Today | Weather | Wednesday, March 18, 2026
Active Weather Warnings

Weather in Las Vegas, Nevada

02:49 AM
Now
Cloudy Night
64° F
Feels Like 63°
Precipitation 0 %
Wind 7 mph
Humidity 30 %
Today
Sunny Weather
Day 95°
Night 63°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 6

Las Vegas Weather Forecast Updated

45 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (March 18, 2025)
Cloudy Weather

Day

66°

Night

43°

Wind

22 mph

UV Index

6

Precipitation

25 %

Air Quality in Las Vegas

NOW
26 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 4.51 µg/m³
PM10 19.57 µg/m³
O3 0.028 ppm
NO2 2 ppb
SO2 0.1 ppb
CO 0.09 ppm
NH3 6.28 µg/m³
NO 0 µg/m³
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide
NH3 – Ammonia
NO – Nitric oxide

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Show raw pollutant concentrations (µg/m³)
PM2.54.51 µg/m³
PM1019.57 µg/m³
O355.69 µg/m³
NO23.85 µg/m³
SO20.22 µg/m³
CO102.11 µg/m³
NH36.28 µg/m³
NO0 µg/m³

Weather Alerts and Warnings for Las Vegas

Severe Expected Likely

Extreme Heat Warning

Extreme Heat Warning issued March 17 at 8:03AM PDT until March 22 at 8:00PM PDT by NWS Las Vegas NV
Mar 18, 11:00 AM Mar 22, 8:00 PM
WHAT: Dangerously hot temperatures climbing to near-30 degrees
above seasonal normals.

WHERE: Portions of northwestern Arizona, southeastern California,
and southern Nevada.

WHEN: From 11 AM PDT / MST Wednesday to 8 PM PDT / MST Sunday.

IMPACTS: Heat-related illnesses increase significantly during
extreme heat events.

ADDITIONAL DETAILS: Extreme early-season heat coupled with high
tourism rates will make this heat very dangerous, particularly for
those not acclimated to the heat and/or traveling from cooler
climates. Numerous daily and monthly heat records are in jeopardy
through at least Sunday.
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Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take extra precautions when outside. Wear lightweight and loose-fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air-conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Monitor the latest forecasts and warnings for updates.
Updated: Mar 18, 2:04 AM Source: NWS Alert