Today | Weather | Wednesday, October 1, 2025

Weather in Fontana, California

10:05 AM

Now

66° F

Feels Like 72°

Precipitation 0 %

Wind 4 mph

UV Index (0 - 11+) 11

Humidity 70 %

Today

Day 82°

Night 59°

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.

Fontana Weather Forecast Updated

19 minutes ago

Last updated on October 01, 2025 9:46 AM

Weather Forecast History

Last Year's Weather on This Day (October 1, 2024)

Day

100°

Night

66°

Wind

4 mph

Precipitation

Air quality in Fontana

NOW

67 AQI

Moderate air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 13.22 µg/m³

PM10 13.84 µg/m³

O₃ 35.87 ppb

NO₂ 10.56 ppb

SO₂ 3.01 ppb

CO 228.21 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