Hourly Weather | Today | Tuesday, August 26, 2025
St. Louis, Missouri
1 PM
Sunny WeatherSunny weather, clear skies and sunny weather.
75°
Feels Like 82°
0
Humidity: 41%
Wind: 8 mph
UV Index: 79
2 PM
Sunny WeatherSunny weather, clear skies and sunny weather.
77°
Feels Like 82°
0
Humidity: 36%
Wind: 8 mph
UV Index: 71
3 PM
Sunny WeatherSunny weather, clear skies and sunny weather.
79°
Feels Like 82°
0
Humidity: 34%
Wind: 8 mph
UV Index: 52
4 PM
Sunny WeatherSunny weather, clear skies and sunny weather.
79°
Feels Like 81°
0
Humidity: 34%
Wind: 8 mph
UV Index: 39
5 PM
Sunny WeatherSunny weather, clear skies and sunny weather.
77°
Feels Like 77°
0
Humidity: 36%
Wind: 8 mph
UV Index: 25
6 PM
Sunny WeatherSunny weather, clear skies and sunny weather.
75°
Feels Like 75°
0
Humidity: 39%
Wind: 8 mph
UV Index: 15
7 PM
Sunny WeatherSunny weather, clear skies and sunny weather.
73°
Feels Like 72°
0
Humidity: 44%
Wind: 7 mph
UV Index: 5
8 PM
NightNighttime, with dark skies and stars or a moon visible.
70°
Feels Like 66°
0
Humidity: 54%
Wind: 7 mph
UV Index: 0
9 PM
NightNighttime, with dark skies and stars or a moon visible.
66°
Feels Like 64°
0
Humidity: 61%
Wind: 6 mph
UV Index: 0
10 PM
NightNighttime, with dark skies and stars or a moon visible.
63°
Feels Like 63°
0
Humidity: 68%
Wind: 6 mph
UV Index: 0
11 PM
NightNighttime, with dark skies and stars or a moon visible.
61°
Feels Like 61°
0
Humidity: 75%
Wind: 5 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

1 PM
51 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 8.93 µg/m³
  • PM10: 33.78 µg/m³
  • O₃: 35.22 ppb
  • NO₂: 9.84 ppb
  • SO₂: 0.64 ppb
  • CO: 310.24 ppb

Health Recommendations:

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

2 PM
51 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 8.08 µg/m³
  • PM10: 24.70 µg/m³
  • O₃: 43.42 ppb
  • NO₂: 6.90 ppb
  • SO₂: 0.74 ppb
  • CO: 257.10 ppb

Health Recommendations:

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

3 PM
51 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 7.42 µg/m³
  • PM10: 19.92 µg/m³
  • O₃: 48.00 ppb
  • NO₂: 5.44 ppb
  • SO₂: 0.78 ppb
  • CO: 230.21 ppb

Health Recommendations:

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

4 PM
51 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 6.86 µg/m³
  • PM10: 16.88 µg/m³
  • O₃: 51.14 ppb
  • NO₂: 4.57 ppb
  • SO₂: 0.79 ppb
  • CO: 213.81 ppb

Health Recommendations:

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

5 PM
51 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 6.27 µg/m³
  • PM10: 14.62 µg/m³
  • O₃: 49.88 ppb
  • NO₂: 4.67 ppb
  • SO₂: 0.78 ppb
  • CO: 208.64 ppb

Health Recommendations:

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

6 PM
51 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 4.89 µg/m³
  • PM10: 4.99 µg/m³
  • O₃: 53.90 ppb
  • NO₂: 2.70 ppb
  • SO₂: 0.83 ppb
  • CO: 163.21 ppb

Health Recommendations:

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

7 PM
51 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 4.82 µg/m³
  • PM10: 4.90 µg/m³
  • O₃: 50.46 ppb
  • NO₂: 3.53 ppb
  • SO₂: 0.79 ppb
  • CO: 169.73 ppb

Health Recommendations:

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

8 PM
51 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 6.02 µg/m³
  • PM10: 6.09 µg/m³
  • O₃: 43.35 ppb
  • NO₂: 6.39 ppb
  • SO₂: 0.82 ppb
  • CO: 192.84 ppb

Health Recommendations:

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

9 PM
51 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 6.72 µg/m³
  • PM10: 6.79 µg/m³
  • O₃: 36.23 ppb
  • NO₂: 9.25 ppb
  • SO₂: 0.84 ppb
  • CO: 215.96 ppb

Health Recommendations:

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

10 PM
51 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 7.15 µg/m³
  • PM10: 7.21 µg/m³
  • O₃: 29.12 ppb
  • NO₂: 12.11 ppb
  • SO₂: 0.87 ppb
  • CO: 239.07 ppb

Health Recommendations:

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

11 PM
49 AQI
Good air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 7.85 µg/m³
  • PM10: 7.91 µg/m³
  • O₃: 25.49 ppb
  • NO₂: 14.54 ppb
  • SO₂: 0.94 ppb
  • CO: 256.96 ppb

Health Recommendations:

With this level of air quality, you have no limitations. Enjoy the outdoors