Hourly Weather | Today Wednesday, August 12, 2026
Active Weather Warnings
Hamilton, Ohio
9 AM
Stormy Weather
72°
Feels Like 72°
84
Humidity: 97%
UV Index: 1
Wind: 7 mph
10 AM
Stormy Weather
73°
Feels Like 73°
90
Humidity: 90%
UV Index: 1
Wind: 8 mph
11 AM
Stormy Weather
79°
Feels Like 79°
85
Humidity: 82%
UV Index: 1
Wind: 8 mph
12 PM
Stormy Weather
79°
Feels Like 82°
85
Humidity: 85%
UV Index: 2
Wind: 9 mph
1 PM
Stormy Weather
79°
Feels Like 84°
85
Humidity: 92%
UV Index: 2
Wind: 9 mph
2 PM
Sunny with a Chance of Thunderstorms
79°
Feels Like 88°
61
Humidity: 90%
UV Index: 3
Wind: 9 mph
3 PM
Cloudy Weather
82°
Feels Like 93°
49
Humidity: 76%
UV Index: 5
Wind: 9 mph
4 PM
Cloudy Weather
88°
Feels Like 99°
49
Humidity: 67%
UV Index: 4
Wind: 9 mph
5 PM
Sunny with a Chance of Thunderstorms
84°
Feels Like 91°
63
Humidity: 80%
UV Index: 1
Wind: 8 mph
6 PM
Cloudy Weather
82°
Feels Like 90°
49
Humidity: 79%
UV Index: 1
Wind: 8 mph
7 PM
Cloudy Weather
81°
Feels Like 88°
44
Humidity: 81%
UV Index: 1
Wind: 8 mph
8 PM
Cloudy Weather
79°
Feels Like 84°
34
Humidity: 84%
UV Index: 0
Wind: 7 mph
9 PM
Cloudy Night
77°
Feels Like 82°
34
Humidity: 88%
UV Index: 0
Wind: 7 mph
10 PM
Cloudy Night
75°
Feels Like 79°
40
Humidity: 90%
UV Index: 0
Wind: 7 mph
11 PM
Stormy Weather
73°
Feels Like 75°
54
Humidity: 91%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

9 AM
23 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 5.58 µg/m³
  • PM10: 5.7 µg/m³
  • O3: 0.016 ppm
  • NO2: 2.1 ppb
  • SO2: 0.5 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

10 AM
23 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 5.56 µg/m³
  • PM10: 5.67 µg/m³
  • O3: 0.017 ppm
  • NO2: 1.9 ppb
  • SO2: 0.5 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

11 AM
24 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 5.87 µg/m³
  • PM10: 5.96 µg/m³
  • O3: 0.020 ppm
  • NO2: 1.6 ppb
  • SO2: 0.6 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.45 µg/m³
  • PM10: 6.57 µg/m³
  • O3: 0.023 ppm
  • NO2: 1.5 ppb
  • SO2: 0.6 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: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 6.84 µg/m³
  • PM10: 6.99 µg/m³
  • O3: 0.026 ppm
  • NO2: 1.2 ppb
  • SO2: 0.6 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.34 µg/m³
  • PM10: 7.52 µg/m³
  • O3: 0.030 ppm
  • NO2: 0.9 ppb
  • SO2: 0.5 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: 7.56 µg/m³
  • PM10: 7.77 µg/m³
  • O3: 0.035 ppm
  • NO2: 0.8 ppb
  • SO2: 0.6 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.63 µg/m³
  • PM10: 7.87 µg/m³
  • O3: 0.038 ppm
  • NO2: 0.8 ppb
  • SO2: 0.6 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.92 µg/m³
  • PM10: 8.18 µg/m³
  • O3: 0.040 ppm
  • NO2: 1 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
39 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 8.69 µg/m³
  • PM10: 8.99 µg/m³
  • O3: 0.042 ppm
  • NO2: 1.1 ppb
  • SO2: 0.9 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

7 PM
40 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 9.63 µg/m³
  • PM10: 9.98 µg/m³
  • O3: 0.042 ppm
  • NO2: 1.6 ppb
  • SO2: 1 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.37 µg/m³
  • PM10: 10.79 µg/m³
  • O3: 0.039 ppm
  • NO2: 2 ppb
  • SO2: 1.1 ppb
  • CO: 0.11 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: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 10.89 µg/m³
  • PM10: 11.35 µg/m³
  • O3: 0.036 ppm
  • NO2: 2.2 ppb
  • SO2: 1.1 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 11.39 µg/m³
  • PM10: 11.89 µg/m³
  • O3: 0.033 ppm
  • NO2: 2.2 ppb
  • SO2: 1 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 11.79 µg/m³
  • PM10: 12.34 µg/m³
  • O3: 0.029 ppm
  • NO2: 2.3 ppb
  • SO2: 0.9 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 Hamilton

Severe Future Possible

Flood Watch

Flood Watch issued August 11 at 11:33PM EDT until August 12 at 11:00PM EDT by NWS Wilmington OH
Aug 11, 11:33 PM Aug 12, 11:00 PM
WHAT: Flash flooding caused by excessive rainfall continues to be
possible.

WHERE: Portions of Indiana, including the following counties,
Dearborn, Fayette, Franklin, Ohio, Ripley, Switzerland, Union and
Wayne, Kentucky, including the following counties, Boone, Bracken,
Campbell, Carroll, Gallatin, Grant, Kenton, Lewis, Mason, Owen,
Pendleton and Robertson, and Ohio, including the following
counties, Adams, Auglaize, Brown, Butler, Champaign, Clark,
Clermont, Clinton, Darke, Delaware, Fairfield, Fayette, Franklin,
Greene, Hamilton, Hardin, Highland, Hocking, Licking, Logan,
Madison, Mercer, Miami, Montgomery, Pickaway, Pike, Preble, Ross,
Scioto, Shelby, Union and Warren.

WHEN: Through Wednesday evening.

IMPACTS: Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.

ADDITIONAL DETAILS:
- Additional thunderstorms are expected through Wednesday. Locally
heavy rainfall and the potential for storms to repeatedly track
over the same areas are possible. This will result in the
potential for flash flooding.
+ Read More
People in the watch area should keep an eye on the weather and be prepared for immediate action should heavy rains and flooding occur or a Flash Flood Warning be issued. Avoid low-lying areas and be careful when approaching highway dips and underpasses. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.
Updated: Aug 12, 8:19 AM Source: NWS Alert