Las Vegas weather: Mario, Priscilla cut rainfall deficit

For much of this year, the rainfall situation was looking bleak in the Las Vegas Valley.

By mid-September, Harry Reid International Airport had recorded only about 2 inches of rain, nearly an inch below normal.

The valley had endured a relatively monsoon-free summer, which followed a dry spring and winter. And the autumn months have a reputation for being dry in Southern Nevada.

But the script flipped when two tropical storms arrived this fall, putting a major dent in the deficit.

Thanks to Mario and Priscilla, the airport has recorded 3.32 inches of rain so far in 2025, only 0.14 inches below the normal of 3.46. An average calendar year is 4.19 inches.

How it happened

— On Oct. 10, heavy rains from the remnants of Tropical Storm Priscilla pounded the valley. The airport registered 0