Hourly Weather | Today Friday, July 17, 2026
Active Weather Warnings
Dayton, Ohio
6 PM
Stormy Weather
82°
Feels Like 88°
69
Humidity: 73%
UV Index: 1
Wind: 6 mph
7 PM
Cloudy Weather
82°
Feels Like 90°
49
Humidity: 75%
UV Index: 1
Wind: 6 mph
8 PM
Cloudy Weather
81°
Feels Like 88°
43
Humidity: 80%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Weather
79°
Feels Like 84°
47
Humidity: 89%
UV Index: 0
Wind: 6 mph
10 PM
Stormy Weather
75°
Feels Like 81°
51
Humidity: 92%
UV Index: 0
Wind: 6 mph
11 PM
Cloudy Weather
75°
Feels Like 82°
40
Humidity: 94%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

6 PM
41 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 9.92 µg/m³
  • PM10: 10.18 µg/m³
  • O3: 0.044 ppm
  • NO2: 2.7 ppb
  • SO2: 1 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.23 µg/m³
  • PM10: 10.46 µg/m³
  • O3: 0.040 ppm
  • NO2: 3.5 ppb
  • SO2: 1.1 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.4 µg/m³
  • PM10: 10.62 µg/m³
  • O3: 0.036 ppm
  • NO2: 3.8 ppb
  • SO2: 1 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.34 µg/m³
  • PM10: 10.56 µg/m³
  • O3: 0.033 ppm
  • NO2: 3.7 ppb
  • SO2: 0.8 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.49 µg/m³
  • PM10: 10.71 µg/m³
  • O3: 0.031 ppm
  • NO2: 3.4 ppb
  • SO2: 0.6 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.74 µg/m³
  • PM10: 10.93 µg/m³
  • O3: 0.029 ppm
  • NO2: 3.1 ppb
  • SO2: 0.5 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

Weather Alerts and Warnings for Dayton

Air Quality Alert

Air Quality Alert issued July 17 at 12:43AM EDT by NWS Wilmington OH
Jul 17, 12:43 AM Jul 18, 12:00 AM
The Miami Valley Regional Planning Commission and the Regional Air
Pollution Control Agency have issued an Air Quality Alert for Clark,
Darke, Greene, Miami, Montgomery, Preble, and Shelby counties in the
Miami Valley Region, until midnight tonight.

Fine particulate levels are expected to be in the 'Unhealthy for
Sensitive Groups' range. Active children and adults, and people with
respiratory disease, such as asthma should limit prolonged outdoor
exposure.

For additional actions and information, visit miamivalleyair.org or
call 937-223-6323

Additionally, the Ohio Environmental Protection Agency has issued a
statewide Air Quality Advisory for the entire state of Ohio as smoke
from Canadian wildfires continues to adversely impact air quality.

Pollutants across the state are expected to range from the
'Unhealthy For Sensitive Groups' category in the southwest part of
the state to the 'Unhealthy' category in the rest of the state.
Hourly concentrations at times may reach the 'Very Unhealthy' to
'Hazardous' categories.

It is recommended, when possible, to avoid strenuous outdoor
activities, especially those with heart disease and respiratory
conditions like asthma. Watch for symptoms including wheezing,
coughing, chest tightness, dizziness, or burning in the nose,
throat, and eyes.

For additional information, please visit the Ohio Environmental
Protection Agency's website at epa.ohio.gov.
Updated: Jul 17, 5:08 PM Source: NWS Alert