Hourly Weather | Today Monday, July 20, 2026
Active Weather Warnings
Springfield, Illinois
5 PM
Cloudy Weather
88°
Feels Like 95°
24
Humidity: 58%
UV Index: 3
Wind: 6 mph
6 PM
Cloudy Weather
88°
Feels Like 93°
19
Humidity: 61%
UV Index: 2
Wind: 7 mph
7 PM
Cloudy Weather
86°
Feels Like 91°
18
Humidity: 63%
UV Index: 1
Wind: 7 mph
8 PM
Cloudy Weather
82°
Feels Like 88°
15
Humidity: 72%
UV Index: 0
Wind: 7 mph
9 PM
Cloudy Night
81°
Feels Like 86°
15
Humidity: 78%
UV Index: 0
Wind: 6 mph
10 PM
Cloudy Night
79°
Feels Like 84°
15
Humidity: 83%
UV Index: 0
Wind: 7 mph
11 PM
Cloudy Night
79°
Feels Like 84°
15
Humidity: 83%
UV Index: 0
Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 13.49 µg/m³
  • PM10: 13.99 µg/m³
  • O3: 0.057 ppm
  • NO2: 1.2 ppb
  • SO2: 1.6 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 13.66 µg/m³
  • PM10: 14.2 µg/m³
  • O3: 0.055 ppm
  • NO2: 1.7 ppb
  • SO2: 1.6 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 13.3 µg/m³
  • PM10: 13.88 µg/m³
  • O3: 0.052 ppm
  • NO2: 2.2 ppb
  • SO2: 1.7 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 12.64 µg/m³
  • PM10: 13.27 µg/m³
  • O3: 0.047 ppm
  • NO2: 3 ppb
  • SO2: 1.7 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

9 PM
49 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 11.75 µg/m³
  • PM10: 12.4 µg/m³
  • O3: 0.039 ppm
  • NO2: 3.6 ppb
  • SO2: 1.5 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

10 PM
43 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 10.24 µg/m³
  • PM10: 10.88 µg/m³
  • O3: 0.032 ppm
  • NO2: 3.8 ppb
  • SO2: 1.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

11 PM
35 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 8.38 µg/m³
  • PM10: 8.95 µg/m³
  • O3: 0.025 ppm
  • NO2: 4 ppb
  • SO2: 0.9 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

Weather Alerts and Warnings for Springfield

Air Quality Alert

Air Quality Alert issued July 20 at 3:10AM CDT by NWS Lincoln IL
Jul 20, 3:10 AM Jul 21, 3:15 AM
The Illinois Environmental Protection Agency has issued an Areawide
Air Pollution Action Day for Monday July 20th for portions of
Illinois.

An Areawide Air Pollution Action Day is declared when weather
conditions are such that widespread ozone and or particulate levels
are forecast to be at OR ABOVE the Unhealthy for Sensitive Groups
(USG) category in all or nearly all Illinois AQI forecast sectors.

Areas both inside and outside of the Action Day coverage area are
likely to see smoke/particulates to a varying degree and duration
today with smoke likely decreasing from southwest to northeast
this afternoon. Those with air quality concerns or anyone in
Illinois with outdoor plans are encouraged to check current NowCast
readings or sign up for EnviroFlash alerts on AirNow. gov. Before
going outside, checking the NowCast AQI will help identify periods of
both poor and cleaner air quality regardless of the level of the
daily 24-hour AQI forecast.

AQI Category Guidance
Unhealthy for Sensitive Groups (USG) - Members of sensitive groups
may experience health effects. The general public is less likely to
be affected. Sensitive groups: Make outdoor activities shorter and
less intense. Its OK to be active outdoors, but take more breaks.
Watch for symptoms such as coughing or shortness of breath. People
with asthma: Follow your asthma action plan and keep quick relief
medicine handy. People with heart disease: Symptoms such as
palpitations, shortness of breath, or unusual fatigue may indicate a
serious problem. If you have any of these, contact your health care
provider. Unhealthy - Sensitive groups: Avoid long or intense outdoor
activities. Consider rescheduling or moving activities indoors.
Everyone else: Reduce long or intense activities. Take more breaks
during outdoor activities.

Media Contact... Illinois EPA
Updated: Jul 20, 3:04 PM Source: NWS Alert