Today | Weather | Sunday, May 17, 2026

Active Weather Warnings

Weather in Lancaster, California

12:41 AM

Now

61° F

Feels Like 55°

Precipitation 35 %

Wind 15 mph

Humidity 40 %

Today

Day 79°

Night 52°

Precipitation 2 %

Wind 24 mph

UV Index (0 - 11+) 11

Warning: Strong Winds Today: 24 mph

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

16 minutes ago

Last updated on May 17, 2026 at 12:24 AM

Weather Forecast History

Last Year's Weather on This Day (May 17, 2025)

Day

66°

Night

54°

Wind

27 mph

UV Index

Precipitation

49 %

Air Quality in Lancaster

NOW

47 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 5.37 µg/m³

PM₁₀ 15.55 µg/m³

O₃ 0.051 ppm

NO₂ 1.8 ppb

SO₂ 0.7 ppb

CO 0.12 ppm

NH₃ 0.5 µg/m³

NO 0 µg/m³

PM_2.5 – 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)

PM_2.5 – 5.37 µg/m³

PM₁₀ – 15.55 µg/m³

O₃ – 99.69 µg/m³

NO₂ – 3.31 µg/m³

SO₂ – 1.91 µg/m³

CO – 141.42 µg/m³

NH₃ – 0.5 µg/m³

NO – 0 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Lancaster

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