Hourly Weather | Today Wednesday, March 18, 2026
Roseville, California
6 AM
Night
55°
Feels Like 54°
0
Humidity: 86%
UV Index: 0
Wind: 6 mph
7 AM
Night
54°
Feels Like 54°
0
Humidity: 93%
UV Index: 0
Wind: 6 mph
8 AM
Cloudy Weather
59°
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)

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

Pollutant Concentrations:

  • PM2.5: 69.14 µg/m³
  • PM10: 76.72 µg/m³
  • O3: 0.026 ppm
  • NO2: 15.5 ppb
  • SO2: 2.1 ppb
  • CO: 0.37 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 72.38 µg/m³
  • PM10: 79.93 µg/m³
  • O3: 0.023 ppm
  • NO2: 15.6 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
160 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 74.94 µg/m³
  • PM10: 82.99 µg/m³
  • O3: 0.020 ppm
  • NO2: 17.5 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: 74.83 µg/m³
  • PM10: 83.5 µg/m³
  • O3: 0.018 ppm
  • NO2: 17.6 ppb
  • SO2: 1.7 ppb
  • CO: 0.44 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: 70.33 µg/m³
  • PM10: 79.22 µg/m³
  • O3: 0.020 ppm
  • NO2: 16.5 ppb
  • SO2: 1.4 ppb
  • CO: 0.46 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 63.69 µg/m³
  • PM10: 72.39 µg/m³
  • O3: 0.026 ppm
  • NO2: 16.4 ppb
  • SO2: 1.4 ppb
  • CO: 0.46 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 41.48 µg/m³
  • PM10: 47.01 µg/m³
  • O3: 0.060 ppm
  • NO2: 9.2 ppb
  • SO2: 2.5 ppb
  • CO: 0.31 ppm

Health Recommendations:

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

1 PM
129 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 41.21 µg/m³
  • PM10: 46.31 µg/m³
  • O3: 0.079 ppm
  • NO2: 6.4 ppb
  • SO2: 2.6 ppb
  • CO: 0.28 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 46.99 µg/m³
  • PM10: 51.99 µg/m³
  • O3: 0.093 ppm
  • NO2: 5 ppb
  • SO2: 2.5 ppb
  • CO: 0.27 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 43.51 µg/m³
  • PM10: 47.92 µg/m³
  • O3: 0.092 ppm
  • NO2: 4.4 ppb
  • SO2: 1.9 ppb
  • CO: 0.25 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 41.97 µg/m³
  • PM10: 46.29 µg/m³
  • O3: 0.090 ppm
  • NO2: 4.9 ppb
  • SO2: 1.6 ppb
  • CO: 0.25 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 40.97 µg/m³
  • PM10: 45.44 µg/m³
  • O3: 0.088 ppm
  • NO2: 6.2 ppb
  • SO2: 1.5 ppb
  • CO: 0.25 ppm

Health Recommendations:

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

6 PM
132 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 40.09 µg/m³
  • PM10: 44.98 µg/m³
  • O3: 0.080 ppm
  • NO2: 10.2 ppb
  • SO2: 1.4 ppb
  • CO: 0.27 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 39.46 µg/m³
  • PM10: 45.14 µg/m³
  • O3: 0.066 ppm
  • NO2: 17.4 ppb
  • SO2: 1.4 ppb
  • CO: 0.32 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 39.45 µg/m³
  • PM10: 46.16 µg/m³
  • O3: 0.052 ppm
  • NO2: 22.8 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
119 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 42.81 µg/m³
  • PM10: 50.54 µg/m³
  • O3: 0.042 ppm
  • NO2: 25.7 ppb
  • SO2: 1.4 ppb
  • CO: 0.39 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: 47.36 µg/m³
  • PM10: 55.97 µg/m³
  • O3: 0.036 ppm
  • NO2: 27.2 ppb
  • SO2: 1.5 ppb
  • CO: 0.41 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 51.33 µg/m³
  • PM10: 60.66 µg/m³
  • O3: 0.030 ppm
  • NO2: 28.2 ppb
  • SO2: 1.6 ppb
  • CO: 0.43 ppm

Health Recommendations:

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