Hourly Weather | Today Sunday, December 14, 2025
Active Weather Warnings
Chicago, Illinois
8 AM
Cloudy Weather
Feels Like -24°
0
Humidity: 82%
Wind: 15 mph
UV Index: 0
9 AM
Cloudy Weather
Feels Like -18°
0
Humidity: 79%
Wind: 14 mph
UV Index: 1
10 AM
Cloudy Weather
Feels Like -13°
0
Humidity: 74%
Wind: 13 mph
UV Index: 2
11 AM
Sunny Weather
Feels Like -8°
0
Humidity: 70%
Wind: 13 mph
UV Index: 2
12 PM
Sunny Weather
Feels Like -6°
0
Humidity: 69%
Wind: 12 mph
UV Index: 2
1 PM
Sunny Weather
10°
Feels Like -2°
0
Humidity: 67%
Wind: 12 mph
UV Index: 2
2 PM
Sunny Weather
10°
Feels Like
0
Humidity: 67%
Wind: 12 mph
UV Index: 2
3 PM
Sunny Weather
12°
Feels Like
0
Humidity: 65%
Wind: 11 mph
UV Index: 1
4 PM
Cloudy Night
10°
Feels Like -2°
0
Humidity: 69%
Wind: 11 mph
UV Index: 0
5 PM
Cloudy Night
10°
Feels Like -4°
0
Humidity: 73%
Wind: 11 mph
UV Index: 0
6 PM
Cloudy Night
10°
Feels Like -4°
0
Humidity: 73%
Wind: 11 mph
UV Index: 0
7 PM
Cloudy Night
10°
Feels Like -8°
0
Humidity: 75%
Wind: 13 mph
UV Index: 0
8 PM
Cloudy Night
Feels Like -9°
0
Humidity: 77%
Wind: 13 mph
UV Index: 0
9 PM
Cloudy Night
Feels Like -9°
0
Humidity: 77%
Wind: 13 mph
UV Index: 0
10 PM
Cloudy Night
Feels Like -11°
0
Humidity: 77%
Wind: 14 mph
UV Index: 0
11 PM
Cloudy Night
Feels Like -15°
0
Humidity: 78%
Wind: 16 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 1.9 µg/m³
  • PM10: 2.13 µg/m³
  • O3: 0.037 ppm
  • NO2: 2.3 ppb
  • SO2: 0.4 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.87 µg/m³
  • PM10: 2.1 µg/m³
  • O3: 0.038 ppm
  • NO2: 2.1 ppb
  • SO2: 0.4 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.87 µg/m³
  • PM10: 2.11 µg/m³
  • O3: 0.038 ppm
  • NO2: 1.7 ppb
  • SO2: 0.4 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.99 µg/m³
  • PM10: 2.23 µg/m³
  • O3: 0.038 ppm
  • NO2: 1.5 ppb
  • SO2: 0.4 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.26 µg/m³
  • PM10: 2.5 µg/m³
  • O3: 0.038 ppm
  • NO2: 1.5 ppb
  • SO2: 0.4 ppb
  • CO: 0.14 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: 2.69 µg/m³
  • PM10: 2.95 µg/m³
  • O3: 0.038 ppm
  • NO2: 1.6 ppb
  • SO2: 0.5 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.18 µg/m³
  • PM10: 3.46 µg/m³
  • O3: 0.038 ppm
  • NO2: 1.9 ppb
  • SO2: 0.5 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.56 µg/m³
  • PM10: 3.87 µg/m³
  • O3: 0.037 ppm
  • NO2: 2.7 ppb
  • SO2: 0.6 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.88 µg/m³
  • PM10: 4.23 µg/m³
  • O3: 0.036 ppm
  • NO2: 4 ppb
  • SO2: 0.7 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.19 µg/m³
  • PM10: 4.6 µg/m³
  • O3: 0.034 ppm
  • NO2: 5.4 ppb
  • SO2: 0.8 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.56 µg/m³
  • PM10: 5.04 µg/m³
  • O3: 0.033 ppm
  • NO2: 6.1 ppb
  • SO2: 0.8 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.94 µg/m³
  • PM10: 5.48 µg/m³
  • O3: 0.032 ppm
  • NO2: 6.6 ppb
  • SO2: 0.8 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.36 µg/m³
  • PM10: 5.96 µg/m³
  • O3: 0.031 ppm
  • NO2: 6.9 ppb
  • SO2: 0.8 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.74 µg/m³
  • PM10: 6.4 µg/m³
  • O3: 0.030 ppm
  • NO2: 7 ppb
  • SO2: 0.7 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.04 µg/m³
  • PM10: 6.67 µg/m³
  • O3: 0.030 ppm
  • NO2: 6.8 ppb
  • SO2: 0.7 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.19 µg/m³
  • PM10: 6.77 µg/m³
  • O3: 0.030 ppm
  • NO2: 6.4 ppb
  • SO2: 0.7 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

Weather Alerts and Warnings for Chicago

Moderate Expected Likely

Cold Weather Advisory

Cold Weather Advisory issued December 14 at 2:48AM CST until December 14 at 12:00PM CST by NWS Chicago IL
Dec 14, 2:48 AM Dec 14, 12:00 PM
WHAT: Very cold wind chills of 20 to 25 degrees below zero
expected.

WHERE: Portions of central, east central, north central, and
northeast Illinois and northwest Indiana.

WHEN: Until noon CST /1 PM EST/ today.

IMPACTS: The dangerously cold wind chills as low as 25 below zero
could cause frostbite on exposed skin in as little as 30 minutes.
+ Read More
Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves.
Updated: Dec 14, 6:25 AM Source: NWS Alert
Unknown Future Possible

Hydrologic Outlook

Hydrologic Outlook issued December 13 at 9:46AM CST by NWS Chicago IL
Dec 13, 9:46 AM Dec 14, 10:15 AM
ESFLOT

Recent reports from river ice spotters and river gauges indicate
that some melting of ice has occurred over the last few days, but
isolated areas of heavy river ice coverage continue. Very cold
temperatures this weekend will cause river ice to expand in
coverage. Ice jams will be possible in isolated areas along the
Rock, Fox, Des Plaines, and Kankakee rivers into early next week.
Ice jams may cause rises on area rivers with little warning.

Warmer temperatures may return to the area by late next week, which
could begin a slow melt of river ice.

This outlook means that elevated water levels and potential impacts
are possible, but not yet certain. Persons with interests along area
rivers should closely monitor the latest forecasts.

This outlook may be updated by tomorrow afternoon.
Updated: Dec 14, 6:25 AM Source: NWS Alert