Las Vegas to Receive Rain and Thunderstorms

A Pacific storm system will bring a surge of moisture to the Las Vegas Valley starting Wednesday.

Updated on Oct. 21, 2026 in Forecasts

Heavy rain falls over an arid desert landscape with dark, moody storm clouds obscuring distant mountains in the Las Vegas valley. — A Pacific storm system is forecast to bring significant rainfall and thunderstorms to the Las Vegas Valley beginning Wednesday through Thursday. AI Illustration. Upload story photo >

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The Las Vegas Valley is set to experience rain and potential thunderstorms as a storm system from the Pacific Ocean moves into the region. Precipitation chances will climb from 30 percent Wednesday night to 80 percent by Thursday afternoon.

Why it matters

The upcoming rain adds to an October that has already seen higher than normal precipitation levels for the area. The storm is expected to bring a noticeable shift in temperatures as the system moves through the Southwest.

The Las Vegas Valley is expected to receive less than 0.25 inches of rain during the system. This follows 1.19 inches of rain already recorded at the airport this October, compared to the normal annual average of four inches.

The details

Rainfall probabilities are forecast to rise steadily, reaching 60 percent by Thursday morning and peaking at 80 percent by Thursday afternoon. The valley will see high temperatures drop toward the low 70s as the storm clears out by Friday.

Wednesday, October 21, 2026: Rain chances begin at 30 percent.
Thursday, October 22, 2026: Storm effects intensify with an 80 percent chance of rain by afternoon.
Friday, October 23, 2026: Conditions are expected to turn dry for most of the area.

Seasonal Patterns

This week's system follows a month that has already seen 1.19 inches of rain, which is notable when compared to the record wettest October of 1.45 inches set in 2005. Such mid-autumn moisture events are significant relative to the long-term annual norm of four inches.

Residents should prepare for wet conditions and potential travel delays throughout the day on Thursday. Those living in areas prone to flash flooding should monitor local alerts, especially as parts of neighboring Arizona remain under a flood watch.

The takeaway

The arrival of this storm system marks a cooling trend for the region heading into the weekend. Residents should plan for a brief period of active weather before conditions shift back to dry on Friday.