Hourly Weather | Today Wednesday, March 18, 2026
St. Paul, Minnesota
1 PM
Cloudy Weather
37°
Feels Like 39°
0
Humidity: 73%
UV Index: 3
Wind: 7 mph
2 PM
Cloudy Weather
37°
Feels Like 39°
0
Humidity: 77%
UV Index: 2
Wind: 7 mph
3 PM
Cloudy Weather
39°
Feels Like 37°
0
Humidity: 78%
UV Index: 2
Wind: 7 mph
4 PM
Cloudy Weather
39°
Feels Like 37°
0
Humidity: 78%
UV Index: 1
Wind: 7 mph
5 PM
Cloudy Weather
39°
Feels Like 37°
0
Humidity: 84%
UV Index: 1
Wind: 7 mph
6 PM
Cloudy Weather
37°
Feels Like 36°
0
Humidity: 89%
UV Index: 1
Wind: 7 mph
7 PM
Cloudy Weather
36°
Feels Like 34°
0
Humidity: 93%
UV Index: 0
Wind: 6 mph
8 PM
Cloudy Weather
39°
Feels Like 37°
0
Humidity: 85%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Weather
37°
Feels Like 36°
0
Humidity: 89%
UV Index: 0
Wind: 5 mph
10 PM
Cloudy Weather
36°
Feels Like 36°
0
Humidity: 94%
UV Index: 0
Wind: 5 mph
11 PM
Cloudy Weather
34°
Feels Like 34°
0
Humidity: 97%
UV Index: 0
Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

1 PM
59 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 15.98 µg/m³
  • PM10: 17.81 µg/m³
  • O3: 0.040 ppm
  • NO2: 1.9 ppb
  • SO2: 0.1 ppb
  • CO: 0.19 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

2 PM
70 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 21.15 µg/m³
  • PM10: 23.15 µg/m³
  • O3: 0.044 ppm
  • NO2: 1.8 ppb
  • SO2: 0.1 ppb
  • CO: 0.20 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

3 PM
79 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 25.44 µg/m³
  • PM10: 27.52 µg/m³
  • O3: 0.048 ppm
  • NO2: 1.8 ppb
  • SO2: 0.1 ppb
  • CO: 0.20 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

4 PM
84 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 28.04 µg/m³
  • PM10: 30.12 µg/m³
  • O3: 0.051 ppm
  • NO2: 1.7 ppb
  • SO2: 0 ppb
  • CO: 0.20 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

5 PM
86 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 28.65 µg/m³
  • PM10: 30.73 µg/m³
  • O3: 0.053 ppm
  • NO2: 2 ppb
  • SO2: 0 ppb
  • CO: 0.20 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

6 PM
84 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 27.84 µg/m³
  • PM10: 29.95 µg/m³
  • O3: 0.053 ppm
  • NO2: 2.6 ppb
  • SO2: 0 ppb
  • CO: 0.20 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

7 PM
80 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 26.08 µg/m³
  • PM10: 28.25 µg/m³
  • O3: 0.051 ppm
  • NO2: 3.4 ppb
  • SO2: 0 ppb
  • CO: 0.20 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

8 PM
75 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 23.69 µg/m³
  • PM10: 25.91 µg/m³
  • O3: 0.049 ppm
  • NO2: 3.5 ppb
  • SO2: 0 ppb
  • CO: 0.20 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

9 PM
69 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 21.11 µg/m³
  • PM10: 23.39 µg/m³
  • O3: 0.046 ppm
  • NO2: 3.3 ppb
  • SO2: 0 ppb
  • CO: 0.20 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

10 PM
63 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 18.22 µg/m³
  • PM10: 20.55 µg/m³
  • O3: 0.044 ppm
  • NO2: 3.1 ppb
  • SO2: 0 ppb
  • CO: 0.19 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

11 PM
57 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 15.2 µg/m³
  • PM10: 17.56 µg/m³
  • O3: 0.042 ppm
  • NO2: 2.9 ppb
  • SO2: 0 ppb
  • CO: 0.18 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.