Hourly Weather | Today Wednesday, March 18, 2026
Tracy, California
10 AM
Cloudy Weather
70°
Feels Like 73°
0
Humidity: 68%
UV Index: 3
Wind: 5 mph
11 AM
Cloudy Weather
75°
Feels Like 81°
0
Humidity: 62%
UV Index: 4
Wind: 5 mph
12 PM
Cloudy Weather
79°
Feels Like 86°
0
Humidity: 55%
UV Index: 5
Wind: 5 mph
1 PM
Cloudy Weather
82°
Feels Like 90°
0
Humidity: 51%
UV Index: 5
Wind: 6 mph
2 PM
Cloudy Weather
84°
Feels Like 91°
0
Humidity: 48%
UV Index: 5
Wind: 6 mph
3 PM
Cloudy Weather
88°
Feels Like 91°
0
Humidity: 45%
UV Index: 4
Wind: 6 mph
4 PM
Cloudy Weather
88°
Feels Like 91°
0
Humidity: 43%
UV Index: 3
Wind: 6 mph
5 PM
Cloudy Weather
88°
Feels Like 88°
0
Humidity: 44%
UV Index: 2
Wind: 6 mph
6 PM
Cloudy Weather
84°
Feels Like 86°
0
Humidity: 47%
UV Index: 1
Wind: 6 mph
7 PM
Cloudy Weather
82°
Feels Like 81°
0
Humidity: 55%
UV Index: 0
Wind: 6 mph
8 PM
Night
81°
Feels Like 81°
0
Humidity: 58%
UV Index: 0
Wind: 6 mph
9 PM
Night
77°
Feels Like 75°
0
Humidity: 63%
UV Index: 0
Wind: 6 mph
10 PM
Night
73°
Feels Like 73°
0
Humidity: 67%
UV Index: 0
Wind: 6 mph
11 PM
Night
72°
Feels Like 70°
0
Humidity: 71%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

10 AM
68 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 20.25 µg/m³
  • PM10: 27.68 µg/m³
  • O3: 0.027 ppm
  • NO2: 5.7 ppb
  • SO2: 0.4 ppb
  • CO: 0.25 ppm

Health Recommendations:

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

11 AM
69 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 21.03 µg/m³
  • PM10: 28.37 µg/m³
  • O3: 0.032 ppm
  • NO2: 5.3 ppb
  • SO2: 0.4 ppb
  • CO: 0.24 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 20.97 µg/m³
  • PM10: 28.02 µg/m³
  • O3: 0.046 ppm
  • NO2: 3.9 ppb
  • SO2: 0.6 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

1 PM
73 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 22.89 µg/m³
  • PM10: 30.3 µg/m³
  • O3: 0.052 ppm
  • NO2: 3.4 ppb
  • SO2: 0.6 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 24.95 µg/m³
  • PM10: 32.86 µg/m³
  • O3: 0.056 ppm
  • NO2: 3.3 ppb
  • SO2: 0.6 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 25.61 µg/m³
  • PM10: 33.2 µg/m³
  • O3: 0.061 ppm
  • NO2: 2.8 ppb
  • SO2: 0.8 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 26.5 µg/m³
  • PM10: 33.96 µg/m³
  • O3: 0.066 ppm
  • NO2: 2.3 ppb
  • SO2: 1 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 26.61 µg/m³
  • PM10: 33.88 µg/m³
  • O3: 0.070 ppm
  • NO2: 2 ppb
  • SO2: 1 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 25.69 µg/m³
  • PM10: 32.75 µg/m³
  • O3: 0.069 ppm
  • NO2: 2.3 ppb
  • SO2: 0.9 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 23.92 µg/m³
  • PM10: 30.72 µg/m³
  • O3: 0.064 ppm
  • NO2: 3.1 ppb
  • SO2: 0.8 ppb
  • CO: 0.18 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: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 21.59 µg/m³
  • PM10: 28.08 µg/m³
  • O3: 0.058 ppm
  • NO2: 3.6 ppb
  • SO2: 0.7 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

9 PM
67 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 19.84 µg/m³
  • PM10: 26 µg/m³
  • O3: 0.053 ppm
  • NO2: 4 ppb
  • SO2: 0.6 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 18.94 µg/m³
  • PM10: 24.91 µg/m³
  • O3: 0.050 ppm
  • NO2: 4.5 ppb
  • SO2: 0.7 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

11 PM
64 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 18.45 µg/m³
  • PM10: 24.37 µg/m³
  • O3: 0.047 ppm
  • NO2: 4.9 ppb
  • SO2: 0.7 ppb
  • CO: 0.19 ppm

Health Recommendations:

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