Hourly Weather | Today Thursday, February 5, 2026
Redwood City, California
8 PM
Cloudy Night
57°
Feels Like 55°
0
Humidity: 78%
UV Index: 0
Wind: 5 mph
9 PM
Cloudy Night
55°
Feels Like 55°
0
Humidity: 78%
UV Index: 0
Wind: 6 mph
10 PM
Cloudy Night
55°
Feels Like 54°
0
Humidity: 78%
UV Index: 0
Wind: 6 mph
11 PM
Cloudy Night
55°
Feels Like 54°
0
Humidity: 81%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 49.65 µg/m³
  • PM10: 53.53 µg/m³
  • O3: 0.052 ppm
  • NO2: 1.5 ppb
  • SO2: 0.4 ppb
  • CO: 0.29 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 47.73 µg/m³
  • PM10: 52.17 µg/m³
  • O3: 0.052 ppm
  • NO2: 1.4 ppb
  • SO2: 0.4 ppb
  • CO: 0.29 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 47.31 µg/m³
  • PM10: 52.8 µg/m³
  • O3: 0.054 ppm
  • NO2: 1.3 ppb
  • SO2: 0.4 ppb
  • CO: 0.29 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 45.6 µg/m³
  • PM10: 51.91 µg/m³
  • O3: 0.056 ppm
  • NO2: 1 ppb
  • SO2: 0.5 ppb
  • CO: 0.28 ppm

Health Recommendations:

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