Hourly Weather | Today Thursday, February 26, 2026
Hayward, California
2 AM
Cloudy Night
55°
Feels Like 55°
7
Humidity: 88%
UV Index: 0
Wind: 6 mph
3 AM
Cloudy Night
55°
Feels Like 54°
7
Humidity: 88%
UV Index: 0
Wind: 6 mph
4 AM
Cloudy Night
55°
Feels Like 54°
7
Humidity: 88%
UV Index: 0
Wind: 6 mph
5 AM
Cloudy Night
55°
Feels Like 54°
7
Humidity: 88%
UV Index: 0
Wind: 6 mph
6 AM
Cloudy Night
54°
Feels Like 52°
5
Humidity: 91%
UV Index: 0
Wind: 6 mph
7 AM
Cloudy Weather
54°
Feels Like 55°
0
Humidity: 96%
UV Index: 0
Wind: 4 mph
8 AM
Cloudy Weather
55°
Feels Like 57°
0
Humidity: 91%
UV Index: 1
Wind: 5 mph
9 AM
Cloudy Weather
59°
Feels Like 61°
0
Humidity: 84%
UV Index: 1
Wind: 5 mph
10 AM
Cloudy Weather
63°
Feels Like 64°
0
Humidity: 78%
UV Index: 1
Wind: 6 mph
11 AM
Cloudy Weather
64°
Feels Like 66°
0
Humidity: 71%
UV Index: 2
Wind: 6 mph
12 PM
Cloudy Weather
68°
Feels Like 70°
0
Humidity: 66%
UV Index: 3
Wind: 7 mph
1 PM
Cloudy Weather
70°
Feels Like 73°
0
Humidity: 62%
UV Index: 4
Wind: 7 mph
2 PM
Cloudy Weather
72°
Feels Like 73°
0
Humidity: 58%
UV Index: 3
Wind: 7 mph
3 PM
Cloudy Weather
73°
Feels Like 73°
0
Humidity: 55%
UV Index: 2
Wind: 8 mph
4 PM
Cloudy Weather
72°
Feels Like 72°
0
Humidity: 58%
UV Index: 1
Wind: 8 mph
5 PM
Cloudy Weather
70°
Feels Like 66°
0
Humidity: 62%
UV Index: 1
Wind: 7 mph
6 PM
Cloudy Night
66°
Feels Like 64°
0
Humidity: 68%
UV Index: 0
Wind: 7 mph
7 PM
Cloudy Night
64°
Feels Like 63°
0
Humidity: 74%
UV Index: 0
Wind: 6 mph
8 PM
Cloudy Night
63°
Feels Like 61°
0
Humidity: 77%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Night
61°
Feels Like 59°
0
Humidity: 80%
UV Index: 0
Wind: 6 mph
10 PM
Cloudy Night
59°
Feels Like 59°
0
Humidity: 81%
UV Index: 0
Wind: 5 mph
11 PM
Cloudy Night
57°
Feels Like 57°
0
Humidity: 83%
UV Index: 0
Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

2 AM
26 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.9 µg/m³
  • PM10: 7.23 µg/m³
  • O3: 0.028 ppm
  • NO2: 1.8 ppb
  • SO2: 0.3 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

3 AM
25 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.94 µg/m³
  • PM10: 7.46 µg/m³
  • O3: 0.027 ppm
  • NO2: 1.9 ppb
  • SO2: 0.3 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

4 AM
24 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.99 µg/m³
  • PM10: 7.59 µg/m³
  • O3: 0.026 ppm
  • NO2: 2 ppb
  • SO2: 0.4 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

5 AM
23 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.02 µg/m³
  • PM10: 7.63 µg/m³
  • O3: 0.025 ppm
  • NO2: 2.2 ppb
  • SO2: 0.4 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

6 AM
22 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.06 µg/m³
  • PM10: 7.68 µg/m³
  • O3: 0.024 ppm
  • NO2: 2.3 ppb
  • SO2: 0.4 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

7 AM
22 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.06 µg/m³
  • PM10: 7.66 µg/m³
  • O3: 0.023 ppm
  • NO2: 2.4 ppb
  • SO2: 0.4 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

8 AM
21 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.11 µg/m³
  • PM10: 7.67 µg/m³
  • O3: 0.023 ppm
  • NO2: 2.7 ppb
  • SO2: 0.4 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

9 AM
21 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.22 µg/m³
  • PM10: 7.76 µg/m³
  • O3: 0.023 ppm
  • NO2: 2.4 ppb
  • SO2: 0.4 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

10 AM
23 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.38 µg/m³
  • PM10: 7.92 µg/m³
  • O3: 0.025 ppm
  • NO2: 2 ppb
  • SO2: 0.4 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

11 AM
27 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.66 µg/m³
  • PM10: 8.21 µg/m³
  • O3: 0.029 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.

12 PM
32 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.29 µg/m³
  • PM10: 8.89 µg/m³
  • O3: 0.034 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.

1 PM
37 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 6.19 µg/m³
  • PM10: 9.83 µg/m³
  • O3: 0.040 ppm
  • NO2: 1.4 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
41 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 6.86 µg/m³
  • PM10: 10.46 µg/m³
  • O3: 0.044 ppm
  • NO2: 1.4 ppb
  • SO2: 0.4 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

3 PM
43 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 7.06 µg/m³
  • PM10: 10.71 µg/m³
  • O3: 0.047 ppm
  • NO2: 1.5 ppb
  • SO2: 0.4 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

4 PM
44 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 6.81 µg/m³
  • PM10: 10.54 µg/m³
  • O3: 0.048 ppm
  • NO2: 1.8 ppb
  • SO2: 0.4 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

5 PM
44 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 6.28 µg/m³
  • PM10: 10.06 µg/m³
  • O3: 0.047 ppm
  • NO2: 2 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

6 PM
44 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.76 µg/m³
  • PM10: 9.56 µg/m³
  • O3: 0.047 ppm
  • NO2: 2.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

7 PM
44 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.38 µg/m³
  • PM10: 9.28 µg/m³
  • O3: 0.047 ppm
  • NO2: 2 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

8 PM
44 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.19 µg/m³
  • PM10: 9.28 µg/m³
  • O3: 0.047 ppm
  • NO2: 1.8 ppb
  • SO2: 0.4 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

9 PM
44 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.03 µg/m³
  • PM10: 9.21 µg/m³
  • O3: 0.047 ppm
  • NO2: 1.7 ppb
  • SO2: 0.4 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

10 PM
43 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.67 µg/m³
  • PM10: 8.78 µg/m³
  • O3: 0.047 ppm
  • NO2: 1.6 ppb
  • SO2: 0.4 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

11 PM
43 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.28 µg/m³
  • PM10: 8.27 µg/m³
  • O3: 0.046 ppm
  • NO2: 1.6 ppb
  • SO2: 0.4 ppb
  • CO: 0.13 ppm

Health Recommendations:

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