Hourly Weather | Today Friday, September 19, 2025
Santa Clara, California
1 AM
Night
64°
Feels Like 63°
0
Humidity: 80%
Wind: 5 mph
UV Index: 0
2 AM
Night
64°
Feels Like 64°
0
Humidity: 81%
Wind: 5 mph
UV Index: 0
3 AM
Cloudy Night
64°
Feels Like 64°
0
Humidity: 82%
Wind: 4 mph
UV Index: 0
4 AM
Cloudy Night
64°
Feels Like 64°
0
Humidity: 82%
Wind: 4 mph
UV Index: 0
5 AM
Cloudy Night
64°
Feels Like 64°
0
Humidity: 82%
Wind: 4 mph
UV Index: 0
6 AM
Cloudy Night
63°
Feels Like 64°
0
Humidity: 82%
Wind: 4 mph
UV Index: 0
7 AM
Cloudy Weather
63°
Feels Like 63°
0
Humidity: 86%
Wind: 2 mph
UV Index: 0
8 AM
Cloudy Weather
64°
Feels Like 66°
0
Humidity: 79%
Wind: 2 mph
UV Index: 10
9 AM
Cloudy Weather
68°
Feels Like 70°
0
Humidity: 73%
Wind: 4 mph
UV Index: 20
10 AM
Cloudy Weather
72°
Feels Like 75°
0
Humidity: 67%
Wind: 5 mph
UV Index: 30
11 AM
Cloudy Weather
73°
Feels Like 79°
0
Humidity: 62%
Wind: 6 mph
UV Index: 42
12 PM
Cloudy Weather
77°
Feels Like 81°
0
Humidity: 56%
Wind: 7 mph
UV Index: 51
1 PM
Cloudy Weather
81°
Feels Like 82°
0
Humidity: 51%
Wind: 9 mph
UV Index: 57
2 PM
Cloudy Weather
82°
Feels Like 84°
0
Humidity: 46%
Wind: 10 mph
UV Index: 51
3 PM
Cloudy Weather
84°
Feels Like 84°
0
Humidity: 44%
Wind: 10 mph
UV Index: 42
4 PM
Sunny Weather
82°
Feels Like 82°
0
Humidity: 46%
Wind: 12 mph
UV Index: 30
5 PM
Sunny Weather
81°
Feels Like 79°
0
Humidity: 48%
Wind: 12 mph
UV Index: 20
6 PM
Sunny Weather
77°
Feels Like 75°
0
Humidity: 53%
Wind: 10 mph
UV Index: 10
7 PM
Sunny Weather
73°
Feels Like 72°
0
Humidity: 58%
Wind: 9 mph
UV Index: 0
8 PM
Night
72°
Feels Like 70°
0
Humidity: 65%
Wind: 8 mph
UV Index: 0
9 PM
Night
70°
Feels Like 66°
0
Humidity: 68%
Wind: 7 mph
UV Index: 0
10 PM
Night
66°
Feels Like 64°
0
Humidity: 73%
Wind: 6 mph
UV Index: 0
11 PM
Night
66°
Feels Like 64°
0
Humidity: 74%
Wind: 5 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

1 AM
51 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 11.69 µg/m³
  • PM10: 17.61 µg/m³
  • O₃: 20.74 ppb
  • NO₂: 10.46 ppb
  • SO₂: 1.24 ppb
  • CO: 174.00 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

2 AM
51 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 11.49 µg/m³
  • PM10: 16.85 µg/m³
  • O₃: 19.60 ppb
  • NO₂: 9.83 ppb
  • SO₂: 1.22 ppb
  • CO: 169.27 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

3 AM
51 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 11.72 µg/m³
  • PM10: 14.90 µg/m³
  • O₃: 17.38 ppb
  • NO₂: 8.18 ppb
  • SO₂: 1.24 ppb
  • CO: 155.46 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

4 AM
51 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 11.36 µg/m³
  • PM10: 14.64 µg/m³
  • O₃: 17.92 ppb
  • NO₂: 7.35 ppb
  • SO₂: 1.21 ppb
  • CO: 149.51 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

5 AM
52 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 10.65 µg/m³
  • PM10: 13.90 µg/m³
  • O₃: 18.46 ppb
  • NO₂: 6.53 ppb
  • SO₂: 1.18 ppb
  • CO: 143.56 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

6 AM
52 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 9.95 µg/m³
  • PM10: 13.07 µg/m³
  • O₃: 20.27 ppb
  • NO₂: 6.31 ppb
  • SO₂: 1.13 ppb
  • CO: 141.38 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

7 AM
52 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 9.44 µg/m³
  • PM10: 12.62 µg/m³
  • O₃: 22.08 ppb
  • NO₂: 6.10 ppb
  • SO₂: 1.08 ppb
  • CO: 139.21 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

8 AM
52 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 9.02 µg/m³
  • PM10: 12.09 µg/m³
  • O₃: 23.89 ppb
  • NO₂: 5.89 ppb
  • SO₂: 1.04 ppb
  • CO: 137.04 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

9 AM
52 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 9.03 µg/m³
  • PM10: 12.21 µg/m³
  • O₃: 27.43 ppb
  • NO₂: 5.02 ppb
  • SO₂: 0.99 ppb
  • CO: 132.08 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

10 AM
52 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 8.78 µg/m³
  • PM10: 12.01 µg/m³
  • O₃: 30.98 ppb
  • NO₂: 4.15 ppb
  • SO₂: 0.95 ppb
  • CO: 127.12 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

11 AM
52 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 8.62 µg/m³
  • PM10: 11.87 µg/m³
  • O₃: 34.53 ppb
  • NO₂: 3.28 ppb
  • SO₂: 0.91 ppb
  • CO: 122.16 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

12 PM
52 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 8.90 µg/m³
  • PM10: 12.32 µg/m³
  • O₃: 37.74 ppb
  • NO₂: 2.72 ppb
  • SO₂: 0.84 ppb
  • CO: 119.32 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

1 PM
52 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 9.41 µg/m³
  • PM10: 12.98 µg/m³
  • O₃: 40.94 ppb
  • NO₂: 2.15 ppb
  • SO₂: 0.76 ppb
  • CO: 116.49 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

2 PM
52 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 9.33 µg/m³
  • PM10: 12.75 µg/m³
  • O₃: 44.15 ppb
  • NO₂: 1.59 ppb
  • SO₂: 0.69 ppb
  • CO: 113.65 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

3 PM
52 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 9.16 µg/m³
  • PM10: 12.31 µg/m³
  • O₃: 44.13 ppb
  • NO₂: 1.76 ppb
  • SO₂: 0.66 ppb
  • CO: 115.19 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

4 PM
52 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 9.12 µg/m³
  • PM10: 12.10 µg/m³
  • O₃: 44.12 ppb
  • NO₂: 1.93 ppb
  • SO₂: 0.64 ppb
  • CO: 116.73 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

5 PM
52 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 9.30 µg/m³
  • PM10: 12.20 µg/m³
  • O₃: 44.10 ppb
  • NO₂: 2.10 ppb
  • SO₂: 0.62 ppb
  • CO: 118.26 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

6 PM
52 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 9.71 µg/m³
  • PM10: 12.58 µg/m³
  • O₃: 40.06 ppb
  • NO₂: 3.72 ppb
  • SO₂: 0.68 ppb
  • CO: 128.72 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

7 PM
52 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 10.45 µg/m³
  • PM10: 13.41 µg/m³
  • O₃: 36.01 ppb
  • NO₂: 5.33 ppb
  • SO₂: 0.74 ppb
  • CO: 139.17 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.