Hourly Weather Forecast for Fontana, California

Hourly Weather | Today › Saturday, August 29, 2026

Active Weather Warnings

Extreme Heat Warning

Fontana, California

6 PM

95°

Feels Like 91°

Humidity: 26%

UV Index: 2

Wind: 15 mph

7 PM

91°

Feels Like 90°

Humidity: 32%

UV Index: 0

Wind: 14 mph

8 PM

90°

Feels Like 86°

Humidity: 38%

UV Index: 0

Wind: 10 mph

9 PM

86°

Feels Like 84°

Humidity: 42%

UV Index: 0

Wind: 8 mph

10 PM

82°

Feels Like 81°

Humidity: 47%

UV Index: 0

Wind: 7 mph

11 PM

81°

Feels Like 79°

Humidity: 53%

UV Index: 0

Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

6 PM

41 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 9.22 µg/m³
PM₁₀: 27.05 µg/m³
O₃: 0.044 ppm
NO₂: 0.4 ppb
SO₂: 0.3 ppb
CO: 0.08 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

7 PM

40 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 7.98 µg/m³
PM₁₀: 24.55 µg/m³
O₃: 0.043 ppm
NO₂: 0.5 ppb
SO₂: 0.3 ppb
CO: 0.08 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

8 PM

38 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 6.67 µg/m³
PM₁₀: 22.28 µg/m³
O₃: 0.041 ppm
NO₂: 0.5 ppb
SO₂: 0.3 ppb
CO: 0.08 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

9 PM

38 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 5.7 µg/m³
PM₁₀: 20.57 µg/m³
O₃: 0.041 ppm
NO₂: 0.5 ppb
SO₂: 0.3 ppb
CO: 0.07 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

10 PM

38 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 5.25 µg/m³
PM₁₀: 20.2 µg/m³
O₃: 0.041 ppm
NO₂: 0.5 ppb
SO₂: 0.3 ppb
CO: 0.07 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

11 PM

38 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 5.16 µg/m³
PM₁₀: 20.78 µg/m³
O₃: 0.041 ppm
NO₂: 0.4 ppb
SO₂: 0.3 ppb
CO: 0.07 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Current Real-Time Air Quality Report

Weather Alerts and Warnings for Fontana

Severe Expected Likely

Extreme Heat Warning

Extreme Heat Warning issued August 29 at 11:40AM PDT until August 29 at 8:00PM PDT by NWS San Diego CA

Aug 29, 11:40 AM → Aug 29, 8:00 PM

WHAT: Dangerously hot conditions with temperatures 96 to 103.

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. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.

Updated: Aug 29, 4:58 PM Source: NWS Alert

Hourly Air Quality Forecast - AQI (US EPA)

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Weather Alerts and Warnings for Fontana

Extreme Heat Warning

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