Hourly Weather | Today Wednesday, March 18, 2026
St. Joseph, Missouri
6 AM
Cloudy Night
27°
Feels Like 27°
20
Frost Risk: 98%
Humidity: 90%
UV Index: 0
Wind: 4 mph
7 AM
Cloudy Night
28°
Feels Like 28°
13
Frost Risk: 88%
Humidity: 86%
UV Index: 0
Wind: 4 mph
8 AM
Cloudy Weather
30°
Feels Like 34°
0
Humidity: 85%
UV Index: 1
Wind: 2 mph
9 AM
Cloudy Weather
34°
Feels Like 39°
0
Humidity: 80%
UV Index: 2
Wind: 2 mph
10 AM
Cloudy Weather
39°
Feels Like 46°
0
Humidity: 68%
UV Index: 3
Wind: 4 mph
11 AM
Cloudy Weather
46°
Feels Like 55°
0
Humidity: 59%
UV Index: 4
Wind: 4 mph
12 PM
Cloudy Weather
54°
Feels Like 63°
0
Humidity: 53%
UV Index: 5
Wind: 5 mph
1 PM
Cloudy Weather
57°
Feels Like 66°
0
Humidity: 50%
UV Index: 5
Wind: 5 mph
2 PM
Cloudy Weather
61°
Feels Like 68°
0
Humidity: 46%
UV Index: 5
Wind: 6 mph
3 PM
Cloudy Weather
64°
Feels Like 70°
0
Humidity: 44%
UV Index: 4
Wind: 6 mph
4 PM
Cloudy Weather
66°
Feels Like 70°
0
Humidity: 43%
UV Index: 3
Wind: 7 mph
5 PM
Cloudy Weather
66°
Feels Like 66°
0
Humidity: 45%
UV Index: 2
Wind: 7 mph
6 PM
Cloudy Weather
64°
Feels Like 64°
0
Humidity: 50%
UV Index: 1
Wind: 7 mph
7 PM
Cloudy Weather
61°
Feels Like 57°
0
Humidity: 58%
UV Index: 0
Wind: 7 mph
8 PM
Cloudy Night
57°
Feels Like 55°
0
Humidity: 64%
UV Index: 0
Wind: 7 mph
9 PM
Cloudy Night
54°
Feels Like 54°
0
Humidity: 71%
UV Index: 0
Wind: 6 mph
10 PM
Cloudy Night
52°
Feels Like 50°
0
Humidity: 79%
UV Index: 0
Wind: 6 mph
11 PM
Cloudy Night
52°
Feels Like 48°
0
Humidity: 80%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

6 AM
34 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.77 µg/m³
  • PM10: 4.88 µg/m³
  • O3: 0.037 ppm
  • NO2: 1.7 ppb
  • SO2: 0.1 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

7 AM
31 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.1 µg/m³
  • PM10: 5.3 µg/m³
  • O3: 0.033 ppm
  • NO2: 1.9 ppb
  • SO2: 0 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

8 AM
28 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.43 µg/m³
  • PM10: 5.72 µg/m³
  • O3: 0.030 ppm
  • NO2: 2.5 ppb
  • SO2: 0 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

9 AM
26 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.76 µg/m³
  • PM10: 6.16 µg/m³
  • O3: 0.028 ppm
  • NO2: 3.2 ppb
  • SO2: 0 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

10 AM
26 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.26 µg/m³
  • PM10: 6.76 µg/m³
  • O3: 0.028 ppm
  • NO2: 2.9 ppb
  • SO2: 0 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

11 AM
30 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 6.16 µg/m³
  • PM10: 7.7 µg/m³
  • O3: 0.033 ppm
  • NO2: 2.1 ppb
  • SO2: 0.1 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

12 PM
32 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 6.56 µg/m³
  • PM10: 7.97 µg/m³
  • O3: 0.034 ppm
  • NO2: 1.8 ppb
  • SO2: 0.1 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

1 PM
35 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 6.8 µg/m³
  • PM10: 8.06 µg/m³
  • O3: 0.038 ppm
  • NO2: 1.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

2 PM
44 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.15 µg/m³
  • PM10: 6.26 µg/m³
  • O3: 0.047 ppm
  • NO2: 0.9 ppb
  • SO2: 0.9 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

3 PM
48 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.12 µg/m³
  • PM10: 5.18 µg/m³
  • O3: 0.052 ppm
  • NO2: 0.7 ppb
  • SO2: 1.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

4 PM
49 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.28 µg/m³
  • PM10: 5.33 µg/m³
  • O3: 0.053 ppm
  • NO2: 0.6 ppb
  • SO2: 1.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

5 PM
47 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.47 µg/m³
  • PM10: 5.52 µg/m³
  • O3: 0.051 ppm
  • NO2: 1.1 ppb
  • SO2: 1 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

6 PM
42 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.47 µg/m³
  • PM10: 5.49 µg/m³
  • O3: 0.045 ppm
  • NO2: 2.3 ppb
  • SO2: 0.7 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

7 PM
36 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.33 µg/m³
  • PM10: 5.34 µg/m³
  • O3: 0.039 ppm
  • NO2: 4 ppb
  • SO2: 0.4 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

8 PM
31 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.2 µg/m³
  • PM10: 5.22 µg/m³
  • O3: 0.034 ppm
  • NO2: 5 ppb
  • SO2: 0.3 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

9 PM
31 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.03 µg/m³
  • PM10: 5.02 µg/m³
  • O3: 0.033 ppm
  • NO2: 4.6 ppb
  • SO2: 0.2 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

10 PM
32 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.75 µg/m³
  • PM10: 4.67 µg/m³
  • O3: 0.035 ppm
  • NO2: 3.8 ppb
  • SO2: 0.2 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

11 PM
33 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.39 µg/m³
  • PM10: 4.23 µg/m³
  • O3: 0.036 ppm
  • NO2: 3.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.15 ppm

Health Recommendations:

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