Las Vegas is waking up to a mixed bag of water news and weather quirks this weekend. Starting with how things stand today, the valley is basking under clear skies and cool temperatures after an unusually mild stretch for late September. According to Weather25, Las Vegas is seeing average highs around 30 to 34 degrees Celsius, or about 86 to 93 degrees Fahrenheit, with nighttime lows dipping into the upper 60s to near 70. For those heading outdoors, bring water—hydration is still key, even as the summer heat finally lets up.

When it comes to rain, Clark County continues its almost legendary dry run. Weather data shows September averages fewer than two rainy days, and over the past 48 hours, precipitation has been negligible, with most neighborhoods recording zero measurable rainfall. This lines up with a broader September trend—by late month, Las Vegas frequently registers below-average rainfall, and this year is no exception. Just a fraction of a millimeter of rain fell on Friday, barely enough to dampen the sidewalks.

Groundwater, however, is the concern humming beneath the surface. The Las Vegas Review-Journal highlights a major new study from Arizona State University showing that water equivalent to Lake Mead has vanished from underground in our regional basin between 2002 and 2024. That equates to nearly 28 million acre-feet—a massive loss, roughly twice as fast as the drop in Lake Mead’s surface water. Researchers like Jay Famiglietti are raising red flags. They emphasize that groundwater is a transgenerational resource, and its depletion makes every drop from above, whether rain or snowmelt, that much more precious.

Surface water users are feeling the pressure too. The Bureau of Reclamation’s August 2025 report confirms that Lake Mead remains at Level 1 Shortage. Water levels are predicted to drop to 1,055.88 feet by early next year. That’s bad news for Nevada’s supply: the state is set to lose 21,000 acre-feet of its usual Colorado River allocation—a 7 percent cut. It’s not just Nevada feeling the strain. Arizona is facing an even larger reduction, with Mexico also seeing smaller cuts. With nearly 40 million people across the West relying on Colorado River water, there’s increasing urgency in the ongoing interstate negotiations to rewrite the rules by 2027.

Local officials are keeping a close eye on groundwater systems, especially in rural and outlying corners of the valley. In town, most Las Vegas residents are protected by near-constant monitoring of both surface and ground supplies, and Southern Nevada Water Authority reminds everyone that conservation remains the name of the game. Many outdoor water uses are still subject to restrictions, and the community continues to shine as a leader in using tech and policy to stretch every gallon.

As for your glass at home, the city’s drinking water continues to meet federal and state safety standards. Even with supply cuts looming and the groundwater situation under review, officials stress that water quality in the Las Vegas Valley remains high, routinely tested for contaminants and safe for daily use. Still, the message from water experts is clear: what’s on tap today comes from delicate systems that demand care and attention.

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