Hourly Weather | Today Tuesday, July 21, 2026
Tracy, California
2 AM
Cloudy Night
73°
Feels Like 72°
0
Humidity: 43%
UV Index: 0
Wind: 5 mph
3 AM
Cloudy Night
72°
Feels Like 70°
0
Humidity: 48%
UV Index: 0
Wind: 5 mph
4 AM
Cloudy Night
72°
Feels Like 70°
0
Humidity: 51%
UV Index: 0
Wind: 5 mph
5 AM
Cloudy Night
70°
Feels Like 68°
0
Humidity: 53%
UV Index: 0
Wind: 5 mph
6 AM
Cloudy Weather
70°
Feels Like 66°
0
Humidity: 55%
UV Index: 0
Wind: 5 mph
7 AM
Cloudy Weather
72°
Feels Like 72°
0
Humidity: 50%
UV Index: 1
Wind: 5 mph
8 AM
Cloudy Weather
75°
Feels Like 77°
0
Humidity: 46%
UV Index: 2
Wind: 5 mph
9 AM
Cloudy Weather
81°
Feels Like 84°
0
Humidity: 37%
UV Index: 3
Wind: 5 mph
10 AM
Cloudy Weather
88°
Feels Like 91°
0
Humidity: 30%
UV Index: 5
Wind: 6 mph
11 AM
Cloudy Weather
91°
Feels Like 97°
0
Humidity: 24%
UV Index: 7
Wind: 7 mph
12 PM
Cloudy Weather
95°
Feels Like 100°
0
Humidity: 21%
UV Index: 10
Wind: 7 mph
1 PM
Cloudy Weather
99°
Feels Like 106°
0
Humidity: 20%
UV Index: 11
Wind: 8 mph
2 PM
Cloudy Weather
100°
Feels Like 106°
0
Humidity: 19%
UV Index: 10
Wind: 9 mph
3 PM
Cloudy Weather
102°
Feels Like 106°
0
Humidity: 19%
UV Index: 7
Wind: 10 mph
4 PM
Cloudy Weather
102°
Feels Like 104°
0
Humidity: 18%
UV Index: 5
Wind: 12 mph
5 PM
Cloudy Weather
100°
Feels Like 100°
0
Humidity: 19%
UV Index: 3
Wind: 13 mph
6 PM
Cloudy Weather
100°
Feels Like 99°
0
Humidity: 20%
UV Index: 2
Wind: 13 mph
7 PM
Cloudy Weather
97°
Feels Like 95°
0
Humidity: 21%
UV Index: 1
Wind: 12 mph
8 PM
Cloudy Weather
91°
Feels Like 88°
0
Humidity: 25%
UV Index: 0
Wind: 10 mph
9 PM
Cloudy Night
90°
Feels Like 86°
0
Humidity: 28%
UV Index: 0
Wind: 9 mph
10 PM
Cloudy Night
86°
Feels Like 82°
0
Humidity: 31%
UV Index: 0
Wind: 8 mph
11 PM
Cloudy Night
82°
Feels Like 81°
0
Humidity: 34%
UV Index: 0
Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

2 AM
29 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.72 µg/m³
  • PM10: 12.46 µg/m³
  • O3: 0.031 ppm
  • NO2: 2.3 ppb
  • SO2: 0.4 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

3 AM
28 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.8 µg/m³
  • PM10: 12.71 µg/m³
  • O3: 0.031 ppm
  • NO2: 2.3 ppb
  • SO2: 0.4 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

4 AM
28 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.91 µg/m³
  • PM10: 12.97 µg/m³
  • O3: 0.030 ppm
  • NO2: 2.3 ppb
  • SO2: 0.4 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

5 AM
27 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 6.03 µg/m³
  • PM10: 13.14 µg/m³
  • O3: 0.029 ppm
  • NO2: 2.3 ppb
  • SO2: 0.4 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

6 AM
26 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 6.19 µg/m³
  • PM10: 13.32 µg/m³
  • O3: 0.029 ppm
  • NO2: 2.4 ppb
  • SO2: 0.5 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

7 AM
26 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 6.34 µg/m³
  • PM10: 13.46 µg/m³
  • O3: 0.028 ppm
  • NO2: 2.8 ppb
  • SO2: 0.5 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

8 AM
26 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 6.32 µg/m³
  • PM10: 13.32 µg/m³
  • O3: 0.028 ppm
  • NO2: 3.3 ppb
  • SO2: 0.5 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.43 µg/m³
  • PM10: 13.17 µg/m³
  • O3: 0.028 ppm
  • NO2: 3.1 ppb
  • SO2: 0.5 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.73 µg/m³
  • PM10: 13.17 µg/m³
  • O3: 0.032 ppm
  • NO2: 2.6 ppb
  • SO2: 0.5 ppb
  • CO: 0.12 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: O3
Details

Pollutant Concentrations:

  • PM2.5: 8.05 µg/m³
  • PM10: 14.37 µg/m³
  • O3: 0.039 ppm
  • NO2: 1.9 ppb
  • SO2: 0.6 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.41 µg/m³
  • PM10: 13.93 µg/m³
  • O3: 0.051 ppm
  • NO2: 1 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
58 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 9.9 µg/m³
  • PM10: 15.11 µg/m³
  • O3: 0.057 ppm
  • NO2: 0.7 ppb
  • SO2: 0.6 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
73 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 10.82 µg/m³
  • PM10: 15.63 µg/m³
  • O3: 0.061 ppm
  • NO2: 0.5 ppb
  • SO2: 0.6 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
82 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 10.94 µg/m³
  • PM10: 15.27 µg/m³
  • O3: 0.064 ppm
  • NO2: 0.4 ppb
  • SO2: 0.5 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.

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

Pollutant Concentrations:

  • PM2.5: 10.81 µg/m³
  • PM10: 14.69 µg/m³
  • O3: 0.065 ppm
  • NO2: 0.4 ppb
  • SO2: 0.5 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.

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

Pollutant Concentrations:

  • PM2.5: 10.61 µg/m³
  • PM10: 14.1 µg/m³
  • O3: 0.066 ppm
  • NO2: 0.5 ppb
  • SO2: 0.5 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.

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

Pollutant Concentrations:

  • PM2.5: 10.61 µg/m³
  • PM10: 13.78 µg/m³
  • O3: 0.066 ppm
  • NO2: 0.6 ppb
  • SO2: 0.5 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.

7 PM
81 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 10.4 µg/m³
  • PM10: 13.37 µg/m³
  • O3: 0.064 ppm
  • NO2: 0.9 ppb
  • SO2: 0.5 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.

8 PM
70 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 9.84 µg/m³
  • PM10: 12.8 µg/m³
  • O3: 0.060 ppm
  • NO2: 1.1 ppb
  • SO2: 0.5 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.

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

Pollutant Concentrations:

  • PM2.5: 9.41 µg/m³
  • PM10: 12.51 µg/m³
  • O3: 0.056 ppm
  • NO2: 1.4 ppb
  • SO2: 0.5 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.

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

Pollutant Concentrations:

  • PM2.5: 9.47 µg/m³
  • PM10: 12.67 µg/m³
  • O3: 0.052 ppm
  • NO2: 1.6 ppb
  • SO2: 0.4 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.73 µg/m³
  • PM10: 12.96 µg/m³
  • O3: 0.050 ppm
  • NO2: 1.7 ppb
  • SO2: 0.4 ppb
  • CO: 0.11 ppm

Health Recommendations:

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