Hourly Weather | Today Sunday, December 14, 2025
Fremont, California
6 AM
Foggy Weather
39°
Feels Like 36°
0
Humidity: 100%
Wind: 5 mph
UV Index: 0
7 AM
Foggy Weather
39°
Feels Like 37°
0
Humidity: 97%
Wind: 5 mph
UV Index: 0
8 AM
Foggy Weather
41°
Feels Like 39°
0
Humidity: 95%
Wind: 5 mph
UV Index: 0
9 AM
Foggy Weather
43°
Feels Like 43°
0
Humidity: 95%
Wind: 5 mph
UV Index: 1
10 AM
Foggy Weather
46°
Feels Like 45°
0
Humidity: 90%
Wind: 5 mph
UV Index: 1
11 AM
Foggy Weather
48°
Feels Like 48°
0
Humidity: 84%
Wind: 6 mph
UV Index: 1
12 PM
Foggy Weather
52°
Feels Like 52°
0
Humidity: 79%
Wind: 6 mph
UV Index: 1
1 PM
Cloudy Weather
54°
Feels Like 57°
0
Humidity: 72%
Wind: 6 mph
UV Index: 2
2 PM
Cloudy Weather
55°
Feels Like 57°
0
Humidity: 70%
Wind: 6 mph
UV Index: 2
3 PM
Cloudy Weather
55°
Feels Like 55°
0
Humidity: 75%
Wind: 6 mph
UV Index: 1
4 PM
Cloudy Weather
54°
Feels Like 54°
0
Humidity: 79%
Wind: 6 mph
UV Index: 1
5 PM
Cloudy Night
52°
Feels Like 48°
0
Humidity: 87%
Wind: 6 mph
UV Index: 0
6 PM
Cloudy Night
48°
Feels Like 46°
0
Humidity: 93%
Wind: 5 mph
UV Index: 0
7 PM
Night
45°
Feels Like 43°
0
Humidity: 100%
Wind: 5 mph
UV Index: 0
8 PM
Night
43°
Feels Like 43°
0
Humidity: 100%
Wind: 5 mph
UV Index: 0
9 PM
Night
43°
Feels Like 43°
0
Humidity: 100%
Wind: 5 mph
UV Index: 0
10 PM
Night
43°
Feels Like 41°
0
Humidity: 100%
Wind: 5 mph
UV Index: 0
11 PM
Night
43°
Feels Like 41°
0
Humidity: 100%
Wind: 5 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

6 AM
47 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 11.24 µg/m³
  • PM10: 17.94 µg/m³
  • O3: 0.038 ppm
  • NO2: 1.3 ppb
  • SO2: 0.5 ppb
  • CO: 0.12 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

7 AM
50 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 12.04 µg/m³
  • PM10: 18.56 µg/m³
  • O3: 0.037 ppm
  • NO2: 1.5 ppb
  • SO2: 0.5 ppb
  • CO: 0.13 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

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

Pollutant Concentrations:

  • PM2.5: 12.37 µg/m³
  • PM10: 18.68 µg/m³
  • O3: 0.036 ppm
  • NO2: 1.8 ppb
  • SO2: 0.5 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 12.27 µg/m³
  • PM10: 18.46 µg/m³
  • O3: 0.037 ppm
  • NO2: 2 ppb
  • SO2: 0.5 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

10 AM
48 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 11.47 µg/m³
  • PM10: 17.51 µg/m³
  • O3: 0.037 ppm
  • NO2: 1.7 ppb
  • SO2: 0.5 ppb
  • CO: 0.13 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

11 AM
44 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 10.53 µg/m³
  • PM10: 16.37 µg/m³
  • O3: 0.039 ppm
  • NO2: 1.4 ppb
  • SO2: 0.5 ppb
  • CO: 0.12 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

12 PM
45 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 10.7 µg/m³
  • PM10: 16.44 µg/m³
  • O3: 0.040 ppm
  • NO2: 1.3 ppb
  • SO2: 0.5 ppb
  • CO: 0.12 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

1 PM
50 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 11.93 µg/m³
  • PM10: 17.67 µg/m³
  • O3: 0.041 ppm
  • NO2: 1.2 ppb
  • SO2: 0.5 ppb
  • CO: 0.13 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

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

Pollutant Concentrations:

  • PM2.5: 13.44 µg/m³
  • PM10: 19.2 µg/m³
  • O3: 0.043 ppm
  • NO2: 1.2 ppb
  • SO2: 0.6 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 13.87 µg/m³
  • PM10: 19.56 µg/m³
  • O3: 0.044 ppm
  • NO2: 1.2 ppb
  • SO2: 0.6 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 13.21 µg/m³
  • PM10: 18.73 µg/m³
  • O3: 0.045 ppm
  • NO2: 1.3 ppb
  • SO2: 0.5 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 12.5 µg/m³
  • PM10: 17.82 µg/m³
  • O3: 0.046 ppm
  • NO2: 1.6 ppb
  • SO2: 0.5 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 12.67 µg/m³
  • PM10: 17.94 µg/m³
  • O3: 0.045 ppm
  • NO2: 1.8 ppb
  • SO2: 0.6 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 13.29 µg/m³
  • PM10: 18.69 µg/m³
  • O3: 0.045 ppm
  • NO2: 2 ppb
  • SO2: 0.6 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 14.39 µg/m³
  • PM10: 20.05 µg/m³
  • O3: 0.043 ppm
  • NO2: 2.3 ppb
  • SO2: 0.6 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 16.34 µg/m³
  • PM10: 22.16 µg/m³
  • O3: 0.042 ppm
  • NO2: 2.9 ppb
  • SO2: 0.6 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 19.08 µg/m³
  • PM10: 25.04 µg/m³
  • O3: 0.040 ppm
  • NO2: 3.8 ppb
  • SO2: 0.7 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
71 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 22.03 µg/m³
  • PM10: 28.12 µg/m³
  • O3: 0.038 ppm
  • NO2: 4.6 ppb
  • SO2: 0.7 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.