Nevada September Weather Alert: Las Vegas Hits 99°F Sunday, Gusty Winds Expected on I-15 Corridor

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Las Vegas, Nev. – Another hot and dry week is setting up for the Las Vegas Valley, with triple-digit heat returning Sunday and gusty winds sweeping across southern Nevada. Drivers along I-15 should brace for blowing dust in open stretches, especially south toward Primm.

According to the National Weather Service, Sunday will climb to 99°F under full sunshine, with southwest winds near 15 mph and gusts up to 20 mph. Monday follows with a high near 98°F before temperatures dip slightly into the low 90s midweek. The NOAA long-range outlook shows Nevada holding near normal for precipitation, leaving no relief from the heat in sight.

Outdoor workers, hikers, and event-goers should use caution. Extended exposure under desert sun can quickly lead to dehydration and heat exhaustion. Residents are urged to carry water, wear light clothing, and avoid peak afternoon activity where possible. Pets should not be left outdoors or walked on hot pavement, where surface temperatures soar far higher than the air.

Road conditions will remain dry, but gusty winds could stir dust across open desert highways, reducing visibility. Travelers heading between Las Vegas and California should prepare for sudden changes in crosswinds.

By late week, highs settle into the low 90s, a modest but noticeable shift toward early fall comfort. Still, sunshine remains dominant, with no measurable rain expected.


Five-Day Forecast for Las Vegas, Nevada

  • Monday: Sunny, high 98°F, gusts to 22 mph
  • Tuesday: Sunny, high 94°F, light winds
  • Wednesday: Sunny, high 91°F, mild breeze
  • Thursday: Sunny, high 90°F, warm evening
  • Friday: Sunny, high 92°F, dry conditions