Hourly Weather | Today Sunday, October 5, 2025
Sunnyvale, California
2 AM
Night
55°
Feels Like 55°
0
Humidity: 91%
Wind: 5 mph
UV Index: 0
3 AM
Night
55°
Feels Like 55°
0
Humidity: 91%
Wind: 4 mph
UV Index: 0
4 AM
Night
55°
Feels Like 55°
0
Humidity: 91%
Wind: 4 mph
UV Index: 0
5 AM
Night
55°
Feels Like 55°
0
Humidity: 90%
Wind: 4 mph
UV Index: 0
6 AM
Night
55°
Feels Like 55°
0
Humidity: 91%
Wind: 4 mph
UV Index: 0
7 AM
Night
55°
Feels Like 55°
0
Humidity: 91%
Wind: 2 mph
UV Index: 0
8 AM
Cloudy Weather
57°
Feels Like 61°
0
Humidity: 84%
Wind: 2 mph
UV Index: 7
9 AM
Cloudy Weather
61°
Feels Like 64°
0
Humidity: 75%
Wind: 2 mph
UV Index: 16
10 AM
Cloudy Weather
64°
Feels Like 72°
0
Humidity: 68%
Wind: 4 mph
UV Index: 25
11 AM
Cloudy Weather
70°
Feels Like 73°
0
Humidity: 61%
Wind: 5 mph
UV Index: 36
12 PM
Cloudy Weather
72°
Feels Like 77°
0
Humidity: 55%
Wind: 6 mph
UV Index: 43
1 PM
Cloudy Weather
75°
Feels Like 79°
0
Humidity: 49%
Wind: 7 mph
UV Index: 46
2 PM
Cloudy Weather
77°
Feels Like 81°
0
Humidity: 44%
Wind: 8 mph
UV Index: 43
3 PM
Cloudy Weather
81°
Feels Like 81°
0
Humidity: 41%
Wind: 8 mph
UV Index: 36
4 PM
Cloudy Weather
79°
Feels Like 79°
0
Humidity: 42%
Wind: 9 mph
UV Index: 25
5 PM
Cloudy Weather
77°
Feels Like 75°
0
Humidity: 45%
Wind: 9 mph
UV Index: 16
6 PM
Cloudy Weather
75°
Feels Like 73°
0
Humidity: 51%
Wind: 8 mph
UV Index: 7
7 PM
Cloudy Night
72°
Feels Like 70°
0
Humidity: 59%
Wind: 7 mph
UV Index: 0
8 PM
Night
70°
Feels Like 66°
0
Humidity: 67%
Wind: 6 mph
UV Index: 0
9 PM
Night
66°
Feels Like 64°
0
Humidity: 73%
Wind: 5 mph
UV Index: 0
10 PM
Night
64°
Feels Like 64°
0
Humidity: 76%
Wind: 5 mph
UV Index: 0
11 PM
Night
64°
Feels Like 64°
0
Humidity: 78%
Wind: 4 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

2 AM
47 AQI
Good air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 16.67 µg/m³
  • PM10: 21.74 µg/m³
  • O₃: 12.91 ppb
  • NO₂: 18.73 ppb
  • SO₂: 1.20 ppb
  • CO: 231.59 ppb

Health Recommendations:

With this level of air quality, you have no limitations. Enjoy the outdoors

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

Pollutant Concentrations:

