Las Vegas/ Weather & Environment

Sin City Sizzles Saturday, Then Stormy Sunday Brings Cooldown

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Published on September 05, 2026
Sin City Sizzles Saturday, Then Stormy Sunday Brings CooldownSource: Google Street View

Las Vegas starts Saturday clear and around 75 degrees, but the valley will heat up to near 98 under sunny skies. South winds will build through the day, with gusts up to 28 mph, before the forecast takes a sharp turn Sunday.

Saturday Is Hot, Sunny And Windy

The latest outlook from the National Weather Service in Las Vegas calls for a mostly dry Saturday, though a slight chance of rain could arrive late Saturday night or early Sunday. Afternoon winds are expected to run from 3 to 20 mph, and the very dry air will make hydration and shade especially important for anyone spending the day outside.

Temperatures should climb through the 80s during the morning and reach the mid- to upper 90s by afternoon. The wind will add a little desert drama to outdoor plans, with gusts strong enough to kick up dust or send unsecured patio items on a short trip.

Sunday Brings The Main Weather Change

Sunday will be noticeably cooler, with a high near 86 and a 60% chance of rain. Showers are possible before 11 a.m., while showers and thunderstorms are most likely from roughly 11 a.m. to 4 p.m., followed by a smaller storm chance late in the afternoon.

Forecasters expect the western Mojave Desert and Spring Mountains to have the best chance of meaningful rainfall, while terrain around the Las Vegas Valley could limit totals. Even so, heavier downpours may cause roadway ponding, minor flooding and quick responses in the valley's usual flashy drainage areas.

The shift is a substantial update from Friday's breezy, mostly dry setup detailed in Hoodline's earlier forecast. Anyone with Sunday outdoor plans should keep an eye on changing skies, lightning and sudden wind shifts rather than assuming the cooler temperature means calmer conditions.

Labor Day Dries Out Before Heat Returns

Sunday night turns mostly cloudy and cools to around 72 degrees, followed by a sunny Labor Day with a high near 93. The break will be brief: temperatures rebound to about 97 Tuesday, 100 Wednesday and 101 Thursday and Friday, with slight storm chances returning late in the week.