Hourly Weather | Today Sunday, April 26, 2026
Sunnyvale, California
11 AM
Cloudy Weather
59°
Feels Like 63°
31
Humidity: 70%
UV Index: 3
Wind: 7 mph
12 PM
Cloudy Weather
61°
Feels Like 64°
31
Humidity: 65%
UV Index: 4
Wind: 9 mph
1 PM
Cloudy Weather
63°
Feels Like 66°
33
Humidity: 60%
UV Index: 5
Wind: 9 mph
2 PM
Cloudy Weather
63°
Feels Like 66°
40
Humidity: 56%
UV Index: 5
Wind: 10 mph
3 PM
Partly Sunny with Showers
64°
Feels Like 63°
44
Humidity: 53%
UV Index: 3
Wind: 12 mph
4 PM
Partly Sunny with Showers
63°
Feels Like 61°
44
Humidity: 54%
UV Index: 2
Wind: 12 mph
5 PM
Cloudy Weather
63°
Feels Like 61°
39
Humidity: 55%
UV Index: 1
Wind: 12 mph
6 PM
Cloudy Weather
61°
Feels Like 59°
34
Humidity: 59%
UV Index: 2
Wind: 10 mph
7 PM
Cloudy Weather
57°
Feels Like 55°
29
Humidity: 63%
UV Index: 1
Wind: 9 mph
8 PM
Cloudy Night
55°
Feels Like 54°
20
Humidity: 69%
UV Index: 0
Wind: 8 mph
9 PM
Cloudy Night
55°
Feels Like 52°
20
Humidity: 73%
UV Index: 0
Wind: 7 mph
10 PM
Cloudy Night
54°
Feels Like 52°
25
Humidity: 76%
UV Index: 0
Wind: 6 mph
11 PM
Rainy Night
54°
Feels Like 52°
25
Humidity: 77%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

11 AM
83 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.01 µg/m³
  • PM10: 7.14 µg/m³
  • O3: 0.065 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

12 PM
83 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.94 µg/m³
  • PM10: 7.14 µg/m³
  • O3: 0.064 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.83 µg/m³
  • PM10: 6.96 µg/m³
  • O3: 0.065 ppm
  • NO2: 0.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

2 PM
83 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.71 µg/m³
  • PM10: 6.76 µg/m³
  • O3: 0.064 ppm
  • NO2: 0.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

3 PM
83 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.59 µg/m³
  • PM10: 6.6 µg/m³
  • O3: 0.064 ppm
  • NO2: 0.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

4 PM
82 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.49 µg/m³
  • PM10: 6.48 µg/m³
  • O3: 0.064 ppm
  • NO2: 0.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

5 PM
82 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.42 µg/m³
  • PM10: 6.37 µg/m³
  • O3: 0.064 ppm
  • NO2: 0.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

6 PM
82 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.37 µg/m³
  • PM10: 6.28 µg/m³
  • O3: 0.064 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

7 PM
81 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.31 µg/m³
  • PM10: 6.15 µg/m³
  • O3: 0.064 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

8 PM
79 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.23 µg/m³
  • PM10: 5.95 µg/m³
  • O3: 0.063 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

9 PM
78 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.15 µg/m³
  • PM10: 5.75 µg/m³
  • O3: 0.063 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

10 PM
75 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.1 µg/m³
  • PM10: 5.65 µg/m³
  • O3: 0.062 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

11 PM
73 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.06 µg/m³
  • PM10: 5.63 µg/m³
  • O3: 0.061 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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