  • PM2.5: 17.29 µg/m³
  • PM10: 21.97 µg/m³
  • O₃: 12.23 ppb
  • NO₂: 17.96 ppb
  • SO₂: 1.27 ppb
  • CO: 226.09 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: 17.45 µg/m³
  • PM10: 21.83 µg/m³
  • O₃: 12.12 ppb
  • NO₂: 16.90 ppb
  • SO₂: 1.33 ppb
  • CO: 218.31 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: 17.59 µg/m³
  • PM10: 21.68 µg/m³
  • O₃: 12.27 ppb
  • NO₂: 15.70 ppb
  • SO₂: 1.37 ppb
  • CO: 209.40 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
53 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 18.45 µg/m³
  • PM10: 21.18 µg/m³
  • O₃: 10.51 ppb
  • NO₂: 14.54 ppb
  • SO₂: 1.51 ppb
  • CO: 213.69 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
55 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 18.81 µg/m³
  • PM10: 21.20 µg/m³
  • O₃: 10.80 ppb
  • NO₂: 13.44 ppb
  • SO₂: 1.52 ppb
  • CO: 217.78 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
56 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 18.61 µg/m³
  • PM10: 21.10 µg/m³
  • O₃: 11.09 ppb
  • NO₂: 12.33 ppb
  • SO₂: 1.53 ppb
  • CO: 221.87 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
56 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 14.80 µg/m³
  • PM10: 18.08 µg/m³
  • O₃: 19.66 ppb
  • NO₂: 9.87 ppb
  • SO₂: 1.51 ppb
  • CO: 197.95 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
57 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 11.99 µg/m³
  • PM10: 15.40 µg/m³
  • O₃: 28.23 ppb
  • NO₂: 7.41 ppb
  • SO₂: 1.49 ppb
  • CO: 174.02 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
57 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 10.12 µg/m³
  • PM10: 13.18 µg/m³
  • O₃: 36.80 ppb
  • NO₂: 4.95 ppb
  • SO₂: 1.47 ppb
  • CO: 150.09 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
57 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 9.56 µg/m³
  • PM10: 12.37 µg/m³
  • O₃: 40.95 ppb
  • NO₂: 4.30 ppb
  • SO₂: 1.39 ppb
  • CO: 147.20 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
57 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 9.60 µg/m³
  • PM10: 12.21 µg/m³
  • O₃: 45.10 ppb
  • NO₂: 3.64 ppb
  • SO₂: 1.31 ppb
  • CO: 144.31 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
57 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 9.69 µg/m³
  • PM10: 12.08 µg/m³
  • O₃: 49.25 ppb
  • NO₂: 2.99 ppb
  • SO₂: 1.23 ppb
  • CO: 141.42 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
57 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 9.64 µg/m³
  • PM10: 11.85 µg/m³
  • O₃: 49.76 ppb
  • NO₂: 3.22 ppb
  • SO₂: 1.27 ppb
  • CO: 142.81 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
58 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 9.61 µg/m³
  • PM10: 11.62 µg/m³
  • O₃: 50.28 ppb
  • NO₂: 3.45 ppb
  • SO₂: 1.30 ppb
  • CO: 144.19 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
58 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 9.59 µg/m³
  • PM10: 11.43 µg/m³
  • O₃: 50.79 ppb
  • NO₂: 3.68 ppb
  • SO₂: 1.34 ppb
  • CO: 145.57 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
58 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 10.12 µg/m³
  • PM10: 11.86 µg/m³
  • O₃: 41.15 ppb
  • NO₂: 9.11 ppb
  • SO₂: 1.43 ppb
  • CO: 177.44 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
58 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 11.69 µg/m³
  • PM10: 13.23 µg/m³
  • O₃: 31.50 ppb
  • NO₂: 14.54 ppb
  • SO₂: 1.53 ppb
  • CO: 209.31 ppb

Health Recommendations:

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

8 PM
58 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 13.87 µg/m³
  • PM10: 15.49 µg/m³
  • O₃: 21.86 ppb
  • NO₂: 19.97 ppb
  • SO₂: 1.63 ppb
  • CO: 241.19 ppb

Health Recommendations:

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

9 PM
59 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 16.64 µg/m³
  • PM10: 18.44 µg/m³
  • O₃: 18.08 ppb
  • NO₂: 22.67 ppb
  • SO₂: 1.78 ppb
  • CO: 276.69 ppb

Health Recommendations:

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

10 PM
59 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 19.71 µg/m³
  • PM10: 21.64 µg/m³
  • O₃: 14.29 ppb
  • NO₂: 25.37 ppb
  • SO₂: 1.92 ppb
  • CO: 312.19 ppb

Health Recommendations:

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