Today | Weather | Wednesday, July 15, 2026

Active Weather Warnings

Weather in Corona, California

01:01 PM

Now

99° F

Feels Like 106°

Precipitation 0 %

Wind 9 mph

UV Index (0 - 11+) 11

Humidity 29 %

Today

Day 104°

Night 70°

Precipitation 0 %

Wind 8 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.

Corona Weather Forecast Updated

59 minutes ago

Last updated on July 15, 2026 at 12:01 PM

Weather Forecast History

Last Year's Weather on This Day (July 15, 2025)

Day

88°

Night

59°

Wind

7 mph

UV Index

Precipitation

0 %

Air Quality in Corona

NOW

38 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 8.4 µg/m³

PM₁₀ 22.08 µg/m³

O₃ 0.041 ppm

NO₂ 0.1 ppb

SO₂ 0.3 ppb

CO 0.07 ppm

NH₃ 0 µg/m³

NO 0.06 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 – 8.4 µg/m³

PM₁₀ – 22.08 µg/m³

O₃ – 80.7 µg/m³

NO₂ – 0.27 µg/m³

SO₂ – 0.7 µg/m³

CO – 79.54 µg/m³

NH₃ – 0 µg/m³

NO – 0.06 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Corona

Severe Future Likely

Extreme Heat Watch

Extreme Heat Watch issued July 13 at 3:16AM PDT until July 16 at 8:00PM PDT by NWS San Diego CA

Jul 14, 10:00 AM → Jul 16, 8:00 PM

WHAT: Hot and humid conditions with elevated overnight
temperatures. Temperatures will be in the 90s in the mountains
below 6000 feet, 95 to 107 or more for inland valleys, and 80s
near the coast.

WHERE: Orange County Coastal Areas, Orange County Inland Areas,
Riverside County Mountains, San Bernardino County Mountains, San
Bernardino and Riverside County Valleys-The Inland Empire, San
Diego County Coastal Areas, San Diego County Mountains, San Diego
County Valleys, San Gorgonio Pass near Banning, and Santa Ana
Mountains and Foothills.

WHEN: From Tuesday morning through Thursday evening.

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

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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.

Updated: Jul 13, 9:12 AM Source: NWS Alert

Severe Expected Likely

Extreme Heat Warning

Extreme Heat Warning issued July 15 at 11:42AM PDT until July 16 at 8:00PM PDT by NWS San Diego CA

Jul 15, 11:42 AM → Jul 16, 8:00 PM

WHAT: Hot and humid conditions with elevated overnight
temperatures in the upper 60s and lower 70s. High temperatures in
the 90s for inland Orange County and in the mountains below 6000
feet, in the mid 90s to 102 in the San Diego County valleys, and
in the upper 90s to 108 for the Inland Empire expected.

WHERE: Orange County Inland Areas, Riverside County Mountains,
San Bernardino County Mountains, San Bernardino and Riverside
County Valleys-The Inland Empire, San Diego County Mountains, San
Diego County Valleys, San Gorgonio Pass near Banning, and Santa
Ana Mountains and Foothills.

WHEN: Until 8 PM PDT Thursday.

IMPACTS: Heat related illnesses increase significantly during
extreme heat events. Those spending long periods outdoors will be
at greater risk for heat health impacts.