Hourly Weather | Today Monday, October 6, 2025
St. Louis, Missouri
10 AM
Cloudy Weather
73°
Feels Like 75°
6
Humidity: 78%
Wind: 7 mph
UV Index: 24
11 AM
Cloudy Weather
75°
Feels Like 81°
7
Humidity: 69%
Wind: 7 mph
UV Index: 34
12 PM
Cloudy Weather
81°
Feels Like 86°
7
Humidity: 60%
Wind: 7 mph
UV Index: 42
1 PM
Cloudy Weather
82°
Feels Like 88°
11
Humidity: 54%
Wind: 7 mph
UV Index: 44
2 PM
Cloudy Weather
84°
Feels Like 88°
19
Humidity: 50%
Wind: 7 mph
UV Index: 21
3 PM
Cloudy Weather
84°
Feels Like 84°
19
Humidity: 53%
Wind: 8 mph
UV Index: 17
4 PM
Cloudy Weather
82°
Feels Like 82°
24
Humidity: 55%
Wind: 8 mph
UV Index: 12
5 PM
Cloudy Weather
81°
Feels Like 81°
47
Humidity: 57%
Wind: 8 mph
UV Index: 9
6 PM
Sunny with a Chance of Thunderstorms
79°
Feels Like 75°
51
Humidity: 64%
Wind: 8 mph
UV Index: 3
7 PM
Cloudy Night
75°
Feels Like 75°
47
Humidity: 70%
Wind: 8 mph
UV Index: 0
8 PM
Cloudy Night
73°
Feels Like 73°
47
Humidity: 79%
Wind: 8 mph
UV Index: 0
9 PM
Stormy Weather
72°
Feels Like 70°
51
Humidity: 85%
Wind: 8 mph
UV Index: 0
10 PM
Cloudy Night
72°
Feels Like 72°
47
Humidity: 89%
Wind: 8 mph
UV Index: 0
11 PM
Cloudy Night
70°
Feels Like 72°
34
Humidity: 91%
Wind: 7 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 6.52 µg/m³
  • PM10: 11.82 µg/m³
  • O₃: 28.99 ppb
  • NO₂: 7.48 ppb
  • SO₂: 1.05 ppb
  • CO: 205.55 ppb

Health Recommendations:

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

11 AM
51 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 6.52 µg/m³
  • PM10: 10.82 µg/m³
  • O₃: 36.32 ppb
  • NO₂: 6.11 ppb
  • SO₂: 1.12 ppb
  • CO: 192.91 ppb

Health Recommendations:

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

12 PM
50 AQI
Good air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 6.44 µg/m³
  • PM10: 10.10 µg/m³
  • O₃: 43.81 ppb
  • NO₂: 4.93 ppb
  • SO₂: 1.18 ppb
  • CO: 181.39 ppb

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.73 µg/m³
  • PM10: 6.05 µg/m³
  • O₃: 57.85 ppb
  • NO₂: 1.49 ppb
  • SO₂: 1.36 ppb
  • CO: 151.58 ppb

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.49 µg/m³
  • PM10: 5.85 µg/m³
  • O₃: 56.62 ppb
  • NO₂: 1.54 ppb
  • SO₂: 1.22 ppb
  • CO: 148.46 ppb

Health Recommendations:

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

3 PM
48 AQI
Good air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 5.83 µg/m³
  • PM10: 6.35 µg/m³
  • O₃: 55.38 ppb
  • NO₂: 1.59 ppb
  • SO₂: 1.08 ppb
  • CO: 145.33 ppb

Health Recommendations:

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

4 PM
47 AQI
Good air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 5.01 µg/m³
  • PM10: 5.35 µg/m³
  • O₃: 54.14 ppb
  • NO₂: 1.64 ppb
  • SO₂: 0.94 ppb
  • CO: 142.20 ppb

Health Recommendations:

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

5 PM
47 AQI
Good air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 4.79 µg/m³
  • PM10: 5.06 µg/m³
  • O₃: 48.38 ppb
  • NO₂: 3.55 ppb
  • SO₂: 0.99 ppb
  • CO: 155.95 ppb

Health Recommendations:

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

6 PM
46 AQI
Good air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 4.79 µg/m³
  • PM10: 5.00 µg/m³
  • O₃: 42.62 ppb
  • NO₂: 5.46 ppb
  • SO₂: 1.03 ppb
  • CO: 169.70 ppb

Health Recommendations:

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

7 PM
45 AQI
Good air quality Dominant pollutant: o3
Details

Pollutant Concentrations:

  • PM2.5: 5.32 µg/m³
  • PM10: 5.47 µg/m³
  • O₃: 36.86 ppb
  • NO₂: 7.37 ppb
  • SO₂: 1.08 ppb
  • CO: 183.45 ppb

Health Recommendations:

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

8 PM
45 AQI
Good air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 4.77 µg/m³
  • PM10: 4.87 µg/m³
  • O₃: 33.85 ppb
  • NO₂: 6.86 ppb
  • SO₂: 1.09 ppb
  • CO: 177.08 ppb

Health Recommendations:

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

9 PM
44 AQI
Good air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 3.64 µg/m³
  • PM10: 3.68 µg/m³
  • O₃: 30.85 ppb
  • NO₂: 6.36 ppb
  • SO₂: 1.10 ppb
  • CO: 170.71 ppb

Health Recommendations:

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

10 PM
43 AQI
Good air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 2.91 µg/m³
  • PM10: 2.94 µg/m³
  • O₃: 27.85 ppb
  • NO₂: 5.85 ppb
  • SO₂: 1.12 ppb
  • CO: 164.34 ppb

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.79 µg/m³
  • PM10: 2.82 µg/m³
  • O₃: 25.95 ppb
  • NO₂: 5.88 ppb
  • SO₂: 1.09 ppb
  • CO: 164.96 ppb

Health Recommendations:

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