Today | Weather | Tuesday, September 1, 2026

Active Weather Warnings

Heat Advisory

Weather in Champaign, Illinois

10:24 AM

Now

82° F

Feels Like 91°

Precipitation 0 %

Wind 8 mph

UV Index (0 - 11+) 4

Humidity 68 %

Today

Day 95°

Night 70°

Precipitation 1 %

Wind 7 mph

UV Index (0 - 11+) 7

Champaign Weather Forecast Updated

11 minutes ago

Last updated on September 01, 2026 at 10:13 AM

Air Quality in Champaign

NOW

39 AQI

Good air quality Dominant pollutant: PM_2.5

Pollutant Concentrations:

PM_2.5 9.32 µg/m³

PM₁₀ 10.07 µg/m³

O₃ 0.032 ppm

NO₂ 2 ppb

SO₂ 0.9 ppb

CO 0.13 ppm

NH₃ 1.13 µg/m³

NO 0.92 µg/m³

PM_2.5 – Fine particles <2.5μm

PM₁₀ – Inhalable particles <10μm

O₃ – Ozone

NO₂ – Nitrogen dioxide

SO₂ – Sulfur dioxide

CO – Carbon monoxide

NH₃ – Ammonia

NO – Nitric oxide

Health Recommendations:

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

Show raw pollutant concentrations (µg/m³)

PM_2.5 – 9.32 µg/m³

PM₁₀ – 10.07 µg/m³

O₃ – 61.97 µg/m³

NO₂ – 3.69 µg/m³

SO₂ – 2.44 µg/m³

CO – 153.04 µg/m³

NH₃ – 1.13 µg/m³

NO – 0.92 µg/m³

View Hourly Air Quality Forecast

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