Today | Weather | Monday, September 21, 2026

Weather in Bloomington, Illinois

01:51 PM
Now
Rainy Weather
63° F
Feels Like 59°
Precipitation 40 %
Wind 12 mph
UV Index (0 - 11+) 1
Humidity 84 %
Today
Rainy Weather
Day 64°
Night 55°
Precipitation 65 %
Wind 13 mph
UV Index (0 - 11+) 1

Bloomington 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

86°

Night

64°

Wind

8 mph

UV Index

50

Precipitation

55 %

Air Quality in Bloomington

NOW
26 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.14 µg/m³
PM10 3.33 µg/m³
O3 0.028 ppm
NO2 1.7 ppb
SO2 0.5 ppb
CO 0.17 ppm
NH3 0.46 µg/m³
NO 0.45 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)
PM2.53.14 µg/m³
PM103.33 µg/m³
O354.15 µg/m³
NO23.27 µg/m³
SO21.42 µg/m³
CO195.4 µg/m³
NH30.46 µg/m³
NO0.45 µg/m³