Hourly Weather | Today Monday, April 6, 2026
San Jose, California
5 AM
Cloudy Night
54°
Feels Like 54°
0
Humidity: 84%
UV Index: 0
Wind: 4 mph
6 AM
Cloudy Night
54°
Feels Like 54°
0
Humidity: 83%
UV Index: 0
Wind: 4 mph
7 AM
Cloudy Weather
54°
Feels Like 54°
0
Humidity: 86%
UV Index: 0
Wind: 4 mph
8 AM
Cloudy Weather
55°
Feels Like 57°
0
Humidity: 81%
UV Index: 1
Wind: 4 mph
9 AM
Cloudy Weather
57°
Feels Like 63°
0
Humidity: 78%
UV Index: 2
Wind: 5 mph
10 AM
Cloudy Weather
61°
Feels Like 66°
0
Humidity: 70%
UV Index: 4
Wind: 6 mph
11 AM
Cloudy Weather
63°
Feels Like 70°
0
Humidity: 64%
UV Index: 5
Wind: 7 mph
12 PM
Cloudy Weather
64°
Feels Like 72°
0
Humidity: 58%
UV Index: 7
Wind: 8 mph
1 PM
Cloudy Weather
68°
Feels Like 73°
0
Humidity: 53%
UV Index: 7
Wind: 9 mph
2 PM
Cloudy Weather
70°
Feels Like 75°
0
Humidity: 48%
UV Index: 7
Wind: 10 mph
3 PM
Cloudy Weather
72°
Feels Like 73°
0
Humidity: 46%
UV Index: 5
Wind: 12 mph
4 PM
Cloudy Weather
70°
Feels Like 72°
0
Humidity: 49%
UV Index: 4
Wind: 12 mph
5 PM
Cloudy Weather
68°
Feels Like 66°
0
Humidity: 51%
UV Index: 2
Wind: 13 mph
6 PM
Cloudy Weather
66°
Feels Like 64°
0
Humidity: 55%
UV Index: 1
Wind: 12 mph
7 PM
Cloudy Weather
63°
Feels Like 59°
0
Humidity: 60%
UV Index: 0
Wind: 12 mph
8 PM
Cloudy Night
61°
Feels Like 55°
0
Humidity: 66%
UV Index: 0
Wind: 10 mph
9 PM
Cloudy Night
57°
Feels Like 54°
0
Humidity: 72%
UV Index: 0
Wind: 9 mph
10 PM
Cloudy Night
55°
Feels Like 54°
0
Humidity: 75%
UV Index: 0
Wind: 8 mph
11 PM
Cloudy Night
55°
Feels Like 54°
0
Humidity: 76%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 4.96 µg/m³
  • PM10: 13.78 µg/m³
  • O3: 0.053 ppm
  • NO2: 0.5 ppb
  • SO2: 0.5 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

6 AM
49 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.89 µg/m³
  • PM10: 13.78 µg/m³
  • O3: 0.053 ppm
  • NO2: 0.4 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
49 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.9 µg/m³
  • PM10: 13.97 µg/m³
  • O3: 0.053 ppm
  • NO2: 0.4 ppb
  • SO2: 0.5 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.95 µg/m³
  • PM10: 14.23 µg/m³
  • O3: 0.052 ppm
  • NO2: 0.5 ppb
  • SO2: 0.5 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.02 µg/m³
  • PM10: 14.42 µg/m³
  • O3: 0.052 ppm
  • NO2: 0.5 ppb
  • SO2: 0.5 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.09 µg/m³
  • PM10: 14.57 µg/m³
  • O3: 0.052 ppm
  • NO2: 0.5 ppb
  • SO2: 0.5 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.14 µg/m³
  • PM10: 14.61 µg/m³
  • O3: 0.053 ppm
  • NO2: 0.4 ppb
  • SO2: 0.5 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.14 µg/m³
  • PM10: 14.49 µg/m³
  • O3: 0.054 ppm
  • NO2: 0.3 ppb
  • SO2: 0.4 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

1 PM
52 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.13 µg/m³
  • PM10: 14.31 µg/m³
  • O3: 0.055 ppm
  • NO2: 0.2 ppb
  • SO2: 0.4 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
54 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.11 µg/m³
  • PM10: 14.09 µg/m³
  • O3: 0.055 ppm
  • NO2: 0.2 ppb
  • SO2: 0.4 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
53 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.98 µg/m³
  • PM10: 13.71 µg/m³
  • O3: 0.055 ppm
  • NO2: 0.2 ppb
  • SO2: 0.4 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
52 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.78 µg/m³
  • PM10: 13.18 µg/m³
  • O3: 0.055 ppm
  • NO2: 0.2 ppb
  • SO2: 0.4 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.

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

Pollutant Concentrations:

  • PM2.5: 4.53 µg/m³
  • PM10: 12.61 µg/m³
  • O3: 0.054 ppm
  • NO2: 0.2 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 PM
49 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.21 µg/m³
  • PM10: 11.86 µg/m³
  • O3: 0.053 ppm
  • NO2: 0.2 ppb
  • SO2: 0.4 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.82 µg/m³
  • PM10: 10.92 µg/m³
  • O3: 0.052 ppm
  • NO2: 0.2 ppb
  • SO2: 0.4 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.43 µg/m³
  • PM10: 9.97 µg/m³
  • O3: 0.051 ppm
  • NO2: 0.3 ppb
  • SO2: 0.4 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.13 µg/m³
  • PM10: 9.18 µg/m³
  • O3: 0.051 ppm
  • NO2: 0.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.91 µg/m³
  • PM10: 8.59 µg/m³
  • O3: 0.050 ppm
  • NO2: 0.3 ppb
  • SO2: 0.3 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: 2.75 µg/m³
  • PM10: 8.14 µg/m³
  • O3: 0.050 ppm
  • NO2: 0.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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