Hourly Weather | Today Wednesday, March 18, 2026
Auburn, Maine
8 AM
Cloudy Weather
18°
Feels Like
0
Frost Risk: 92%
Humidity: 45%
UV Index: 1
Wind: 12 mph
9 AM
Cloudy Weather
19°
Feels Like 10°
0
Humidity: 38%
UV Index: 2
Wind: 12 mph
10 AM
Cloudy Weather
23°
Feels Like 16°
0
Humidity: 33%
UV Index: 3
Wind: 11 mph
11 AM
Cloudy Weather
25°
Feels Like 19°
0
Humidity: 29%
UV Index: 3
Wind: 11 mph
12 PM
Cloudy Weather
27°
Feels Like 25°
0
Humidity: 26%
UV Index: 4
Wind: 9 mph
1 PM
Cloudy Weather
28°
Feels Like 28°
0
Humidity: 24%
UV Index: 4
Wind: 9 mph
2 PM
Cloudy Weather
30°
Feels Like 30°
0
Humidity: 23%
UV Index: 4
Wind: 8 mph
3 PM
Cloudy Weather
32°
Feels Like 32°
0
Humidity: 22%
UV Index: 3
Wind: 7 mph
4 PM
Cloudy Weather
32°
Feels Like 34°
0
Humidity: 21%
UV Index: 3
Wind: 7 mph
5 PM
Cloudy Weather
30°
Feels Like 30°
0
Humidity: 23%
UV Index: 2
Wind: 7 mph
6 PM
Cloudy Weather
30°
Feels Like 27°
0
Humidity: 26%
UV Index: 1
Wind: 6 mph
7 PM
Cloudy Night
28°
Feels Like 25°
0
Humidity: 33%
UV Index: 0
Wind: 6 mph
8 PM
Cloudy Night
27°
Feels Like 23°
0
Humidity: 41%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Night
25°
Feels Like 19°
0
Humidity: 48%
UV Index: 0
Wind: 6 mph
10 PM
Cloudy Night
23°
Feels Like 18°
0
Humidity: 56%
UV Index: 0
Wind: 6 mph
11 PM
Cloudy Night
21°
Feels Like 18°
0
Frost Risk: 92%
Humidity: 62%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.63 µg/m³
  • O3: 0.050 ppm
  • NO2: 1 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.64 µg/m³
  • O3: 0.049 ppm
  • NO2: 1.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.66 µg/m³
  • O3: 0.049 ppm
  • NO2: 1.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.51 µg/m³
  • PM10: 0.69 µg/m³
  • O3: 0.050 ppm
  • NO2: 1.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.55 µg/m³
  • PM10: 0.74 µg/m³
  • O3: 0.052 ppm
  • NO2: 1 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.6 µg/m³
  • PM10: 0.79 µg/m³
  • O3: 0.053 ppm
  • NO2: 0.9 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

2 PM
51 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.67 µg/m³
  • PM10: 0.87 µg/m³
  • O3: 0.054 ppm
  • NO2: 0.9 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

3 PM
55 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.75 µg/m³
  • PM10: 0.98 µg/m³
  • O3: 0.056 ppm
  • NO2: 1 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

4 PM
56 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.86 µg/m³
  • PM10: 1.18 µg/m³
  • O3: 0.056 ppm
  • NO2: 1.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

5 PM
55 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.03 µg/m³
  • PM10: 1.43 µg/m³
  • O3: 0.056 ppm
  • NO2: 1.6 ppb
  • SO2: 0.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

6 PM
52 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.34 µg/m³
  • PM10: 1.88 µg/m³
  • O3: 0.054 ppm
  • NO2: 2.6 ppb
  • SO2: 0.4 ppb
  • CO: 0.15 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

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

Pollutant Concentrations:

  • PM2.5: 1.86 µg/m³
  • PM10: 2.6 µg/m³
  • O3: 0.052 ppm
  • NO2: 4.1 ppb
  • SO2: 0.5 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.43 µg/m³
  • PM10: 3.41 µg/m³
  • O3: 0.050 ppm
  • NO2: 5.1 ppb
  • SO2: 0.6 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.05 µg/m³
  • PM10: 4.24 µg/m³
  • O3: 0.049 ppm
  • NO2: 5.5 ppb
  • SO2: 0.7 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.58 µg/m³
  • PM10: 4.96 µg/m³
  • O3: 0.048 ppm
  • NO2: 5.6 ppb
  • SO2: 0.8 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.13 µg/m³
  • PM10: 5.74 µg/m³
  • O3: 0.047 ppm
  • NO2: 5.8 ppb
  • SO2: 0.9 ppb
  • CO: 0.18 ppm

Health Recommendations:

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