Hourly Weather | Today Tuesday, April 7, 2026
South Portland, Maine
2 PM
Rainy Weather
36°
Feels Like 25°
79
Humidity: 86%
UV Index: 1
Wind: 12 mph
3 PM
Snowy Weather
36°
Feels Like 25°
85
Humidity: 87%
UV Index: 1
Wind: 12 mph
4 PM
Snowy Weather
36°
Feels Like 25°
83
Humidity: 86%
UV Index: 1
Wind: 11 mph
5 PM
Cloudy Weather
36°
Feels Like 28°
49
Humidity: 86%
UV Index: 1
Wind: 11 mph
6 PM
Snowy Weather
36°
Feels Like 23°
58
Humidity: 88%
UV Index: 0
Wind: 12 mph
7 PM
Cloudy Weather
36°
Feels Like 25°
49
Humidity: 88%
UV Index: 0
Wind: 12 mph
8 PM
Snowy Weather
34°
Feels Like 25°
68
Humidity: 90%
UV Index: 0
Wind: 8 mph
9 PM
Cloudy Night
34°
Feels Like 25°
49
Humidity: 86%
UV Index: 0
Wind: 9 mph
10 PM
Snowy Weather
32°
Feels Like 18°
67
Humidity: 77%
UV Index: 0
Wind: 14 mph
11 PM
Cloudy Night
32°
Feels Like 18°
40
Humidity: 70%
UV Index: 0
Wind: 15 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 2.33 µg/m³
  • PM10: 3.26 µg/m³
  • O3: 0.049 ppm
  • NO2: 5.7 ppb
  • SO2: 0.5 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.05 µg/m³
  • PM10: 4.05 µg/m³
  • O3: 0.050 ppm
  • NO2: 6.3 ppb
  • SO2: 0.6 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.07 µg/m³
  • PM10: 3.93 µg/m³
  • O3: 0.050 ppm
  • NO2: 6.4 ppb
  • SO2: 0.6 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

5 PM
47 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.51 µg/m³
  • PM10: 3.16 µg/m³
  • O3: 0.051 ppm
  • NO2: 5.9 ppb
  • SO2: 0.6 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.74 µg/m³
  • PM10: 2.18 µg/m³
  • O3: 0.052 ppm
  • NO2: 4.6 ppb
  • SO2: 0.4 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.47 µg/m³
  • PM10: 1.91 µg/m³
  • O3: 0.051 ppm
  • NO2: 4.5 ppb
  • SO2: 0.4 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.41 µg/m³
  • PM10: 1.9 µg/m³
  • O3: 0.049 ppm
  • NO2: 4 ppb
  • SO2: 0.3 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.33 µg/m³
  • PM10: 1.86 µg/m³
  • O3: 0.047 ppm
  • NO2: 3.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.16 µg/m³
  • PM10: 1.69 µg/m³
  • O3: 0.047 ppm
  • NO2: 2.9 ppb
  • SO2: 0.3 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.95 µg/m³
  • PM10: 1.41 µg/m³
  • O3: 0.047 ppm
  • NO2: 2.5 ppb
  • SO2: 0.3 ppb
  • CO: 0.15 ppm

Health Recommendations:

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