Hourly Weather Forecast for Houston, Texas

Hourly Weather | Today › Saturday, September 12, 2026

Active Weather Warnings

Heat Advisory

Houston, Texas

11 AM

90°

Feels Like 104°

Humidity: 70%

UV Index: 5

Wind: 7 mph

12 PM

91°

Feels Like 106°

Humidity: 63%

UV Index: 7

Wind: 7 mph

1 PM

93°

Feels Like 108°

Humidity: 57%

UV Index: 8

Wind: 8 mph

2 PM

95°

Feels Like 108°

Humidity: 53%

UV Index: 7

Wind: 8 mph

3 PM

93°

Feels Like 106°

Humidity: 55%

UV Index: 5

Wind: 9 mph

4 PM

93°

Feels Like 102°

Humidity: 56%

UV Index: 4

Wind: 9 mph

5 PM

88°

Feels Like 97°

Humidity: 76%

UV Index: 1

Wind: 9 mph

6 PM

86°

Feels Like 91°

Humidity: 79%

UV Index: 0

Wind: 9 mph

7 PM

84°

Feels Like 91°

Humidity: 77%

UV Index: 0

Wind: 9 mph

8 PM

84°

Feels Like 93°

Humidity: 78%

UV Index: 0

Wind: 8 mph

9 PM

82°

Feels Like 90°

Humidity: 86%

UV Index: 0

Wind: 8 mph

10 PM

81°

Feels Like 91°

Humidity: 88%

UV Index: 0

Wind: 7 mph

11 PM

81°

Feels Like 91°

Humidity: 88%

UV Index: 0

Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

11 AM

17 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 2.41 µg/m³
PM₁₀: 10 µg/m³
O₃: 0.019 ppm
NO₂: 0.1 ppb
SO₂: 0.1 ppb
CO: 0.10 ppm

Health Recommendations:

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

12 PM

18 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 2.3 µg/m³
PM₁₀: 9.45 µg/m³
O₃: 0.019 ppm
NO₂: 0.1 ppb
SO₂: 0.1 ppb
CO: 0.10 ppm

Health Recommendations:

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

1 PM

17 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 2.16 µg/m³
PM₁₀: 8.88 µg/m³
O₃: 0.019 ppm
NO₂: 0.1 ppb
SO₂: 0.1 ppb
CO: 0.10 ppm

Health Recommendations:

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

2 PM

18 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 1.84 µg/m³
PM₁₀: 7.24 µg/m³
O₃: 0.019 ppm
NO₂: 0.1 ppb
SO₂: 0.1 ppb
CO: 0.10 ppm

Health Recommendations:

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

3 PM

18 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 1.59 µg/m³
PM₁₀: 6.09 µg/m³
O₃: 0.019 ppm
NO₂: 0.1 ppb
SO₂: 0.1 ppb
CO: 0.10 ppm

Health Recommendations:

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

4 PM

18 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 1.49 µg/m³
PM₁₀: 5.67 µg/m³
O₃: 0.019 ppm
NO₂: 0.1 ppb
SO₂: 0.1 ppb
CO: 0.10 ppm

Health Recommendations:

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

5 PM

17 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 1.52 µg/m³
PM₁₀: 5.7 µg/m³
O₃: 0.019 ppm
NO₂: 0.1 ppb
SO₂: 0.1 ppb
CO: 0.10 ppm

Health Recommendations:

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

6 PM

16 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 1.72 µg/m³
PM₁₀: 6.3 µg/m³
O₃: 0.018 ppm
NO₂: 0.2 ppb
SO₂: 0.1 ppb
CO: 0.10 ppm

Health Recommendations:

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

7 PM

16 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 1.84 µg/m³
PM₁₀: 6.67 µg/m³
O₃: 0.017 ppm
NO₂: 0.2 ppb
SO₂: 0.1 ppb
CO: 0.10 ppm

Health Recommendations:

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

8 PM

16 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 1.84 µg/m³
PM₁₀: 6.95 µg/m³
O₃: 0.017 ppm
NO₂: 0.2 ppb
SO₂: 0.1 ppb
CO: 0.10 ppm

Health Recommendations:

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

9 PM

16 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 1.73 µg/m³
PM₁₀: 6.91 µg/m³
O₃: 0.017 ppm
NO₂: 0.2 ppb
SO₂: 0.1 ppb
CO: 0.10 ppm

Health Recommendations:

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

10 PM

16 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 1.57 µg/m³
PM₁₀: 6.46 µg/m³
O₃: 0.017 ppm
NO₂: 0.2 ppb
SO₂: 0.1 ppb
CO: 0.10 ppm

Health Recommendations:

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

11 PM

16 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 1.4 µg/m³
PM₁₀: 5.86 µg/m³
O₃: 0.017 ppm
NO₂: 0.2 ppb
SO₂: 0.1 ppb
CO: 0.10 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 Houston

Moderate Expected Likely

Heat Advisory

Heat Advisory issued September 12 at 12:20AM CDT until September 12 at 6:00PM CDT by NWS Houston/Galveston TX

Sep 12, 12:00 PM → Sep 12, 6:00 PM

WHAT: Heat index values up to 109 expected.

WHERE: Portions of south central and southeast Texas.

WHEN: From noon today to 6 PM CDT this evening.

IMPACTS: Hot temperatures and high humidity may cause heat
illnesses.

+ Read More

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.

Updated: Sep 12, 9:29 AM Source: NWS Alert

Hourly Air Quality Forecast - AQI (US EPA)

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Weather Alerts and Warnings for Houston

Heat Advisory

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