Hourly Weather | Today Wednesday, March 18, 2026
Hamilton, Ohio
5 AM
Cloudy Weather
25°
Feels Like 19°
7
Humidity: 64%
UV Index: 0
Wind: 6 mph
6 AM
Cloudy Weather
27°
Feels Like 19°
7
Humidity: 60%
UV Index: 0
Wind: 7 mph
7 AM
Cloudy Weather
27°
Feels Like 19°
11
Humidity: 55%
UV Index: 0
Wind: 7 mph
8 AM
Cloudy Weather
25°
Feels Like 18°
19
Humidity: 68%
UV Index: 0
Wind: 7 mph
9 AM
Cloudy Weather
25°
Feels Like 19°
19
Humidity: 64%
UV Index: 1
Wind: 8 mph
10 AM
Cloudy Weather
28°
Feels Like 21°
24
Humidity: 62%
UV Index: 1
Wind: 8 mph
11 AM
Snowy Weather
30°
Feels Like 21°
41
Humidity: 60%
UV Index: 1
Wind: 9 mph
12 PM
Rainy Weather
32°
Feels Like 25°
40
Humidity: 60%
UV Index: 1
Wind: 10 mph
1 PM
Cloudy Weather
36°
Feels Like 28°
37
Humidity: 59%
UV Index: 1
Wind: 10 mph
2 PM
Cloudy Weather
37°
Feels Like 30°
43
Humidity: 59%
UV Index: 1
Wind: 12 mph
3 PM
Cloudy Weather
39°
Feels Like 32°
47
Humidity: 59%
UV Index: 1
Wind: 12 mph
4 PM
Rainy Weather
39°
Feels Like 32°
51
Humidity: 60%
UV Index: 1
Wind: 10 mph
5 PM
Cloudy Weather
39°
Feels Like 34°
40
Humidity: 63%
UV Index: 1
Wind: 9 mph
6 PM
Cloudy Weather
41°
Feels Like 36°
34
Humidity: 63%
UV Index: 0
Wind: 8 mph
7 PM
Cloudy Weather
39°
Feels Like 36°
22
Humidity: 68%
UV Index: 0
Wind: 7 mph
8 PM
Cloudy Weather
37°
Feels Like 36°
0
Humidity: 74%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Weather
37°
Feels Like 34°
0
Humidity: 79%
UV Index: 0
Wind: 6 mph
10 PM
Cloudy Weather
37°
Feels Like 34°
0
Humidity: 82%
UV Index: 0
Wind: 6 mph
11 PM
Cloudy Weather
36°
Feels Like 34°
0
Humidity: 84%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

5 AM
43 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.55 µg/m³
  • PM10: 4.15 µg/m³
  • O3: 0.046 ppm
  • NO2: 1.7 ppb
  • SO2: 0.9 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

6 AM
44 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.73 µg/m³
  • PM10: 4.27 µg/m³
  • O3: 0.047 ppm
  • NO2: 1.5 ppb
  • SO2: 1.1 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

7 AM
44 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.85 µg/m³
  • PM10: 4.32 µg/m³
  • O3: 0.048 ppm
  • NO2: 1.3 ppb
  • SO2: 1.1 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.88 µg/m³
  • PM10: 4.33 µg/m³
  • O3: 0.048 ppm
  • NO2: 1.4 ppb
  • SO2: 1 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.59 µg/m³
  • PM10: 4.03 µg/m³
  • O3: 0.051 ppm
  • NO2: 1.5 ppb
  • SO2: 0.9 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.14 µg/m³
  • PM10: 3.58 µg/m³
  • O3: 0.052 ppm
  • NO2: 1.7 ppb
  • SO2: 0.8 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.73 µg/m³
  • PM10: 3.17 µg/m³
  • O3: 0.053 ppm
  • NO2: 1.5 ppb
  • SO2: 0.6 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.48 µg/m³
  • PM10: 2.95 µg/m³
  • O3: 0.054 ppm
  • NO2: 1.1 ppb
  • SO2: 0.5 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

1 PM
54 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.42 µg/m³
  • PM10: 2.9 µg/m³
  • O3: 0.055 ppm
  • NO2: 0.8 ppb
  • SO2: 0.4 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.45 µg/m³
  • PM10: 2.93 µg/m³
  • O3: 0.056 ppm
  • NO2: 0.6 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.61 µg/m³
  • PM10: 3.12 µg/m³
  • O3: 0.059 ppm
  • NO2: 0.5 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.83 µg/m³
  • PM10: 3.42 µg/m³
  • O3: 0.059 ppm
  • NO2: 0.6 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.2 µg/m³
  • PM10: 3.89 µg/m³
  • O3: 0.058 ppm
  • NO2: 0.7 ppb
  • SO2: 0.4 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.62 µg/m³
  • PM10: 4.43 µg/m³
  • O3: 0.057 ppm
  • NO2: 1.1 ppb
  • SO2: 0.5 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

7 PM
53 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.63 µg/m³
  • PM10: 4.49 µg/m³
  • O3: 0.055 ppm
  • NO2: 1.8 ppb
  • SO2: 0.5 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.63 µg/m³
  • PM10: 4.51 µg/m³
  • O3: 0.053 ppm
  • NO2: 2.3 ppb
  • SO2: 0.4 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.7 µg/m³
  • PM10: 4.57 µg/m³
  • O3: 0.052 ppm
  • NO2: 2.3 ppb
  • SO2: 0.4 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.95 µg/m³
  • PM10: 4.81 µg/m³
  • O3: 0.051 ppm
  • NO2: 2.2 ppb
  • SO2: 0.4 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.22 µg/m³
  • PM10: 5.06 µg/m³
  • O3: 0.051 ppm
  • NO2: 2.1 ppb
  • SO2: 0.4 ppb
  • CO: 0.14 ppm

Health Recommendations:

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