Hourly Weather | Today Tuesday, December 9, 2025
San Jose, California
7 PM
Cloudy Night
52°
Feels Like 52°
0
Humidity: 76%
Wind: 4 mph
UV Index: 0
8 PM
Cloudy Night
50°
Feels Like 52°
0
Humidity: 79%
Wind: 4 mph
UV Index: 0
9 PM
Cloudy Night
48°
Feels Like 50°
0
Humidity: 81%
Wind: 4 mph
UV Index: 0
10 PM
Cloudy Night
48°
Feels Like 48°
0
Humidity: 82%
Wind: 4 mph
UV Index: 0
11 PM
Cloudy Night
46°
Feels Like 48°
0
Humidity: 86%
Wind: 4 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 4.57 µg/m³
  • PM10: 10.69 µg/m³
  • O3: 0.038 ppm
  • NO2: 3.9 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
33 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.28 µg/m³
  • PM10: 11.72 µg/m³
  • O3: 0.036 ppm
  • NO2: 4.8 ppb
  • SO2: 0.5 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.39 µg/m³
  • PM10: 13.34 µg/m³
  • O3: 0.033 ppm
  • NO2: 6 ppb
  • SO2: 0.6 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

10 PM
32 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 7.64 µg/m³
  • PM10: 15.09 µg/m³
  • O3: 0.030 ppm
  • NO2: 7.4 ppb
  • SO2: 0.7 ppb
  • CO: 0.17 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: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 9.05 µg/m³
  • PM10: 17.02 µg/m³
  • O3: 0.028 ppm
  • NO2: 8.6 ppb
  • SO2: 0.7 ppb
  • CO: 0.19 ppm

Health Recommendations:

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