Hourly Weather Forecast for Champaign, Illinois

Hourly Weather | Today › Tuesday, September 1, 2026

Active Weather Warnings

Heat Advisory

Champaign, Illinois

11 AM

88°

Feels Like 99°

Humidity: 62%

UV Index: 5

Wind: 8 mph

12 PM

90°

Feels Like 100°

Humidity: 56%

UV Index: 6

Wind: 8 mph

1 PM

91°

Feels Like 102°

Humidity: 53%

UV Index: 7

Wind: 8 mph

2 PM

93°

Feels Like 104°

Humidity: 49%

UV Index: 6

Wind: 7 mph

3 PM

95°

Feels Like 104°

Humidity: 45%

UV Index: 5

Wind: 7 mph

4 PM

95°

Feels Like 102°

Humidity: 46%

UV Index: 4

Wind: 7 mph

5 PM

91°

Feels Like 99°

Humidity: 49%

UV Index: 2

Wind: 6 mph

6 PM

90°

Feels Like 97°

Humidity: 55%

UV Index: 1

Wind: 6 mph

7 PM

86°

Feels Like 93°

Humidity: 64%

UV Index: 0

Wind: 5 mph

8 PM

82°

Feels Like 90°

Humidity: 71%

UV Index: 0

Wind: 4 mph

9 PM

81°

Feels Like 86°

Humidity: 77%

UV Index: 0

Wind: 4 mph

10 PM

77°

Feels Like 82°

Humidity: 83%

UV Index: 0

Wind: 5 mph

11 PM

73°

Feels Like 79°

Humidity: 90%

UV Index: 0

Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

11 AM

41 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 9.75 µg/m³
PM₁₀: 10.5 µg/m³
O₃: 0.041 ppm
NO₂: 1.5 ppb
SO₂: 1.4 ppb
CO: 0.12 ppm

Health Recommendations:

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

12 PM

45 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 10.84 µg/m³
PM₁₀: 11.58 µg/m³
O₃: 0.049 ppm
NO₂: 1 ppb
SO₂: 1.6 ppb
CO: 0.12 ppm

Health Recommendations:

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

1 PM

54 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 12.02 µg/m³
PM₁₀: 12.79 µg/m³
O₃: 0.055 ppm
NO₂: 0.8 ppb
SO₂: 1.7 ppb
CO: 0.11 ppm

Health Recommendations:

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

2 PM

67 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 11.54 µg/m³
PM₁₀: 12.24 µg/m³
O₃: 0.059 ppm
NO₂: 0.5 ppb
SO₂: 1.3 ppb
CO: 0.11 ppm

Health Recommendations:

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

3 PM

65 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 10.94 µg/m³
PM₁₀: 11.58 µg/m³
O₃: 0.059 ppm
NO₂: 0.4 ppb
SO₂: 1 ppb
CO: 0.10 ppm

Health Recommendations:

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

4 PM

63 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 10.78 µg/m³
PM₁₀: 11.4 µg/m³
O₃: 0.058 ppm
NO₂: 0.5 ppb
SO₂: 0.9 ppb
CO: 0.10 ppm

Health Recommendations:

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

5 PM

47 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 10.91 µg/m³
PM₁₀: 11.53 µg/m³
O₃: 0.050 ppm
NO₂: 1.1 ppb
SO₂: 0.7 ppb
CO: 0.11 ppm

Health Recommendations:

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

6 PM

46 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 11 µg/m³
PM₁₀: 11.63 µg/m³
O₃: 0.040 ppm
NO₂: 2.3 ppb
SO₂: 0.5 ppb
CO: 0.12 ppm

Health Recommendations:

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

7 PM

45 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 10.76 µg/m³
PM₁₀: 11.4 µg/m³
O₃: 0.033 ppm
NO₂: 3.5 ppb
SO₂: 0.4 ppb
CO: 0.13 ppm

Health Recommendations:

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

8 PM

43 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 10.28 µg/m³
PM₁₀: 10.92 µg/m³
O₃: 0.029 ppm
NO₂: 4 ppb
SO₂: 0.3 ppb
CO: 0.13 ppm

Health Recommendations:

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

9 PM

41 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 9.74 µg/m³
PM₁₀: 10.36 µg/m³
O₃: 0.026 ppm
NO₂: 3.8 ppb
SO₂: 0.2 ppb
CO: 0.13 ppm

Health Recommendations:

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

10 PM

38 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 9.05 µg/m³
PM₁₀: 9.64 µg/m³
O₃: 0.025 ppm
NO₂: 3.5 ppb
SO₂: 0.1 ppb
CO: 0.13 ppm

Health Recommendations:

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

11 PM

32 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 7.8 µg/m³
PM₁₀: 8.34 µg/m³
O₃: 0.029 ppm
NO₂: 2.5 ppb
SO₂: 0.1 ppb
CO: 0.12 ppm

Health Recommendations:

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

Current Real-Time Air Quality Report

Weather Alerts and Warnings for Champaign

Moderate Expected Likely

Heat Advisory

Heat Advisory issued September 1 at 2:48AM CDT until September 3 at 7:00PM CDT by NWS Lincoln IL

Sep 1, 1:00 PM → Sep 3, 7:00 PM

WHAT: Afternoon Heat index values up to 105 expected, only falling
into the mid to upper 70s at night.

WHERE: Marshall, McLean, Woodford, Champaign, Edgar, and Vermilion
Counties.

WHEN: From 1 PM this afternoon to 7 PM CDT Thursday.

IMPACTS: Hot temperatures and high humidity may cause heat
illnesses.

+ Read More

Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.

Updated: Sep 1, 10:13 AM Source: NWS Alert

Hourly Air Quality Forecast - AQI (US EPA)

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Weather Alerts and Warnings for Champaign

Heat Advisory

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