Today | Weather | Thursday, August 20, 2026
Active Weather Warnings

Weather in Henderson, Nevada

03:44 PM
Now
Cloudy Weather
111° F
Feels Like 111°
Precipitation 0 %
Wind 10 mph
UV Index (0 - 11+) 4
Humidity 14 %
Today
Hot Day
Day 111°
Night 90°
Precipitation 4 %
Wind 10 mph
UV Index (0 - 11+) 9

Warning: High UV Index Today: 9

High risk of harm from unprotected sun exposure. Take precautions: wear a hat, sunglasses, and apply sunscreen regularly if you’ll be outdoors for extended periods.

Henderson Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (August 20, 2025)
Cloudy Night

Day

109°

Night

88°

Wind

7 mph

Precipitation

0 %

Air Quality in Henderson

NOW
44 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 6.73 µg/m³
PM10 18.4 µg/m³
O3 0.048 ppm
NO2 0.2 ppb
SO2 0.1 ppb
CO 0.08 ppm
NH3 0.29 µg/m³
NO 0.03 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)
PM2.56.73 µg/m³
PM1018.4 µg/m³
O393.46 µg/m³
NO20.41 µg/m³
SO20.27 µg/m³
CO87.36 µg/m³
NH30.29 µg/m³
NO0.03 µg/m³

Weather Alerts and Warnings for Henderson

Severe Future Likely

Extreme Heat Watch

Extreme Heat Watch issued August 16 at 10:45AM PDT until August 21 at 8:00PM PDT by NWS Las Vegas NV
Aug 18, 10:00 AM Aug 21, 8:00 PM
WHAT: Dangerously hot conditions with temperatures up to 115 to
118 degrees expected through Death Valley and the Lower Colorado
River Valley, with highs between 107 to 110 degrees elsewhere.

WHERE: Portions of northwest Arizona, southeast California, and
southern Nevada.

WHEN: From Tuesday morning through Friday evening.

IMPACTS: Heat related illnesses increase significantly during
extreme heat events.
+ Read More
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. Monitor the latest forecasts and warnings for updates.
Updated: Aug 17, 1:01 AM Source: NWS Alert
Severe Expected Likely

Extreme Heat Warning

Extreme Heat Warning issued August 20 at 4:57AM PDT until August 21 at 8:00PM PDT by NWS Las Vegas NV
Aug 20, 4:57 AM Aug 21, 8:00 PM
WHAT: Dangerously hot conditions with temperatures up to 115 to
118 degrees expected through Death Valley and the lower Colorado
River Valley, with highs between 107 to 110 degrees elsewhere.

WHERE: Portions of northwest Arizona, southeast California, and
southern Nevada.

WHEN: Until 8 PM PDT /8 PM MST/ Friday.

IMPACTS: Heat-related illnesses increase significantly during
extreme heat events.
+ Read More
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: Aug 20, 2:22 PM Source: NWS Alert