Hourly Weather | Today Thursday, December 11, 2025
Sunnyvale, California
6 AM
Night
43°
Feels Like 45°
23
Humidity: 92%
Wind: 2 mph
UV Index: 0
7 AM
Cloudy Night
45°
Feels Like 43°
0
Humidity: 93%
Wind: 5 mph
UV Index: 0
8 AM
Cloudy Weather
45°
Feels Like 45°
0
Humidity: 92%
Wind: 5 mph
UV Index: 1
9 AM
Cloudy Weather
48°
Feels Like 52°
0
Humidity: 83%
Wind: 5 mph
UV Index: 1
10 AM
Cloudy Weather
52°
Feels Like 55°
0
Humidity: 73%
Wind: 5 mph
UV Index: 2
11 AM
Cloudy Weather
55°
Feels Like 59°
0
Humidity: 67%
Wind: 5 mph
UV Index: 2
12 PM
Cloudy Weather
57°
Feels Like 63°
0
Humidity: 61%
Wind: 6 mph
UV Index: 3
1 PM
Cloudy Weather
61°
Feels Like 64°
0
Humidity: 56%
Wind: 6 mph
UV Index: 2
2 PM
Cloudy Weather
63°
Feels Like 64°
0
Humidity: 53%
Wind: 6 mph
UV Index: 2
3 PM
Cloudy Weather
63°
Feels Like 63°
0
Humidity: 55%
Wind: 6 mph
UV Index: 1
4 PM
Cloudy Weather
61°
Feels Like 61°
0
Humidity: 60%
Wind: 6 mph
UV Index: 1
5 PM
Cloudy Night
57°
Feels Like 55°
0
Humidity: 67%
Wind: 5 mph
UV Index: 0
6 PM
Cloudy Night
54°
Feels Like 54°
0
Humidity: 75%
Wind: 5 mph
UV Index: 0
7 PM
Cloudy Night
52°
Feels Like 52°
0
Humidity: 83%
Wind: 5 mph
UV Index: 0
8 PM
Cloudy Night
48°
Feels Like 48°
0
Humidity: 92%
Wind: 4 mph
UV Index: 0
9 PM
Cloudy Night
45°
Feels Like 46°
0
Humidity: 100%
Wind: 4 mph
UV Index: 0
10 PM
Cloudy Night
46°
Feels Like 48°
0
Humidity: 84%
Wind: 4 mph
UV Index: 0
11 PM
Cloudy Night
46°
Feels Like 46°
0
Humidity: 84%
Wind: 4 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

6 AM
62 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 17.45 µg/m³
  • PM10: 26.43 µg/m³
  • O3: 0.019 ppm
  • NO2: 10.5 ppb
  • SO2: 0.9 ppb
  • CO: 0.27 ppm

Health Recommendations:

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

7 AM
60 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 16.86 µg/m³
  • PM10: 25.86 µg/m³
  • O3: 0.019 ppm
  • NO2: 10.1 ppb
  • SO2: 0.9 ppb
  • CO: 0.27 ppm

Health Recommendations:

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

8 AM
59 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 16.24 µg/m³
  • PM10: 25.33 µg/m³
  • O3: 0.020 ppm
  • NO2: 10 ppb
  • SO2: 0.9 ppb
  • CO: 0.26 ppm

Health Recommendations:

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

9 AM
58 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 15.73 µg/m³
  • PM10: 24.83 µg/m³
  • O3: 0.022 ppm
  • NO2: 9.2 ppb
  • SO2: 0.9 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.

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

Pollutant Concentrations:

  • PM2.5: 15.39 µg/m³
  • PM10: 24.34 µg/m³
  • O3: 0.026 ppm
  • NO2: 7.7 ppb
  • SO2: 0.9 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
57 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 15.35 µg/m³
  • PM10: 24.14 µg/m³
  • O3: 0.028 ppm
  • NO2: 6.8 ppb
  • SO2: 0.8 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
59 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 16.43 µg/m³
  • PM10: 25.4 µg/m³
  • O3: 0.031 ppm
  • NO2: 6.4 ppb
  • SO2: 0.8 ppb
  • CO: 0.23 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 18.32 µg/m³
  • PM10: 27.55 µg/m³
  • O3: 0.035 ppm
  • NO2: 6.4 ppb
  • SO2: 0.8 ppb
  • CO: 0.23 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 20 µg/m³
  • PM10: 29.5 µg/m³
  • O3: 0.037 ppm
  • NO2: 6.6 ppb
  • SO2: 0.8 ppb
  • CO: 0.23 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 20.6 µg/m³
  • PM10: 30.22 µg/m³
  • O3: 0.038 ppm
  • NO2: 7 ppb
  • SO2: 0.8 ppb
  • CO: 0.23 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 20.17 µg/m³
  • PM10: 29.64 µg/m³
  • O3: 0.038 ppm
  • NO2: 7.8 ppb
  • SO2: 0.8 ppb
  • CO: 0.23 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 19.07 µg/m³
  • PM10: 28.19 µg/m³
  • O3: 0.037 ppm
  • NO2: 8.7 ppb
  • SO2: 0.8 ppb
  • CO: 0.22 ppm

Health Recommendations:

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

6 PM
63 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 17.97 µg/m³
  • PM10: 26.73 µg/m³
  • O3: 0.035 ppm
  • NO2: 8.4 ppb
  • SO2: 0.8 ppb
  • CO: 0.22 ppm

Health Recommendations:

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

7 PM
61 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 17.15 µg/m³
  • PM10: 25.84 µg/m³
  • O3: 0.033 ppm
  • NO2: 8.2 ppb
  • SO2: 0.8 ppb
  • CO: 0.22 ppm

Health Recommendations:

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

8 PM
61 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 17 µg/m³
  • PM10: 25.97 µg/m³
  • O3: 0.030 ppm
  • NO2: 8.5 ppb
  • SO2: 0.8 ppb
  • CO: 0.23 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 17.06 µg/m³
  • PM10: 26.27 µg/m³
  • O3: 0.028 ppm
  • NO2: 9 ppb
  • SO2: 0.8 ppb
  • CO: 0.23 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 16.95 µg/m³
  • PM10: 26.07 µg/m³
  • O3: 0.026 ppm
  • NO2: 9.3 ppb
  • SO2: 0.8 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.

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

Pollutant Concentrations:

  • PM2.5: 16.61 µg/m³
  • PM10: 25.47 µg/m³
  • O3: 0.024 ppm
  • NO2: 9.1 ppb
  • SO2: 0.8 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.