Hourly Weather | Today Monday, January 19, 2026
Sunnyvale, California
1 AM
Cloudy Night
46°
Feels Like 45°
0
Humidity: 86%
Wind: 6 mph
UV Index: 0
2 AM
Cloudy Night
45°
Feels Like 43°
0
Humidity: 85%
Wind: 6 mph
UV Index: 0
3 AM
Cloudy Night
45°
Feels Like 43°
0
Humidity: 85%
Wind: 6 mph
UV Index: 0
4 AM
Cloudy Night
45°
Feels Like 43°
0
Humidity: 84%
Wind: 6 mph
UV Index: 0
5 AM
Cloudy Night
43°
Feels Like 43°
0
Humidity: 84%
Wind: 5 mph
UV Index: 0
6 AM
Cloudy Night
43°
Feels Like 43°
0
Humidity: 85%
Wind: 5 mph
UV Index: 0
7 AM
Night
43°
Feels Like 41°
0
Humidity: 86%
Wind: 5 mph
UV Index: 0
8 AM
Sunny Weather
45°
Feels Like 45°
0
Humidity: 81%
Wind: 6 mph
UV Index: 1
9 AM
Sunny Weather
48°
Feels Like 50°
0
Humidity: 74%
Wind: 6 mph
UV Index: 2
10 AM
Cloudy Weather
54°
Feels Like 55°
0
Humidity: 65%
Wind: 6 mph
UV Index: 2
11 AM
Sunny Weather
59°
Feels Like 63°
0
Humidity: 55%
Wind: 7 mph
UV Index: 3
12 PM
Sunny Weather
63°
Feels Like 64°
0
Humidity: 49%
Wind: 7 mph
UV Index: 3
1 PM
Sunny Weather
64°
Feels Like 66°
0
Humidity: 44%
Wind: 7 mph
UV Index: 3
2 PM
Sunny Weather
68°
Feels Like 68°
0
Humidity: 41%
Wind: 7 mph
UV Index: 2
3 PM
Sunny Weather
70°
Feels Like 70°
0
Humidity: 40%
Wind: 7 mph
UV Index: 2
4 PM
Sunny Weather
66°
Feels Like 64°
0
Humidity: 44%
Wind: 7 mph
UV Index: 1
5 PM
Sunny Weather
64°
Feels Like 63°
0
Humidity: 49%
Wind: 7 mph
UV Index: 0
6 PM
Night
61°
Feels Like 57°
0
Humidity: 53%
Wind: 7 mph
UV Index: 0
7 PM
Night
57°
Feels Like 55°
0
Humidity: 58%
Wind: 6 mph
UV Index: 0
8 PM
Night
54°
Feels Like 52°
0
Humidity: 64%
Wind: 6 mph
UV Index: 0
9 PM
Night
52°
Feels Like 48°
0
Humidity: 71%
Wind: 6 mph
UV Index: 0
10 PM
Night
50°
Feels Like 48°
0
Humidity: 74%
Wind: 6 mph
UV Index: 0
11 PM
Night
48°
Feels Like 46°
0
Humidity: 76%
Wind: 6 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

1 AM
72 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 22.18 µg/m³
  • PM10: 30.95 µg/m³
  • O3: 0.030 ppm
  • NO2: 4.8 ppb
  • SO2: 0.5 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.

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

Pollutant Concentrations:

  • PM2.5: 20.18 µg/m³
  • PM10: 29.06 µg/m³
  • O3: 0.029 ppm
  • NO2: 4.8 ppb
  • SO2: 0.5 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 19.08 µg/m³
  • PM10: 28.02 µg/m³
  • O3: 0.028 ppm
  • NO2: 5 ppb
  • SO2: 0.4 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 19.18 µg/m³
  • PM10: 28.19 µg/m³
  • O3: 0.027 ppm
  • NO2: 5.4 ppb
  • SO2: 0.5 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 19.9 µg/m³
  • PM10: 28.95 µg/m³
  • O3: 0.026 ppm
  • NO2: 5.9 ppb
  • SO2: 0.5 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 AM
66 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 19.7 µg/m³
  • PM10: 28.78 µg/m³
  • O3: 0.025 ppm
  • NO2: 6.1 ppb
  • SO2: 0.5 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 AM
64 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 18.57 µg/m³
  • PM10: 27.67 µg/m³
  • O3: 0.024 ppm
  • NO2: 5.9 ppb
  • SO2: 0.5 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 17.43 µg/m³
  • PM10: 26.64 µg/m³
  • O3: 0.024 ppm
  • NO2: 5.7 ppb
  • SO2: 0.5 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 16.41 µg/m³
  • PM10: 25.63 µg/m³
  • O3: 0.025 ppm
  • NO2: 5 ppb
  • SO2: 0.5 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 15.63 µg/m³
  • PM10: 24.79 µg/m³
  • O3: 0.027 ppm
  • NO2: 4.2 ppb
  • SO2: 0.5 ppb
  • CO: 0.20 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: 15.33 µg/m³
  • PM10: 24.5 µg/m³
  • O3: 0.029 ppm
  • NO2: 3.8 ppb
  • SO2: 0.5 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 15.87 µg/m³
  • PM10: 25.13 µg/m³
  • O3: 0.032 ppm
  • NO2: 3.6 ppb
  • SO2: 0.6 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 17.07 µg/m³
  • PM10: 26.39 µg/m³
  • O3: 0.036 ppm
  • NO2: 3.6 ppb
  • SO2: 0.6 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 17.91 µg/m³
  • PM10: 27.2 µg/m³
  • O3: 0.039 ppm
  • NO2: 3.4 ppb
  • SO2: 0.6 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 18.04 µg/m³
  • PM10: 27.23 µg/m³
  • O3: 0.042 ppm
  • NO2: 3.4 ppb
  • SO2: 0.6 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 17.57 µg/m³
  • PM10: 26.54 µg/m³
  • O3: 0.043 ppm
  • NO2: 3.6 ppb
  • SO2: 0.6 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 16.66 µg/m³
  • PM10: 25.3 µg/m³
  • O3: 0.043 ppm
  • NO2: 4 ppb
  • SO2: 0.6 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 15.52 µg/m³
  • PM10: 24.07 µg/m³
  • O3: 0.042 ppm
  • NO2: 3.9 ppb
  • SO2: 0.6 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 14.36 µg/m³
  • PM10: 23.13 µg/m³
  • O3: 0.041 ppm
  • NO2: 3.4 ppb
  • SO2: 0.5 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 13.57 µg/m³
  • PM10: 22.61 µg/m³
  • O3: 0.041 ppm
  • NO2: 3.1 ppb
  • SO2: 0.5 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 13.17 µg/m³
  • PM10: 22.28 µg/m³
  • O3: 0.040 ppm
  • NO2: 3.2 ppb
  • SO2: 0.5 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 13.22 µg/m³
  • PM10: 22.28 µg/m³
  • O3: 0.038 ppm
  • NO2: 3.5 ppb
  • SO2: 0.4 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 13.62 µg/m³
  • PM10: 22.61 µg/m³
  • O3: 0.037 ppm
  • NO2: 3.9 ppb
  • SO2: 0.4 ppb
  • CO: 0.18 ppm

Health Recommendations:

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