Las Vegas/ Weather & Environment

Las Vegas Forecast Turns Unsettled After Mild Sunday and Monday

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Published on October 18, 2026
Las Vegas Forecast Turns Unsettled After Mild Sunday and MondaySource: Google Street View

Las Vegas is expected to have its best stretch for outdoor plans Sunday and Monday, before rain chances return midweek. The National Weather Service forecast calls for a high near 79 Sunday and about 81 Monday, then a more unsettled outlook from Tuesday into Thursday.

A mild start, with rain chances later

Clouds around dawn Sunday are expected to thin, with possible light rain and light winds during the day. Sunday night is forecast to be mostly clear, with a low near 64. Monday is expected to be sunny.

The forecast introduces a slight chance of showers and thunderstorms Tuesday evening, followed by a chance of showers and thunderstorms Wednesday and showers Thursday. Thursday’s high is forecast near 69. The supplied outlook calls for sunny weather Friday, also near 69, but later-week details can shift; check the current NWS forecast before making plans.

Past extreme rainfall is a separate event

A historical example underscores why rainfall records should not be mistaken for a forecast: the National Hurricane Center reported that Death Valley recorded 2.20 inches on Aug. 20, 2023, during the separate Hurricane Hilary event, setting its all-time daily rainfall record. That occurred in Death Valley during a different storm and does not establish expected rainfall or impacts in Las Vegas this week. The current outlook describes chances of precipitation, not a specific rainfall total.

As general advice—not an indication that flooding is forecast—Clark County Fire Department says never to drive through any amount of floodwater. Sunday and Monday remain the clearest windows in the supplied outlook for outdoor plans; conditions later in the week warrant checking again.