Today | Weather | Friday, October 9, 2026

Weather in Ann Arbor, Michigan

06:28 AM
Now
Cloudy Night
39° F
Feels Like 39°
Precipitation 0 %
Wind 5 mph
Humidity 97 %
Today
Cloudy Weather
Day 72°
Night 54°
Precipitation 2 %
Wind 6 mph
UV Index (0 - 11+) 4

Ann Arbor Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (October 9, 2025)
Cloudy Night

Day

63°

Night

37°

Wind

5 mph

Precipitation

0 %

Air Quality in Ann Arbor

NOW
23 AQI
Good air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 5.41 µg/m³
PM10 6.6 µg/m³
O3 0.015 ppm
NO2 5.4 ppb
SO2 0.1 ppb
CO 0.17 ppm
NH3 5.9 µg/m³
NO 0 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)
PM2.5 – 5.41 µg/m³
PM10 – 6.6 µg/m³
O3 – 29.94 µg/m³
NO2 – 10.24 µg/m³
SO2 – 0.15 µg/m³
CO – 196.64 µg/m³
NH3 – 5.9 µg/m³
NO – 0 µg/m³