Today | Weather | Saturday, May 16, 2026

Active Weather Warnings

Wind Advisory

Weather in Hesperia, California

04:16 PM

Now

73° F

Feels Like 73°

Precipitation 0 %

Wind 16 mph

UV Index (0 - 11+) 5

Humidity 34 %

Today

Day 73°

Night 50°

Precipitation 2 %

Wind 16 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.

Hesperia Weather Forecast Updated

56 minutes ago

Last updated on May 16, 2026 at 3:20 PM

Weather Forecast History

Last Year's Weather on This Day (May 16, 2025)

Day

77°

Night

50°

Wind

11 mph

UV Index

Precipitation

0 %

Air Quality in Hesperia

NOW

66 AQI

Moderate air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 10.4 µg/m³

PM₁₀ 23.93 µg/m³

O₃ 0.059 ppm

NO₂ 2.1 ppb

SO₂ 0.8 ppb

CO 0.14 ppm

NH₃ 0.43 µg/m³

NO 0.75 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 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)

PM_2.5 – 10.4 µg/m³

PM₁₀ – 23.93 µg/m³

O₃ – 116.21 µg/m³

NO₂ – 3.93 µg/m³

SO₂ – 2.14 µg/m³

CO – 159.64 µg/m³

NH₃ – 0.43 µg/m³

NO – 0.75 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Hesperia

Moderate Expected Likely

Wind Advisory

Wind Advisory issued May 16 at 9:51AM PDT until May 17 at 11:00PM PDT by NWS San Diego CA

May 16, 11:00 AM → May 17, 11:00 PM

WHAT: West winds 25 to 35 mph with gusts to 55 mph expected.

WHERE: Apple and Lucerne Valleys and San Bernardino County
Mountains.

WHEN: Until 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 16, 3:20 PM Source: NWS Alert