Heat stress in Las Vegas
Bone-dry Mojave heat with intense sun load — air temperatures soar even when humidity stays low.
Light precautions for intense activity. Keep water handy.
Live wet-bulb globe temperature via the Liljegren (2008) method · automatically refreshed about every 30 minutes.
View Las Vegas on the live mapReading heat stress in Las Vegas
Wet-bulb globe temperature (WBGT) is the heat measure that actually tracks danger to the body. Unlike the plain air temperature on your phone, it folds in humidity, wind, and direct sun — the factors that decide whether your sweat can still cool you. It’s the standard the military, athletic associations, and occupational-safety bodies use to call when outdoor activity is no longer safe.
That matters in Las Vegas because bone-dry Mojave heat with intense sun load — air temperatures soar even when humidity stays low. The number above is the live outdoor WBGT for the city right now; tap through to the live map to inspect any neighborhood, scrub the forecast hour by hour, and see the 7-day outlook.
Heat in Las Vegas: common questions
What is the WBGT in Las Vegas right now?
Right now it's about 63°F WBGT (safe heat stress). This page shows the live wet-bulb globe temperature for Las Vegas, Nevada, refreshed automatically about every 30 minutes. Open the live map for an exact reading at your neighborhood and an hour-by-hour forecast.
Why is WBGT more useful than the temperature for Las Vegas?
Air temperature ignores humidity, wind, and sun — the things that decide whether heat is dangerous. Las Vegas's climate (bone-dry Mojave heat with intense sun load — air temperatures soar even when humidity stays low.) is exactly why a single "feels-like" or thermometer reading can understate the real risk. WBGT captures all of it in one number.
When is heat most dangerous in Las Vegas?
Heat stress typically peaks in the early-to-mid afternoon, when sun load is highest. Plan strenuous outdoor activity for early morning or evening, hydrate ahead of time, and use the forecast scrubber on the live map to find the safest window.
Is WetBulbTracker free to use for Las Vegas?
Yes. WetBulbTracker is free, needs no account, and works for anywhere on Earth — not just Las Vegas. You can install it to your home screen and even set heat alerts.