Hourly Weather | Today Wednesday, March 18, 2026
Fairfield, California
10 AM
Cloudy Weather
66°
Feels Like 70°
0
Humidity: 71%
UV Index: 3
Wind: 6 mph
11 AM
Cloudy Weather
73°
Feels Like 77°
0
Humidity: 60%
UV Index: 4
Wind: 7 mph
12 PM
Cloudy Weather
79°
Feels Like 82°
0
Humidity: 52%
UV Index: 5
Wind: 7 mph
1 PM
Cloudy Weather
81°
Feels Like 84°
0
Humidity: 46%
UV Index: 5
Wind: 7 mph
2 PM
Cloudy Weather
84°
Feels Like 88°
0
Humidity: 41%
UV Index: 5
Wind: 7 mph
3 PM
Cloudy Weather
88°
Feels Like 90°
0
Humidity: 37%
UV Index: 4
Wind: 6 mph
4 PM
Cloudy Weather
90°
Feels Like 91°
0
Humidity: 34%
UV Index: 3
Wind: 6 mph
5 PM
Cloudy Weather
88°
Feels Like 90°
0
Humidity: 36%
UV Index: 2
Wind: 6 mph
6 PM
Cloudy Weather
86°
Feels Like 84°
0
Humidity: 40%
UV Index: 1
Wind: 6 mph
7 PM
Cloudy Weather
81°
Feels Like 79°
0
Humidity: 49%
UV Index: 0
Wind: 5 mph
8 PM
Night
75°
Feels Like 73°
0
Humidity: 55%
UV Index: 0
Wind: 5 mph
9 PM
Night
73°
Feels Like 72°
0
Humidity: 62%
UV Index: 0
Wind: 6 mph
10 PM
Night
70°
Feels Like 66°
0
Humidity: 66%
UV Index: 0
Wind: 6 mph
11 PM
Night
66°
Feels Like 63°
0
Humidity: 74%
UV Index: 0
Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 8.17 µg/m³
  • PM10: 13.25 µg/m³
  • O3: 0.029 ppm
  • NO2: 5.2 ppb
  • SO2: 0.5 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.75 µg/m³
  • PM10: 14.24 µg/m³
  • O3: 0.031 ppm
  • NO2: 5.3 ppb
  • SO2: 0.5 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.32 µg/m³
  • PM10: 15.12 µg/m³
  • O3: 0.034 ppm
  • NO2: 5.2 ppb
  • SO2: 0.5 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.33 µg/m³
  • PM10: 16.18 µg/m³
  • O3: 0.039 ppm
  • NO2: 4.8 ppb
  • SO2: 0.6 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 11.94 µg/m³
  • PM10: 17.68 µg/m³
  • O3: 0.045 ppm
  • NO2: 4.2 ppb
  • SO2: 0.7 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 12.8 µg/m³
  • PM10: 18.22 µg/m³
  • O3: 0.051 ppm
  • NO2: 3.1 ppb
  • SO2: 0.7 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

4 PM
54 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 12.6 µg/m³
  • PM10: 17.79 µg/m³
  • O3: 0.055 ppm
  • NO2: 2.3 ppb
  • SO2: 0.6 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

5 PM
58 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 11.78 µg/m³
  • PM10: 16.81 µg/m³
  • O3: 0.057 ppm
  • NO2: 1.9 ppb
  • SO2: 0.6 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

6 PM
55 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 10.53 µg/m³
  • PM10: 15.41 µg/m³
  • O3: 0.056 ppm
  • NO2: 2.2 ppb
  • SO2: 0.5 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.

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

Pollutant Concentrations:

  • PM2.5: 9.17 µg/m³
  • PM10: 13.85 µg/m³
  • O3: 0.052 ppm
  • NO2: 3.1 ppb
  • SO2: 0.5 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.99 µg/m³
  • PM10: 12.42 µg/m³
  • O3: 0.049 ppm
  • NO2: 3.6 ppb
  • SO2: 0.5 ppb
  • CO: 0.13 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: O3
Details

Pollutant Concentrations:

  • PM2.5: 7.4 µg/m³
  • PM10: 11.63 µg/m³
  • O3: 0.046 ppm
  • NO2: 4.1 ppb
  • SO2: 0.5 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.11 µg/m³
  • PM10: 11.41 µg/m³
  • O3: 0.044 ppm
  • NO2: 4.7 ppb
  • SO2: 0.5 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.77 µg/m³
  • PM10: 11.33 µg/m³
  • O3: 0.041 ppm
  • NO2: 5 ppb
  • SO2: 0.5 ppb
  • CO: 0.14 ppm

Health Recommendations:

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