Hourly Weather | Today Wednesday, March 18, 2026
Richland, Washington
8 AM
Cloudy Weather
57°
Feels Like 54°
0
Humidity: 53%
UV Index: 0
Wind: 10 mph
9 AM
Cloudy Weather
61°
Feels Like 57°
0
Humidity: 52%
UV Index: 1
Wind: 12 mph
10 AM
Cloudy Weather
63°
Feels Like 61°
0
Humidity: 50%
UV Index: 1
Wind: 12 mph
11 AM
Cloudy Weather
66°
Feels Like 64°
0
Humidity: 45%
UV Index: 2
Wind: 13 mph
12 PM
Cloudy Weather
70°
Feels Like 70°
0
Humidity: 38%
UV Index: 2
Wind: 14 mph
1 PM
Cloudy Weather
73°
Feels Like 72°
0
Humidity: 31%
UV Index: 2
Wind: 15 mph
2 PM
Cloudy Weather
75°
Feels Like 73°
0
Humidity: 28%
UV Index: 2
Wind: 15 mph
3 PM
Cloudy Weather
77°
Feels Like 75°
0
Humidity: 26%
UV Index: 1
Wind: 14 mph
4 PM
Cloudy Weather
75°
Feels Like 73°
0
Humidity: 27%
UV Index: 1
Wind: 13 mph
5 PM
Cloudy Weather
75°
Feels Like 72°
0
Humidity: 28%
UV Index: 1
Wind: 10 mph
6 PM
Cloudy Weather
73°
Feels Like 70°
0
Humidity: 30%
UV Index: 0
Wind: 9 mph
7 PM
Cloudy Weather
70°
Feels Like 66°
0
Humidity: 33%
UV Index: 0
Wind: 7 mph
8 PM
Cloudy Weather
66°
Feels Like 64°
0
Humidity: 36%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Weather
64°
Feels Like 63°
0
Humidity: 39%
UV Index: 0
Wind: 6 mph
10 PM
Cloudy Weather
64°
Feels Like 63°
0
Humidity: 40%
UV Index: 0
Wind: 7 mph
11 PM
Cloudy Weather
64°
Feels Like 63°
0
Humidity: 40%
UV Index: 0
Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 1.05 µg/m³
  • PM10: 1.34 µg/m³
  • O3: 0.041 ppm
  • NO2: 0.6 ppb
  • SO2: 0 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.01 µg/m³
  • PM10: 1.31 µg/m³
  • O3: 0.040 ppm
  • NO2: 0.7 ppb
  • SO2: 0 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.99 µg/m³
  • PM10: 1.31 µg/m³
  • O3: 0.041 ppm
  • NO2: 0.7 ppb
  • SO2: 0 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1 µg/m³
  • PM10: 1.35 µg/m³
  • O3: 0.043 ppm
  • NO2: 0.5 ppb
  • SO2: 0 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

12 PM
44 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.01 µg/m³
  • PM10: 1.38 µg/m³
  • O3: 0.047 ppm
  • NO2: 0.3 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

1 PM
44 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1 µg/m³
  • PM10: 1.39 µg/m³
  • O3: 0.048 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

2 PM
45 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.99 µg/m³
  • PM10: 1.39 µg/m³
  • O3: 0.048 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.95 µg/m³
  • PM10: 1.3 µg/m³
  • O3: 0.048 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.98 µg/m³
  • PM10: 1.3 µg/m³
  • O3: 0.047 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.02 µg/m³
  • PM10: 1.34 µg/m³
  • O3: 0.045 ppm
  • NO2: 0.3 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.08 µg/m³
  • PM10: 1.41 µg/m³
  • O3: 0.044 ppm
  • NO2: 0.5 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

7 PM
39 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.16 µg/m³
  • PM10: 1.52 µg/m³
  • O3: 0.042 ppm
  • NO2: 0.8 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.21 µg/m³
  • PM10: 1.6 µg/m³
  • O3: 0.040 ppm
  • NO2: 1 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.19 µg/m³
  • PM10: 1.59 µg/m³
  • O3: 0.038 ppm
  • NO2: 1 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.17 µg/m³
  • PM10: 1.59 µg/m³
  • O3: 0.037 ppm
  • NO2: 1.1 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.16 µg/m³
  • PM10: 1.6 µg/m³
  • O3: 0.036 ppm
  • NO2: 1.1 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

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