Hourly Weather | Today Wednesday, August 12, 2026
Active Weather Warnings
Richland, Washington
5 AM
Night
64°
Feels Like 64°
0
Humidity: 64%
UV Index: 0
Wind: 5 mph
6 AM
Sunny Weather
66°
Feels Like 63°
0
Humidity: 61%
UV Index: 0
Wind: 5 mph
7 AM
Sunny Weather
68°
Feels Like 66°
0
Humidity: 58%
UV Index: 1
Wind: 5 mph
8 AM
Cloudy Weather
70°
Feels Like 72°
0
Humidity: 51%
UV Index: 2
Wind: 6 mph
9 AM
Cloudy Weather
75°
Feels Like 79°
0
Humidity: 43%
UV Index: 3
Wind: 6 mph
10 AM
Cloudy Weather
81°
Feels Like 82°
0
Humidity: 38%
UV Index: 4
Wind: 6 mph
11 AM
Cloudy Weather
82°
Feels Like 88°
0
Humidity: 33%
UV Index: 5
Wind: 6 mph
12 PM
Cloudy Weather
84°
Feels Like 91°
0
Humidity: 30%
UV Index: 7
Wind: 5 mph
1 PM
Cloudy Weather
88°
Feels Like 93°
0
Humidity: 28%
UV Index: 7
Wind: 5 mph
2 PM
Cloudy Weather
88°
Feels Like 97°
0
Humidity: 26%
UV Index: 7
Wind: 5 mph
3 PM
Cloudy Weather
90°
Feels Like 95°
0
Humidity: 24%
UV Index: 5
Wind: 5 mph
4 PM
Cloudy Weather
91°
Feels Like 93°
0
Humidity: 24%
UV Index: 4
Wind: 5 mph
5 PM
Cloudy Weather
91°
Feels Like 93°
0
Humidity: 23%
UV Index: 3
Wind: 6 mph
6 PM
Cloudy Weather
90°
Feels Like 90°
0
Humidity: 25%
UV Index: 2
Wind: 6 mph
7 PM
Cloudy Weather
88°
Feels Like 88°
0
Humidity: 27%
UV Index: 1
Wind: 6 mph
8 PM
Sunny Weather
84°
Feels Like 82°
0
Humidity: 33%
UV Index: 0
Wind: 6 mph
9 PM
Night
82°
Feels Like 79°
0
Humidity: 37%
UV Index: 0
Wind: 7 mph
10 PM
Night
79°
Feels Like 75°
0
Humidity: 41%
UV Index: 0
Wind: 8 mph
11 PM
Night
75°
Feels Like 73°
0
Humidity: 46%
UV Index: 0
Wind: 8 mph

Hourly Air Quality Forecast - AQI (US EPA)

5 AM
170 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 93.7 µg/m³
  • PM10: 94.43 µg/m³
  • O3: 0.021 ppm
  • NO2: 2.5 ppb
  • SO2: 0.2 ppb
  • CO: 0.25 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

6 AM
170 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 92.45 µg/m³
  • PM10: 93.21 µg/m³
  • O3: 0.020 ppm
  • NO2: 2.6 ppb
  • SO2: 0.2 ppb
  • CO: 0.25 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

7 AM
168 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 89.15 µg/m³
  • PM10: 89.96 µg/m³
  • O3: 0.019 ppm
  • NO2: 2.8 ppb
  • SO2: 0.2 ppb
  • CO: 0.24 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

8 AM
165 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 83.78 µg/m³
  • PM10: 84.64 µg/m³
  • O3: 0.019 ppm
  • NO2: 2.8 ppb
  • SO2: 0.1 ppb
  • CO: 0.24 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

9 AM
156 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 66.94 µg/m³
  • PM10: 67.9 µg/m³
  • O3: 0.024 ppm
  • NO2: 1.9 ppb
  • SO2: 0.2 ppb
  • CO: 0.21 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

10 AM
148 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 54.55 µg/m³
  • PM10: 55.52 µg/m³
  • O3: 0.029 ppm
  • NO2: 1.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.19 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

11 AM
117 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 42.15 µg/m³
  • PM10: 43.13 µg/m³
  • O3: 0.034 ppm
  • NO2: 0.7 ppb
  • SO2: 0.2 ppb
  • CO: 0.16 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

12 PM
90 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 30.73 µg/m³
  • PM10: 31.47 µg/m³
  • O3: 0.038 ppm
  • NO2: 0.4 ppb
  • SO2: 0.1 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
75 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 23.85 µg/m³
  • PM10: 24.42 µg/m³
  • O3: 0.038 ppm
  • NO2: 0.3 ppb
  • SO2: 0.1 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.

