Today | Weather | Monday, September 21, 2026

Weather in Lafayette, Indiana

02:51 PM
Now
Cloudy Weather
64° F
Feels Like 63°
Precipitation 34 %
Wind 12 mph
UV Index (0 - 11+) 1
Humidity 72 %
Today
Rainy Weather
Day 64°
Night 57°
Precipitation 80 %
Wind 12 mph
UV Index (0 - 11+) 1

Lafayette Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 21, 2025)
Sunny with a Chance of Thunderstorms

Day

84°

Night

64°

Wind

6 mph

UV Index

50

Precipitation

49 %

Air Quality in Lafayette

NOW
33 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 4.26 µg/m³
PM10 4.62 µg/m³
O3 0.035 ppm
NO2 1.5 ppb
SO2 0.5 ppb
CO 0.17 ppm
NH3 0.56 µg/m³
NO 0.53 µg/m³
PM2.5 – 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)
PM2.54.26 µg/m³
PM104.62 µg/m³
O369.07 µg/m³
NO22.84 µg/m³
SO21.36 µg/m³
CO198.12 µg/m³
NH30.56 µg/m³
NO0.53 µg/m³