Today | Weather | Thursday, September 18, 2025

Weather in Riverside, California

12:15 AM

Now

75° F

Feels Like 75°

Precipitation 34 %

Wind 4 mph

Humidity 76 %

Today

Day 88°

Night 72°

Precipitation 88 %

Wind 11

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

47 minutes ago

Last updated on September 17, 2025 11:28 PM

Weather Forecast History

Last Year's Weather on This Day (September 18, 2024)

Day

81°

Night

61°

Wind

6 mph

UV Index

Precipitation

Air quality in Riverside

NOW

62 AQI

Moderate air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 22.12 µg/m³

PM10 22.65 µg/m³

O₃ 20.63 ppb

NO₂ 24.78 ppb

SO₂ 5.88 ppb

CO 287.95 ppb

PM_2.5 – Fine particles <2.5μm

PM₁₀ – Inhalable particles <10μm

O₃ – Ozone

NO₂ – Nitrogen dioxide

SO₂ – Sulfur dioxide

CO – Carbon monoxide

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

View Hourly Air Quality Forecast