Today | Weather | Monday, August 3, 2026

Active Weather Warnings

Extreme Heat Warning

Weather in Riverside, California

03:48 PM

Now

100° F

Feels Like 100°

Precipitation 0 %

Wind 13 mph

UV Index (0 - 11+) 5

Humidity 21 %

Today

Day 100°

Night 64°

Precipitation 0 %

Wind 7 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.

Riverside Weather Forecast Updated

11 minutes ago

Last updated on August 03, 2026 at 3:37 PM

Weather Forecast History

Last Year's Weather on This Day (August 3, 2025)

Day

93°

Night

63°

Wind

5 mph

Precipitation

25 %

Air Quality in Riverside

NOW

35 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 7.45 µg/m³

PM₁₀ 21.7 µg/m³

O₃ 0.038 ppm

NO₂ 0.1 ppb

SO₂ 0.2 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 – 7.45 µg/m³

PM₁₀ – 21.7 µg/m³

O₃ – 74.15 µg/m³

NO₂ – 0.25 µg/m³

SO₂ – 0.59 µg/m³

CO – 76.66 µg/m³

NH₃ – 0 µg/m³

NO – 0.06 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Riverside

Severe Expected Likely

Extreme Heat Warning

Extreme Heat Warning issued August 3 at 11:45AM PDT until August 3 at 8:00PM PDT by NWS San Diego CA

Aug 3, 11:45 AM → Aug 3, 8:00 PM

WHAT: Dangerously hot conditions with high temperatures in the
mid 90s to 105 expected.

WHERE: San Bernardino and Riverside County Valleys-The Inland
Empire.

WHEN: Until 8 PM PDT this 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.

Updated: Aug 3, 3:37 PM Source: NWS Alert