2 PM
69 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 20.92 µg/m³
  • PM10: 21.42 µg/m³
  • O3: 0.040 ppm
  • NO2: 0.3 ppb
  • SO2: 0.1 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.

3 PM
65 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 19.08 µg/m³
  • PM10: 19.48 µg/m³
  • O3: 0.042 ppm
  • NO2: 0.3 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

4 PM
69 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 21.1 µg/m³
  • PM10: 21.39 µg/m³
  • O3: 0.046 ppm
  • NO2: 0.5 ppb
  • SO2: 0.1 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.

5 PM
104 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 37.18 µg/m³
  • PM10: 37.43 µg/m³
  • O3: 0.053 ppm
  • NO2: 0.8 ppb
  • SO2: 0.1 ppb
  • CO: 0.14 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

6 PM
164 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 81.48 µg/m³
  • PM10: 81.72 µg/m³
  • O3: 0.058 ppm
  • NO2: 2 ppb
  • SO2: 0.1 ppb
  • CO: 0.21 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

7 PM
195 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 140.9 µg/m³
  • PM10: 141.16 µg/m³
  • O3: 0.054 ppm
  • NO2: 4 ppb
  • SO2: 0.1 ppb
  • CO: 0.32 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

8 PM
224 AQI
Very unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 174.66 µg/m³
  • PM10: 174.97 µg/m³
  • O3: 0.044 ppm
  • NO2: 5.1 ppb
  • SO2: 0.1 ppb
  • CO: 0.37 ppm

Health Recommendations:

Health alert: the risk of health effects is increased for everyone.

9 PM
227 AQI
Very unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 177.53 µg/m³
  • PM10: 177.86 µg/m³
  • O3: 0.036 ppm
  • NO2: 5 ppb
  • SO2: 0.1 ppb
  • CO: 0.38 ppm

Health Recommendations:

Health alert: the risk of health effects is increased for everyone.

10 PM
218 AQI
Very unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 168.43 µg/m³
  • PM10: 168.79 µg/m³
  • O3: 0.031 ppm
  • NO2: 4.6 ppb
  • SO2: 0.1 ppb
  • CO: 0.37 ppm

Health Recommendations:

Health alert: the risk of health effects is increased for everyone.

11 PM
207 AQI
Very unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 156.94 µg/m³
  • PM10: 157.32 µg/m³
  • O3: 0.028 ppm
  • NO2: 4.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.35 ppm

Health Recommendations:

Health alert: the risk of health effects is increased for everyone.

Weather Alerts and Warnings for Richland

Air Quality Alert

Air Quality Alert issued August 5 at 2:33PM PDT by NWS Pendleton OR
Aug 5, 2:33 PM Aug 12, 5:00 AM
The Washington State Department of Ecology, Benton Clean Air Agency,
and the Yakima Regional Clean Air Agency have issued an Air Quality
Alert until further notice.

For the Smoke Air Quality Alert, wildfires burning in the region
combined with forecasted conditions will cause air quality to reach
unhealthy levels.

Pollutants in smoke can cause burning eyes, runny nose, aggravate
heart and lung diseases, and aggravate other serious health
problems. Limit outdoor activities and keep children indoors if it
is smoky. Please follow medical advice if you have a heart or lung
condition.

Information from the Washington Department of Ecology web site is
available at http://www.ecy.wa.gov/air.html or call 360-407-6000.
Information from the Yakima Regional Clean Air Agency web site is
available at http://www.yakimacleanair.org or call 509-834-2050.
Information from the Benton County Clean Air Agency web site is
available at http://www.bentoncleanair.org or call 509-783-1304.
Updated: Aug 12, 3:47 AM Source: NWS Alert