Today | Weather | Saturday, May 16, 2026
Active Weather Warnings

Weather in Lancaster, California

03:01 PM
Now
Sunny Weather
79° F
Feels Like 77°
Precipitation 0 %
Wind 29 mph
UV Index (0 - 11+) 8
Humidity 18 %
Today
Sunny Weather
Day 79°
Night 57°
Precipitation 1 %
Wind 23 mph
UV Index (0 - 11+) 11

Warning: Extreme UV Index Today: 11

Overexposure to the sun's harmful UV rays can cause sunburn and increase the risk of developing skin cancer, including melanoma. Protect yourself by wearing clothing that covers your skin, sunglasses, and a hat. Apply a broad-spectrum sunscreen with an SPF of 30 or higher every two hours, even on cloudy days. Minimize direct sun exposure during peak hours (10 AM to 4 PM) to reduce the risk.

Lancaster Weather Forecast Updated

54 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (May 16, 2025)
Cloudy Weather

Day

82°

Night

57°

Wind

14 mph

UV Index

11

Precipitation

1 %

Air Quality in Lancaster

NOW
52 AQI
Moderate air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 6.99 µg/m³
PM10 17.55 µg/m³
O3 0.055 ppm
NO2 0.2 ppb
SO2 0.3 ppb
CO 0.12 ppm
NH3 0.07 µg/m³
NO 0.06 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 acceptable; however, for some pollutants, there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.

Show raw pollutant concentrations (µg/m³)
PM2.56.99 µg/m³
PM1017.55 µg/m³
O3107.34 µg/m³
NO20.34 µg/m³
SO20.86 µg/m³
CO132.1 µg/m³
NH30.07 µg/m³
NO0.06 µg/m³

Weather Alerts and Warnings for Lancaster

Severe Expected Likely

Red Flag Warning

Red Flag Warning issued May 16 at 9:20AM PDT until May 16 at 10:00PM PDT by NWS Los Angeles/Oxnard CA
May 16, 10:00 AM May 16, 10:00 PM
...RED FLAG WARNING IN EFFECT FROM 10 AM TO 10 PM PDT SATURDAY
FOR STRONG WEST TO NORTHWEST WINDS AND LOW RELATIVE HUMIDITY FOR
THE ANTELOPE VALLEY AND ADJACENT WESTERN FOOTHILLS...

.The best overlap of strong winds and low humidities in the
Antelope Valley and adjacent foothills will be today, leading to
an increased risk of large and fast moving grass fires.

* WINDS...West to northwest 25 to 35 mph with gusts to 50 mph,
except damaging gusts up to 60 mph in the western portions of
the Antelope Valley.

* RELATIVE HUMIDITY...Falling to 10 to 20 percent by this
afternoon.

IMPACTS: Any grass fires that develop will likely spread
rapidly with extreme fire behavior, with the potential for
long range spotting and large fire growth.

ADDITIONAL DETAILS: While the best overlap of strong winds and
low humidities will likely occur during the Red Flag Warning
period, there will be an extended elevated fire threat
persisting through Sunday due to gusty winds and low to moderate
humidities.
+ Read More
A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. Use extreme caution with anything that can spark a wildfire. Residents near wildland interfaces should be prepared to evacuate if a wildfire breaks out. See readyforwildfire.org and wildfirerisk.org for information.
Updated: May 16, 2:06 PM Source: NWS Alert
Severe Expected Likely

High Wind Warning

High Wind Warning issued May 16 at 12:17AM PDT until May 17 at 11:00PM PDT by NWS Los Angeles/Oxnard CA
May 16, 12:17 AM May 17, 11:00 PM
WHAT: West winds 25 to 40 mph with gusts up to 60 mph expected.

WHERE: Antelope Valley and Western Antelope Valley Foothills.

WHEN: Until 11 PM PDT Sunday.

IMPACTS: Damaging winds could blow down trees and power lines.
Widespread power outages are possible. Travel will be difficult,
especially for high profile vehicles.

ADDITIONAL DETAILS: Wind speeds may drop well below warning
levels at times during the daytime hours.
+ Read More
Remain in the lower levels of your home during the windstorm, and avoid windows. Watch for falling debris and tree limbs. Use caution if you must drive.
Updated: May 16, 2:06 PM Source: NWS Alert
Moderate Expected Likely

Wind Advisory

Wind Advisory issued May 15 at 4:16AM PDT until May 17 at 11:00PM PDT by NWS Los Angeles/Oxnard CA
May 15, 9:00 PM May 17, 11:00 PM
WHAT: West to northwest winds 25 to 35 mph with gusts up to 50
mph expected.

WHERE: Antelope Valley and Western Antelope Valley Foothills.

WHEN: From 9 PM this evening to 11 PM PDT Sunday.

IMPACTS: Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.
+ Read More
Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution.
Updated: May 15, 10:44 AM Source: NWS Alert