Hourly Weather | Today Wednesday, March 18, 2026
Roseville, California
7 AM
Night
54°
Feels Like 54°
0
Humidity: 97%
UV Index: 0
Wind: 6 mph
8 AM
Cloudy Weather
57°
Feels Like 61°
0
Humidity: 84%
UV Index: 1
Wind: 5 mph
9 AM
Cloudy Weather
64°
Feels Like 68°
0
Humidity: 68%
UV Index: 2
Wind: 5 mph
10 AM
Cloudy Weather
72°
Feels Like 75°
0
Humidity: 60%
UV Index: 3
Wind: 5 mph
11 AM
Cloudy Weather
75°
Feels Like 81°
0
Humidity: 55%
UV Index: 4
Wind: 5 mph
12 PM
Cloudy Weather
81°
Feels Like 86°
0
Humidity: 50%
UV Index: 5
Wind: 5 mph
1 PM
Cloudy Weather
82°
Feels Like 90°
0
Humidity: 46%
UV Index: 5
Wind: 5 mph
2 PM
Cloudy Weather
84°
Feels Like 90°
0
Humidity: 44%
UV Index: 5
Wind: 5 mph
3 PM
Sunny Weather
86°
Feels Like 90°
0
Humidity: 42%
UV Index: 4
Wind: 5 mph
4 PM
Sunny Weather
88°
Feels Like 90°
0
Humidity: 40%
UV Index: 3
Wind: 5 mph
5 PM
Sunny Weather
86°
Feels Like 88°
0
Humidity: 41%
UV Index: 2
Wind: 5 mph
6 PM
Sunny Weather
84°
Feels Like 84°
0
Humidity: 44%
UV Index: 1
Wind: 5 mph
7 PM
Sunny Weather
81°
Feels Like 79°
0
Humidity: 52%
UV Index: 0
Wind: 5 mph
8 PM
Night
77°
Feels Like 75°
0
Humidity: 61%
UV Index: 0
Wind: 5 mph
9 PM
Night
73°
Feels Like 72°
0
Humidity: 69%
UV Index: 0
Wind: 5 mph
10 PM
Night
70°
Feels Like 68°
0
Humidity: 74%
UV Index: 0
Wind: 5 mph
11 PM
Night
66°
Feels Like 64°
0
Humidity: 79%
UV Index: 0
Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

7 AM
157 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 69.5 µg/m³
  • PM10: 77.38 µg/m³
  • O3: 0.023 ppm
  • NO2: 15.8 ppb
  • SO2: 2 ppb
  • CO: 0.38 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

8 AM
159 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 73.09 µg/m³
  • PM10: 81.55 µg/m³
  • O3: 0.019 ppm
  • NO2: 17.9 ppb
  • SO2: 1.9 ppb
  • CO: 0.40 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

9 AM
160 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 73.9 µg/m³
  • PM10: 83.07 µg/m³
  • O3: 0.018 ppm
  • NO2: 18.1 ppb
  • SO2: 1.7 ppb
  • CO: 0.43 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

10 AM
158 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 71.13 µg/m³
  • PM10: 80.66 µg/m³
  • O3: 0.020 ppm
  • NO2: 17.2 ppb
  • SO2: 1.6 ppb
  • CO: 0.46 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

11 AM
156 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 66.46 µg/m³
  • PM10: 76.01 µg/m³
  • O3: 0.027 ppm
  • NO2: 17.2 ppb
  • SO2: 1.6 ppb
  • CO: 0.47 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

12 PM
153 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 60.32 µg/m³
  • PM10: 67.69 µg/m³
  • O3: 0.049 ppm
  • NO2: 13 ppb
  • SO2: 2.4 ppb
  • CO: 0.38 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

1 PM
152 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 59.44 µg/m³
  • PM10: 66.06 µg/m³
  • O3: 0.069 ppm
  • NO2: 9.8 ppb
  • SO2: 2.6 ppb
  • CO: 0.34 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

2 PM
163 AQI
Unhealthy air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 58.71 µg/m³
  • PM10: 64.66 µg/m³
  • O3: 0.090 ppm
  • NO2: 6.7 ppb
  • SO2: 2.7 ppb
  • CO: 0.32 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

3 PM
188 AQI
Unhealthy air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 53.54 µg/m³
  • PM10: 58.83 µg/m³
  • O3: 0.100 ppm
  • NO2: 5.2 ppb
  • SO2: 2.6 ppb
  • CO: 0.29 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

4 PM
192 AQI
Unhealthy air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 54.21 µg/m³
  • PM10: 59.55 µg/m³
  • O3: 0.102 ppm
  • NO2: 5.8 ppb
  • SO2: 2.3 ppb
  • CO: 0.29 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

5 PM
191 AQI
Unhealthy air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 53.39 µg/m³
  • PM10: 58.88 µg/m³
  • O3: 0.102 ppm
  • NO2: 7.5 ppb
  • SO2: 2.2 ppb
  • CO: 0.29 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

6 PM
176 AQI
Unhealthy air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 51.52 µg/m³
  • PM10: 57.3 µg/m³
  • O3: 0.095 ppm
  • NO2: 11.7 ppb
  • SO2: 2.2 ppb
  • CO: 0.31 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

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

Pollutant Concentrations:

  • PM2.5: 50.27 µg/m³
  • PM10: 56.53 µg/m³
  • O3: 0.081 ppm
  • NO2: 18.1 ppb
  • SO2: 2.1 ppb
  • CO: 0.34 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 49.99 µg/m³
  • PM10: 56.95 µg/m³
  • O3: 0.065 ppm
  • NO2: 21.9 ppb
  • SO2: 2.1 ppb
  • CO: 0.37 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 52.73 µg/m³
  • PM10: 60.43 µg/m³
  • O3: 0.053 ppm
  • NO2: 24.2 ppb
  • SO2: 2 ppb
  • CO: 0.40 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 55.96 µg/m³
  • PM10: 64.39 µg/m³
  • O3: 0.044 ppm
  • NO2: 25.9 ppb
  • SO2: 2 ppb
  • CO: 0.42 ppm

Health Recommendations:

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

11 PM
151 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 56.94 µg/m³
  • PM10: 65.97 µg/m³
  • O3: 0.036 ppm
  • NO2: 27.2 ppb
  • SO2: 1.9 ppb
  • CO: 0.43 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.