Today | Weather | Wednesday, September 17, 2025

Weather in Grand Rapids, Michigan

03:39 AM

Now

57° F

Feels Like 55°

Precipitation 0 %

Wind 5 mph

Humidity 94 %

Today

Day 88°

Night 57°

Precipitation 1 %

Wind 8

UV Index (0 - 11+) 11

Warning: Extreme UV Index Today: 11+

Overexposure to the sun's harmful UV rays can cause sunburn and increase the risk of developing skin cancer, including melanoma. Protect yourself by wearing clothing that covers your skin, sunglasses, and a hat. Apply a broad-spectrum sunscreen with an SPF of 30 or higher every two hours, even on cloudy days. Minimize direct sun exposure during peak hours (10 AM to 4 PM) to reduce the risk.

Grand Rapids Weather Forecast Updated

9 minutes ago

Last updated on September 17, 2025 3:30 AM

Weather Forecast History

Last Year's Weather on This Day (September 17, 2024)

Day

86°

Night

55°

Wind

4 mph

UV Index

Precipitation

Air quality in Grand Rapids

NOW

54 AQI

Moderate air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 10.22 µg/m³

PM10 10.47 µg/m³

O₃ 23.48 ppb

NO₂ 9.95 ppb

SO₂ 0.70 ppb

CO 243.40 ppb

PM_2.5 – Fine particles <2.5μm

PM₁₀ – Inhalable particles <10μm

O₃ – Ozone

NO₂ – Nitrogen dioxide

SO₂ – Sulfur dioxide

CO – Carbon monoxide

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

View Hourly Air Quality Forecast