Today | Weather | Monday, July 20, 2026

Active Weather Warnings

Air Quality Alert

Weather in Lafayette, Indiana

05:25 PM

Now

82° F

Feels Like 88°

Precipitation 0 %

Wind 7 mph

UV Index (0 - 11+) 3

Humidity 60 %

Today

Day 82°

Night 72°

Precipitation 49 %

Wind 5 mph

UV Index (0 - 11+) 9

Warning: High UV Index Today: 9

High risk of harm from unprotected sun exposure. Take precautions: wear a hat, sunglasses, and apply sunscreen regularly if you’ll be outdoors for extended periods.

Lafayette Weather Forecast Updated

19 minutes ago

Last updated on July 20, 2026 at 5:05 PM

Air Quality in Lafayette

NOW

68 AQI

Moderate air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 14.75 µg/m³

PM₁₀ 14.99 µg/m³

O₃ 0.060 ppm

NO₂ 0.6 ppb

SO₂ 0.9 ppb

CO 0.33 ppm

NH₃ 0.23 µg/m³

NO 0.16 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 acceptable; however, for some pollutants, there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.

Show raw pollutant concentrations (µg/m³)

PM_2.5 – 14.75 µg/m³

PM₁₀ – 14.99 µg/m³

O₃ – 117.54 µg/m³

NO₂ – 1.12 µg/m³

SO₂ – 2.27 µg/m³

CO – 382.33 µg/m³

NH₃ – 0.23 µg/m³

NO – 0.16 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Lafayette

Air Quality Alert

Air Quality Alert issued July 20 at 11:01AM EDT by NWS Indianapolis IN

Jul 20, 11:01 AM → Jul 21, 12:00 AM

The officials at the Indiana Department of Environmental Management
have declared an Air Quality Action Day, IN EFFECT UNTIL MIDNIGHT
EDT TONIGHT.

An Air Quality Action Day for PM 2.5 has been issued. Fine
particulate levels are expected to be in the Unhealthy for Sensitive
Groups range. Active children and adults, and people with
respiratory disease, such as asthma should limit prolonged outdoor
exposure.

Here are some recommended actions that the public can take:

* Walk, bike, carpool or use public transportation.
* Avoid using the drive-through and combine errands into one trip.
* Avoid refueling your vehicle or using gasoline-powered lawn
equipment until after 7pm.
* Turn off your engine when idling for more than 30 seconds.
* Conserve energy by turning off lights or setting the air
conditioner to 75 degrees or above.

For additional information, please visit the IDEM Smog page at:

http://www.in.gov/idem/airmonitoring/smogwatch/

Updated: Jul 20, 5:05 PM Source: NWS Alert