Hourly Weather Forecast for Duluth, Minnesota

Hourly Weather | Today › Monday, April 27, 2026

Active Weather Warnings

Dense Fog Advisory

Duluth, Minnesota

4 PM

39°

Feels Like 34°

Humidity: 95%

UV Index: 1

Wind: 9 mph

5 PM

39°

Feels Like 30°

Humidity: 94%

UV Index: 1

Wind: 8 mph

6 PM

41°

Feels Like 34°

Humidity: 92%

UV Index: 0

Wind: 7 mph

7 PM

43°

Feels Like 36°

Humidity: 91%

UV Index: 0

Wind: 7 mph

8 PM

43°

Feels Like 34°

Humidity: 89%

UV Index: 0

Wind: 10 mph

9 PM

43°

Feels Like 30°

Humidity: 88%

UV Index: 0

Wind: 13 mph

10 PM

45°

Feels Like 36°

Humidity: 83%

UV Index: 0

Wind: 14 mph

11 PM

43°

Feels Like 32°

Humidity: 86%

UV Index: 0

Wind: 15 mph

Hourly Air Quality Forecast - AQI (US EPA)

4 PM

34 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 6.31 µg/m³
PM₁₀: 6.36 µg/m³
O₃: 0.036 ppm
NO₂: 1.1 ppb
SO₂: 0.1 ppb
CO: 0.16 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

5 PM

32 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 6.31 µg/m³
PM₁₀: 6.36 µg/m³
O₃: 0.034 ppm
NO₂: 1.3 ppb
SO₂: 0 ppb
CO: 0.16 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

6 PM

30 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 6.14 µg/m³
PM₁₀: 6.19 µg/m³
O₃: 0.032 ppm
NO₂: 1.5 ppb
SO₂: 0 ppb
CO: 0.16 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

7 PM

28 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 5.72 µg/m³
PM₁₀: 5.78 µg/m³
O₃: 0.031 ppm
NO₂: 1.8 ppb
SO₂: 0 ppb
CO: 0.16 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

8 PM

28 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 5.17 µg/m³
PM₁₀: 5.21 µg/m³
O₃: 0.030 ppm
NO₂: 2.1 ppb
SO₂: 0.1 ppb
CO: 0.15 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

9 PM

29 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 4.57 µg/m³
PM₁₀: 4.61 µg/m³
O₃: 0.032 ppm
NO₂: 2.1 ppb
SO₂: 0.1 ppb
CO: 0.15 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

10 PM

30 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 3.67 µg/m³
PM₁₀: 3.71 µg/m³
O₃: 0.033 ppm
NO₂: 1.8 ppb
SO₂: 0.1 ppb
CO: 0.14 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

11 PM

32 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 2.59 µg/m³
PM₁₀: 2.62 µg/m³
O₃: 0.034 ppm
NO₂: 1.2 ppb
SO₂: 0.1 ppb
CO: 0.13 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Current Real-Time Air Quality Report

Weather Alerts and Warnings for Duluth

Moderate Expected Likely

Dense Fog Advisory

Dense Fog Advisory issued April 27 at 11:28AM CDT until April 27 at 4:00PM CDT by NWS Duluth MN

Apr 27, 11:28 AM → Apr 27, 4:00 PM

WHAT: Visibility as low as one quarter mile in dense fog.

WHERE: Carlton and South St. Louis Counties. This includes the
Tribal Lands of the Fond du Lac Band.

WHEN: Until 4 PM CDT this afternoon.

IMPACTS: Low visibility could make driving conditions hazardous.

ADDITIONAL DETAILS: Dense fog is mainly confined to the higher
terrain of the Duluth area and inland away from Lake Superior.

+ Read More

If driving, slow down, use your low-beam headlights and fog lights, and leave plenty of distance ahead of you.

Updated: Apr 27, 1:57 PM Source: NWS Alert

Hourly Air Quality Forecast - AQI (US EPA)

Pollutant Concentrations:

Health Recommendations:

Pollutant Concentrations:

Health Recommendations:

Pollutant Concentrations:

Health Recommendations:

Pollutant Concentrations:

Health Recommendations:

Pollutant Concentrations:

Health Recommendations:

Pollutant Concentrations:

Health Recommendations:

Pollutant Concentrations:

Health Recommendations:

Pollutant Concentrations:

Health Recommendations:

Weather Alerts and Warnings for Duluth

Dense Fog Advisory

Explore U.S. Weather Trends