Today | Weather | Sunday, October 19, 2025

Weather in Ann Arbor, Michigan

09:11 AM

Now

64° F

Feels Like 57°

Precipitation 58 %

Wind 23 mph

UV Index (0 - 11+) 2

Humidity 86 %

Today

Day 64°

Night 41°

Precipitation 96 %

Wind 21 mph

UV Index (0 - 11+) 10

Warning: High UV Index Today: 10

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.

Ann Arbor Weather Forecast Updated

34 minutes ago

Last updated on October 19, 2025 8:37 AM

Weather Forecast History

Last Year's Weather on This Day (October 19, 2024)

Day

72°

Night

41°

Wind

4 mph

Precipitation

Air Quality in Ann Arbor

NOW

39 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 4 µg/m³

PM₁₀ 4.04 µg/m³

O₃ 0.042 ppm

NO₂ 1 ppb

SO₂ 0.1 ppb

CO 0.11 ppm

NH₃ 0.31 µg/m³

NO 0 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 – 4 µg/m³

PM₁₀ – 4.04 µg/m³

O₃ – 83.3 µg/m³

NO₂ – 1.84 µg/m³

SO₂ – 0.26 µg/m³

CO – 129.66 µg/m³

NH₃ – 0.31 µg/m³

NO – 0 µg/m³

View Hourly Air Quality Forecast