Hourly Weather | Today Tuesday, January 13, 2026
Hayward, California
3 PM
Sunny Weather
64°
Feels Like 64°
0
Humidity: 59%
Wind: 7 mph
UV Index: 1
4 PM
Sunny Weather
61°
Feels Like 61°
0
Humidity: 60%
Wind: 7 mph
UV Index: 1
5 PM
Sunny Weather
59°
Feels Like 57°
0
Humidity: 65%
Wind: 7 mph
UV Index: 0
6 PM
Night
55°
Feels Like 54°
0
Humidity: 71%
Wind: 7 mph
UV Index: 0
7 PM
Night
54°
Feels Like 50°
0
Humidity: 69%
Wind: 7 mph
UV Index: 0
8 PM
Night
50°
Feels Like 46°
0
Humidity: 71%
Wind: 7 mph
UV Index: 0
9 PM
Night
48°
Feels Like 45°
0
Humidity: 74%
Wind: 7 mph
UV Index: 0
10 PM
Night
46°
Feels Like 43°
0
Humidity: 75%
Wind: 7 mph
UV Index: 0
11 PM
Night
46°
Feels Like 43°
0
Humidity: 76%
Wind: 7 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

3 PM
117 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 42.36 µg/m³
  • PM10: 49.99 µg/m³
  • O3: 0.045 ppm
  • NO2: 12.9 ppb
  • SO2: 1.3 ppb
  • CO: 0.34 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

4 PM
128 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 46.73 µg/m³
  • PM10: 54.98 µg/m³
  • O3: 0.045 ppm
  • NO2: 15.3 ppb
  • SO2: 1.4 ppb
  • CO: 0.36 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

5 PM
133 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 48.7 µg/m³
  • PM10: 57.3 µg/m³
  • O3: 0.043 ppm
  • NO2: 18.5 ppb
  • SO2: 1.4 ppb
  • CO: 0.37 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

6 PM
130 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 47.39 µg/m³
  • PM10: 55.98 µg/m³
  • O3: 0.039 ppm
  • NO2: 18.7 ppb
  • SO2: 1.4 ppb
  • CO: 0.37 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

7 PM
121 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 43.87 µg/m³
  • PM10: 52.31 µg/m³
  • O3: 0.035 ppm
  • NO2: 16.5 ppb
  • SO2: 1.4 ppb
  • CO: 0.36 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

8 PM
113 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 40.74 µg/m³
  • PM10: 49.04 µg/m³
  • O3: 0.032 ppm
  • NO2: 15 ppb
  • SO2: 1.4 ppb
  • CO: 0.36 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

9 PM
107 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 38.35 µg/m³
  • PM10: 46.76 µg/m³
  • O3: 0.028 ppm
  • NO2: 14.4 ppb
  • SO2: 1.3 ppb
  • CO: 0.35 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

10 PM
102 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 36.27 µg/m³
  • PM10: 44.83 µg/m³
  • O3: 0.025 ppm
  • NO2: 14.5 ppb
  • SO2: 1.2 ppb
  • CO: 0.35 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

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

Pollutant Concentrations:

  • PM2.5: 34.12 µg/m³
  • PM10: 42.45 µg/m³
  • O3: 0.024 ppm
  • NO2: 14.3 ppb
  • SO2: 1.2 ppb
  • CO: 0.34 ppm

Health Recommendations:

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