to north winds ramp up through the afternoon. Hourly forecasts show gusts into the 20s and 30s on Saturday, with even stronger gusts overnight. Temperatures dip slightly into the low 80s on Sunday, then climb again, with upper 80s on Monday and a midweek surge into the 90s. That warm up into Wednesday and Thursday raises heat concerns for outdoor workers, pets and anyone without easy access to cooling, so this is not the stretch to skip shade or water breaks.
What To Do
Skip outdoor burning and mowing, secure lightweight patio furniture and propane tanks, and avoid spark producing power tools while winds are gusty. Sacramento County is listed as “Permit Required” for residential burning on CAL FIRE's current burn status, so check local rules before any open flame and call 911 if you see smoke. If you must be outside, hydrate, plan cooler hours for strenuous activity later in the week, and watch for sudden crosswinds on exposed bridges and roadways.
