Hourly Weather | Today Tuesday, July 21, 2026
Active Weather Warnings
Duluth, Minnesota
9 AM
Cloudy Weather
66°
Feels Like 66°
34
Humidity: 76%
UV Index: 3
Wind: 14 mph
10 AM
Cloudy Weather
68°
Feels Like 70°
39
Humidity: 69%
UV Index: 4
Wind: 15 mph
11 AM
Cloudy Weather
70°
Feels Like 72°
49
Humidity: 64%
UV Index: 6
Wind: 15 mph
12 PM
Partly Sunny with Showers
70°
Feels Like 70°
58
Humidity: 61%
UV Index: 8
Wind: 15 mph
1 PM
Partly Sunny with Showers
70°
Feels Like 72°
58
Humidity: 59%
UV Index: 9
Wind: 14 mph
2 PM
Cloudy Weather
70°
Feels Like 73°
49
Humidity: 56%
UV Index: 8
Wind: 14 mph
3 PM
Cloudy Weather
72°
Feels Like 73°
48
Humidity: 51%
UV Index: 6
Wind: 13 mph
4 PM
Partly Sunny with Showers
70°
Feels Like 70°
52
Humidity: 52%
UV Index: 4
Wind: 12 mph
5 PM
Cloudy Weather
70°
Feels Like 70°
44
Humidity: 52%
UV Index: 3
Wind: 12 mph
6 PM
Partly Sunny with Showers
68°
Feels Like 64°
52
Humidity: 54%
UV Index: 2
Wind: 10 mph
7 PM
Cloudy Weather
66°
Feels Like 64°
48
Humidity: 56%
UV Index: 1
Wind: 10 mph
8 PM
Sunny Weather
66°
Feels Like 63°
0
Humidity: 58%
UV Index: 0
Wind: 9 mph
9 PM
Night
63°
Feels Like 61°
0
Humidity: 66%
UV Index: 0
Wind: 7 mph
10 PM
Night
61°
Feels Like 59°
0
Humidity: 72%
UV Index: 0
Wind: 6 mph
11 PM
Night
57°
Feels Like 55°
0
Humidity: 79%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

9 AM
14 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.5 µg/m³
  • O3: 0.016 ppm
  • NO2: 0.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

10 AM
16 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.5 µg/m³
  • O3: 0.018 ppm
  • NO2: 0.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

11 AM
21 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.5 µg/m³
  • O3: 0.022 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

12 PM
26 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.51 µg/m³
  • O3: 0.028 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

1 PM
28 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.54 µg/m³
  • PM10: 0.59 µg/m³
  • O3: 0.030 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

2 PM
30 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.6 µg/m³
  • PM10: 0.66 µg/m³
  • O3: 0.032 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

3 PM
31 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.63 µg/m³
  • PM10: 0.68 µg/m³
  • O3: 0.033 ppm
  • NO2: 0.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

4 PM
32 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.64 µg/m³
  • PM10: 0.69 µg/m³
  • O3: 0.034 ppm
  • NO2: 0.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.11 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:

  • PM2.5: 0.63 µg/m³
  • PM10: 0.68 µg/m³
  • O3: 0.035 ppm
  • NO2: 0.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

6 PM
32 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.59 µg/m³
  • PM10: 0.65 µg/m³
  • O3: 0.034 ppm
  • NO2: 0.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

7 PM
31 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.53 µg/m³
  • PM10: 0.58 µg/m³
  • O3: 0.033 ppm
  • NO2: 0.3 ppb
  • SO2: 0.1 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

8 PM
29 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.51 µg/m³
  • O3: 0.032 ppm
  • NO2: 0.3 ppb
  • SO2: 0.1 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

9 PM
27 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.5 µg/m³
  • O3: 0.029 ppm
  • NO2: 0.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

10 PM
25 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.5 µg/m³
  • O3: 0.027 ppm
  • NO2: 0.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

11 PM
23 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.5 µg/m³
  • O3: 0.025 ppm
  • NO2: 0.5 ppb
  • SO2: 0.1 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

Weather Alerts and Warnings for Duluth

Moderate Expected Observed

Special Weather Statement

Special Weather Statement issued July 21 at 3:27AM CDT by NWS Duluth MN
Jul 21, 3:27 AM Jul 21, 10:00 AM
Due to continued dry conditions in forested areas and gusty north
to northwest winds around 20 to 30 mph expected today, conditions
will remain favorable for near-critical fire weather conditions
through this afternoon. This is despite higher RH values expected today.
The situation is evaluated daily by the National Weather Service
and the Minnesota Interagency Fire Center.

Dry and windy conditions could lead to the rapid spread of fires
today.
Updated: Jul 21, 7:15 AM Source: NWS Alert