Hourly Weather | Today Thursday, May 21, 2026
Daly City, California
9 AM
Cloudy Weather
55°
Feels Like 54°
0
Humidity: 82%
UV Index: 1
Wind: 7 mph
10 AM
Cloudy Weather
57°
Feels Like 57°
0
Humidity: 78%
UV Index: 2
Wind: 7 mph
11 AM
Cloudy Weather
57°
Feels Like 61°
0
Humidity: 74%
UV Index: 3
Wind: 8 mph
12 PM
Cloudy Weather
61°
Feels Like 63°
0
Humidity: 71%
UV Index: 4
Wind: 9 mph
1 PM
Cloudy Weather
61°
Feels Like 63°
0
Humidity: 69%
UV Index: 4
Wind: 10 mph
2 PM
Cloudy Weather
63°
Feels Like 68°
0
Humidity: 66%
UV Index: 10
Wind: 12 mph
3 PM
Cloudy Weather
63°
Feels Like 64°
0
Humidity: 67%
UV Index: 7
Wind: 12 mph
4 PM
Cloudy Weather
61°
Feels Like 61°
0
Humidity: 71%
UV Index: 5
Wind: 13 mph
5 PM
Cloudy Weather
59°
Feels Like 57°
0
Humidity: 73%
UV Index: 3
Wind: 13 mph
6 PM
Cloudy Weather
57°
Feels Like 55°
0
Humidity: 76%
UV Index: 2
Wind: 12 mph
7 PM
Cloudy Weather
55°
Feels Like 54°
0
Humidity: 80%
UV Index: 1
Wind: 10 mph
8 PM
Cloudy Weather
54°
Feels Like 48°
0
Humidity: 85%
UV Index: 0
Wind: 10 mph
9 PM
Cloudy Night
54°
Feels Like 48°
0
Humidity: 85%
UV Index: 0
Wind: 9 mph
10 PM
Cloudy Night
54°
Feels Like 48°
0
Humidity: 86%
UV Index: 0
Wind: 9 mph
11 PM
Cloudy Night
54°
Feels Like 48°
0
Humidity: 87%
UV Index: 0
Wind: 8 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 6.19 µg/m³
  • PM10: 23.86 µg/m³
  • O3: 0.044 ppm
  • NO2: 0.4 ppb
  • SO2: 0.4 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.44 µg/m³
  • PM10: 24.4 µg/m³
  • O3: 0.045 ppm
  • NO2: 0.3 ppb
  • SO2: 0.4 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.67 µg/m³
  • PM10: 24.73 µg/m³
  • O3: 0.045 ppm
  • NO2: 0.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.91 µg/m³
  • PM10: 25.1 µg/m³
  • O3: 0.046 ppm
  • NO2: 0.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.18 µg/m³
  • PM10: 25.5 µg/m³
  • O3: 0.046 ppm
  • NO2: 0.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.44 µg/m³
  • PM10: 25.78 µg/m³
  • O3: 0.046 ppm
  • NO2: 0.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 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: 7.7 µg/m³
  • PM10: 26.15 µg/m³
  • O3: 0.046 ppm
  • NO2: 0.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.97 µg/m³
  • PM10: 26.55 µg/m³
  • O3: 0.046 ppm
  • NO2: 0.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.26 µg/m³
  • PM10: 27.01 µg/m³
  • O3: 0.046 ppm
  • NO2: 0.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.53 µg/m³
  • PM10: 27.46 µg/m³
  • O3: 0.046 ppm
  • NO2: 0.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.74 µg/m³
  • PM10: 27.77 µg/m³
  • O3: 0.046 ppm
  • NO2: 0.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.92 µg/m³
  • PM10: 28.09 µg/m³
  • O3: 0.045 ppm
  • NO2: 0.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.06 µg/m³
  • PM10: 28.31 µg/m³
  • O3: 0.045 ppm
  • NO2: 0.4 ppb
  • SO2: 0.4 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.15 µg/m³
  • PM10: 28.55 µg/m³
  • O3: 0.044 ppm
  • NO2: 0.4 ppb
  • SO2: 0.4 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.2 µg/m³
  • PM10: 28.87 µg/m³
  • O3: 0.044 ppm
  • NO2: 0.4 ppb
  • SO2: 0.4 ppb
  • CO: 0.10 ppm

Health Recommendations:

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