Hourly Weather | Today Wednesday, March 18, 2026
Evanston, Illinois
4 AM
Snowy Weather
25°
Feels Like
56
Frost Risk: 53%
Humidity: 80%
UV Index: 0
Wind: 15 mph
5 AM
Cloudy Weather
27°
Feels Like 10°
47
Humidity: 79%
UV Index: 0
Wind: 15 mph
6 AM
Snowy Weather
27°
Feels Like
55
Humidity: 79%
UV Index: 0
Wind: 16 mph
7 AM
Cloudy Weather
27°
Feels Like 12°
47
Humidity: 79%
UV Index: 0
Wind: 16 mph
8 AM
Snowy Weather
27°
Feels Like
61
Humidity: 78%
UV Index: 0
Wind: 16 mph
9 AM
Cloudy Weather
27°
Feels Like 12°
46
Humidity: 79%
UV Index: 1
Wind: 17 mph
10 AM
Snowy Weather
28°
Feels Like 12°
61
Humidity: 77%
UV Index: 1
Wind: 17 mph
11 AM
Cloudy Weather
30°
Feels Like 18°
40
Humidity: 75%
UV Index: 1
Wind: 16 mph
12 PM
Cloudy Weather
34°
Feels Like 21°
34
Humidity: 71%
UV Index: 1
Wind: 15 mph
1 PM
Cloudy Weather
36°
Feels Like 25°
27
Humidity: 69%
UV Index: 2
Wind: 14 mph
2 PM
Cloudy Weather
37°
Feels Like 30°
14
Humidity: 67%
UV Index: 2
Wind: 13 mph
3 PM
Cloudy Weather
39°
Feels Like 34°
14
Humidity: 66%
UV Index: 2
Wind: 12 mph
4 PM
Cloudy Weather
41°
Feels Like 37°
14
Humidity: 66%
UV Index: 2
Wind: 9 mph
5 PM
Cloudy Weather
43°
Feels Like 39°
14
Humidity: 64%
UV Index: 1
Wind: 9 mph
6 PM
Cloudy Weather
41°
Feels Like 36°
14
Humidity: 70%
UV Index: 1
Wind: 8 mph
7 PM
Cloudy Weather
39°
Feels Like 36°
12
Humidity: 75%
UV Index: 0
Wind: 7 mph
8 PM
Cloudy Weather
37°
Feels Like 36°
7
Humidity: 77%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Weather
37°
Feels Like 36°
7
Humidity: 81%
UV Index: 0
Wind: 6 mph
10 PM
Cloudy Weather
37°
Feels Like 34°
6
Humidity: 83%
UV Index: 0
Wind: 6 mph
11 PM
Cloudy Weather
36°
Feels Like 34°
5
Humidity: 83%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

4 AM
48 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.52 µg/m³
  • PM10: 3.62 µg/m³
  • O3: 0.052 ppm
  • NO2: 1.2 ppb
  • SO2: 0.5 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

5 AM
48 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.48 µg/m³
  • PM10: 3.59 µg/m³
  • O3: 0.051 ppm
  • NO2: 1.2 ppb
  • SO2: 0.6 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.5 µg/m³
  • PM10: 3.62 µg/m³
  • O3: 0.051 ppm
  • NO2: 1.2 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 AM
47 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.59 µg/m³
  • PM10: 3.77 µg/m³
  • O3: 0.050 ppm
  • NO2: 1.2 ppb
  • SO2: 0.8 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.91 µg/m³
  • PM10: 4.2 µg/m³
  • O3: 0.050 ppm
  • NO2: 1.5 ppb
  • SO2: 1 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.22 µg/m³
  • PM10: 4.68 µg/m³
  • O3: 0.049 ppm
  • NO2: 2.2 ppb
  • SO2: 1.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.53 µg/m³
  • PM10: 5.13 µg/m³
  • O3: 0.049 ppm
  • NO2: 2.4 ppb
  • SO2: 1.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.09 µg/m³
  • PM10: 5.79 µg/m³
  • O3: 0.049 ppm
  • NO2: 2 ppb
  • SO2: 1.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.07 µg/m³
  • PM10: 6.8 µg/m³
  • O3: 0.050 ppm
  • NO2: 1.7 ppb
  • SO2: 1 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.59 µg/m³
  • PM10: 8.32 µg/m³
  • O3: 0.052 ppm
  • NO2: 1.4 ppb
  • SO2: 0.8 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

2 PM
54 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 9.53 µg/m³
  • PM10: 10.27 µg/m³
  • O3: 0.055 ppm
  • NO2: 1.3 ppb
  • SO2: 0.6 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

3 PM
61 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 11.14 µg/m³
  • PM10: 11.95 µg/m³
  • O3: 0.058 ppm
  • NO2: 1.3 ppb
  • SO2: 0.6 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

4 PM
66 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 12.39 µg/m³
  • PM10: 13.3 µg/m³
  • O3: 0.059 ppm
  • NO2: 1.5 ppb
  • SO2: 0.7 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

5 PM
60 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 13.68 µg/m³
  • PM10: 14.75 µg/m³
  • O3: 0.057 ppm
  • NO2: 2.6 ppb
  • SO2: 0.6 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 15.13 µg/m³
  • PM10: 16.41 µg/m³
  • O3: 0.051 ppm
  • NO2: 5.2 ppb
  • SO2: 0.5 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.

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

Pollutant Concentrations:

  • PM2.5: 16.45 µg/m³
  • PM10: 17.96 µg/m³
  • O3: 0.044 ppm
  • NO2: 8.6 ppb
  • SO2: 0.4 ppb
  • CO: 0.22 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 17.78 µg/m³
  • PM10: 19.54 µg/m³
  • O3: 0.039 ppm
  • NO2: 10.3 ppb
  • SO2: 0.4 ppb
  • CO: 0.23 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 19.32 µg/m³
  • PM10: 21.32 µg/m³
  • O3: 0.035 ppm
  • NO2: 10.7 ppb
  • SO2: 0.3 ppb
  • CO: 0.25 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 21.02 µg/m³
  • PM10: 23.15 µg/m³
  • O3: 0.032 ppm
  • NO2: 10.7 ppb
  • SO2: 0.2 ppb
  • CO: 0.25 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 22.02 µg/m³
  • PM10: 24.18 µg/m³
  • O3: 0.029 ppm
  • NO2: 10.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.26 ppm

Health Recommendations:

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