Hourly Weather | Today Tuesday, July 21, 2026
Hamilton, Ohio
7 AM
Stormy Weather
73°
Feels Like 75°
51
Humidity: 91%
UV Index: 0
Wind: 6 mph
8 AM
Cloudy Weather
75°
Feels Like 81°
40
Humidity: 88%
UV Index: 1
Wind: 6 mph
9 AM
Cloudy Weather
77°
Feels Like 82°
34
Humidity: 86%
UV Index: 1
Wind: 6 mph
10 AM
Cloudy Weather
79°
Feels Like 86°
40
Humidity: 85%
UV Index: 2
Wind: 7 mph
11 AM
Stormy Weather
79°
Feels Like 82°
74
Humidity: 85%
UV Index: 1
Wind: 7 mph
12 PM
Cloudy Weather
81°
Feels Like 91°
49
Humidity: 83%
UV Index: 3
Wind: 7 mph
1 PM
Stormy Weather
81°
Feels Like 88°
74
Humidity: 82%
UV Index: 2
Wind: 7 mph
2 PM
Cloudy Weather
81°
Feels Like 95°
49
Humidity: 80%
UV Index: 5
Wind: 7 mph
3 PM
Cloudy Weather
82°
Feels Like 97°
49
Humidity: 75%
UV Index: 6
Wind: 7 mph
4 PM
Stormy Weather
81°
Feels Like 88°
65
Humidity: 86%
UV Index: 1
Wind: 8 mph
5 PM
Cloudy Weather
88°
Feels Like 97°
49
Humidity: 65%
UV Index: 3
Wind: 8 mph
6 PM
Stormy Weather
84°
Feels Like 90°
60
Humidity: 76%
UV Index: 1
Wind: 7 mph
7 PM
Cloudy Weather
82°
Feels Like 90°
49
Humidity: 73%
UV Index: 1
Wind: 7 mph
8 PM
Sunny with a Chance of Thunderstorms
81°
Feels Like 84°
51
Humidity: 82%
UV Index: 0
Wind: 7 mph
9 PM
Cloudy Weather
79°
Feels Like 82°
47
Humidity: 80%
UV Index: 0
Wind: 7 mph
10 PM
Cloudy Night
77°
Feels Like 81°
40
Humidity: 82%
UV Index: 0
Wind: 6 mph
11 PM
Cloudy Night
75°
Feels Like 79°
34
Humidity: 85%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

7 AM
65 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 19.24 µg/m³
  • PM10: 19.89 µg/m³
  • O3: 0.026 ppm
  • NO2: 1.6 ppb
  • SO2: 1 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.

8 AM
63 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 18.28 µg/m³
  • PM10: 18.92 µg/m³
  • O3: 0.024 ppm
  • NO2: 2.3 ppb
  • SO2: 1 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.

9 AM
60 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 16.68 µg/m³
  • PM10: 17.2 µg/m³
  • O3: 0.024 ppm
  • NO2: 2.8 ppb
  • SO2: 1.3 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.

10 AM
55 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 14.57 µg/m³
  • PM10: 14.9 µg/m³
  • O3: 0.023 ppm
  • NO2: 2.7 ppb
  • SO2: 1.2 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.

11 AM
51 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 12.37 µg/m³
  • PM10: 12.59 µg/m³
  • O3: 0.025 ppm
  • NO2: 2.2 ppb
  • SO2: 1 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

12 PM
44 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 10.54 µg/m³
  • PM10: 10.71 µg/m³
  • O3: 0.029 ppm
  • NO2: 1.9 ppb
  • SO2: 0.9 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

1 PM
39 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 9.33 µg/m³
  • PM10: 9.5 µg/m³
  • O3: 0.031 ppm
  • NO2: 1.6 ppb
  • SO2: 0.9 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

2 PM
36 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 8.52 µg/m³
  • PM10: 8.7 µg/m³
  • O3: 0.034 ppm
  • NO2: 1.4 ppb
  • SO2: 0.9 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.28 µg/m³
  • PM10: 7.42 µg/m³
  • O3: 0.036 ppm
  • NO2: 1.2 ppb
  • SO2: 0.8 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.29 µg/m³
  • PM10: 6.4 µg/m³
  • O3: 0.036 ppm
  • NO2: 1.3 ppb
  • SO2: 0.7 ppb
  • CO: 0.10 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: 5.99 µg/m³
  • PM10: 6.08 µg/m³
  • O3: 0.035 ppm
  • NO2: 1.7 ppb
  • SO2: 0.7 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.37 µg/m³
  • PM10: 6.45 µg/m³
  • O3: 0.034 ppm
  • NO2: 2 ppb
  • SO2: 0.8 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: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 7.45 µg/m³
  • PM10: 7.53 µg/m³
  • O3: 0.033 ppm
  • NO2: 2.2 ppb
  • SO2: 0.8 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

8 PM
35 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 8.44 µg/m³
  • PM10: 8.54 µg/m³
  • O3: 0.032 ppm
  • NO2: 2.3 ppb
  • SO2: 0.8 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

9 PM
37 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 8.79 µg/m³
  • PM10: 8.91 µg/m³
  • O3: 0.030 ppm
  • NO2: 2.3 ppb
  • SO2: 0.7 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

10 PM
37 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 8.83 µg/m³
  • PM10: 8.96 µg/m³
  • O3: 0.027 ppm
  • NO2: 2.3 ppb
  • SO2: 0.6 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

11 PM
37 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 8.8 µg/m³
  • PM10: 8.94 µg/m³
  • O3: 0.024 ppm
  • NO2: 2.3 ppb
  • SO2: 0.6 ppb
  • CO: 0.11 ppm

Health Recommendations:

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