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Today Hourly 7 days 30 days Air Quality
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Hourly Weather | Today › Monday, May 18, 2026
Active Weather Warnings
Roseville, California
5 AM
Night
57°
Feels Like 54°
0
Humidity: 35%
UV Index: 0
Wind: 9 mph
6 AM
Sunny Weather
55°
Feels Like 52°
0
Humidity: 39%
UV Index: 0
Wind: 10 mph
7 AM
Sunny Weather
61°
Feels Like 57°
0
Humidity: 34%
UV Index: 1
Wind: 12 mph
8 AM
Sunny Weather
64°
Feels Like 64°
0
Humidity: 28%
UV Index: 2
Wind: 12 mph
9 AM
Sunny Weather
70°
Feels Like 70°
0
Humidity: 26%
UV Index: 3
Wind: 12 mph
10 AM
Sunny Weather
73°
Feels Like 75°
0
Humidity: 22%
UV Index: 5
Wind: 12 mph
11 AM
Sunny Weather
77°
Feels Like 81°
0
Humidity: 19%
UV Index: 7
Wind: 12 mph
12 PM
Sunny Weather
79°
Feels Like 84°
0
Humidity: 18%
UV Index: 9
Wind: 12 mph
1 PM
Sunny Weather
81°
Feels Like 86°
0
Humidity: 17%
UV Index: 10
Wind: 13 mph
2 PM
Sunny Weather
82°
Feels Like 88°
0
Humidity: 16%
UV Index: 9
Wind: 13 mph
3 PM
Sunny Weather
84°
Feels Like 86°
0
Humidity: 15%
UV Index: 7
Wind: 14 mph
4 PM
Sunny Weather
84°
Feels Like 84°
0
Humidity: 15%
UV Index: 5
Wind: 14 mph
5 PM
Sunny Weather
84°
Feels Like 82°
0
Humidity: 15%
UV Index: 3
Wind: 13 mph
6 PM
Sunny Weather
82°
Feels Like 81°
0
Humidity: 16%
UV Index: 2
Wind: 13 mph
7 PM
Sunny Weather
81°
Feels Like 79°
0
Humidity: 18%
UV Index: 1
Wind: 10 mph
8 PM
Sunny Weather
77°
Feels Like 75°
0
Humidity: 22%
UV Index: 0
Wind: 8 mph
9 PM
Night
73°
Feels Like 70°
0
Humidity: 25%
UV Index: 0
Wind: 7 mph
10 PM
Night
70°
Feels Like 66°
0
Humidity: 29%
UV Index: 0
Wind: 7 mph
11 PM
Night
66°
Feels Like 64°
0
Humidity: 32%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.71 µg/m³
  • O3: 0.047 ppm
  • NO2: 1.1 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.73 µg/m³
  • O3: 0.045 ppm
  • NO2: 1.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.8 µg/m³
  • O3: 0.044 ppm
  • NO2: 1.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.91 µg/m³
  • O3: 0.044 ppm
  • NO2: 1.6 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.51 µg/m³
  • PM10: 1.01 µg/m³
  • O3: 0.045 ppm
  • NO2: 1.7 ppb
  • SO2: 0.3 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.58 µg/m³
  • PM10: 1.15 µg/m³
  • O3: 0.047 ppm
  • NO2: 1.5 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.72 µg/m³
  • PM10: 1.37 µg/m³
  • O3: 0.049 ppm
  • NO2: 1.3 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
49 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.02 µg/m³
  • PM10: 1.7 µg/m³
  • O3: 0.053 ppm
  • NO2: 1.1 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
57 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.34 µg/m³
  • PM10: 2.06 µg/m³
  • O3: 0.056 ppm
  • NO2: 0.9 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

2 PM
66 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.59 µg/m³
  • PM10: 2.35 µg/m³
  • O3: 0.059 ppm
  • NO2: 0.8 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

3 PM
76 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.71 µg/m³
  • PM10: 2.57 µg/m³
  • O3: 0.062 ppm
  • NO2: 0.9 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

4 PM
82 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.81 µg/m³
  • PM10: 2.83 µg/m³
  • O3: 0.064 ppm
  • NO2: 1.1 ppb
  • SO2: 0.4 ppb
  • CO: 0.11 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

5 PM
82 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.9 µg/m³
  • PM10: 3.1 µg/m³
  • O3: 0.064 ppm
  • NO2: 1.4 ppb
  • SO2: 0.5 ppb
  • CO: 0.11 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

6 PM
73 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.08 µg/m³
  • PM10: 3.55 µg/m³
  • O3: 0.061 ppm
  • NO2: 2.5 ppb
  • SO2: 0.6 ppb
  • CO: 0.12 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

7 PM
56 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.31 µg/m³
  • PM10: 4.2 µg/m³
  • O3: 0.056 ppm
  • NO2: 4.3 ppb
  • SO2: 0.8 ppb
  • CO: 0.13 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

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

Pollutant Concentrations:

  • PM2.5: 2.48 µg/m³
  • PM10: 4.81 µg/m³
  • O3: 0.050 ppm
  • NO2: 6 ppb
  • SO2: 0.9 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.81 µg/m³
  • PM10: 5.69 µg/m³
  • O3: 0.043 ppm
  • NO2: 7.8 ppb
  • SO2: 1 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.4 µg/m³
  • PM10: 7.01 µg/m³
  • O3: 0.036 ppm
  • NO2: 10.2 ppb
  • SO2: 1 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.93 µg/m³
  • PM10: 8.21 µg/m³
  • O3: 0.030 ppm
  • NO2: 12 ppb
  • SO2: 0.9 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

Current Real-Time Air Quality Report

Weather Alerts and Warnings for Roseville

Severe Future Possible

Fire Weather Watch

Fire Weather Watch issued May 14 at 10:24AM PDT until May 18 at 8:00PM PDT by NWS Sacramento CA
May 16, 5:00 AM → May 18, 8:00 PM
The National Weather Service in Sacramento has issued a Fire
Weather Watch for gusty winds and low humidity, which is in
effect from late Friday night through Monday evening.

* Winds...North winds 15 to 25 mph. Gusts 35 to 45 mph, locally up
to 50 mph around the Delta.

* Humidity...Daytime minimum humidities of 9 to 15%.

* Highest Threat...Along the Interstate 5 corridor in the
Sacramento Valley. Strongest winds are expected Sunday into
Monday.

* Impacts...The combination of gusty winds and low humidity can
cause fire to rapidly grow in size and intensity. Outdoor
burning is not recommended
+ Read More
A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings.
Updated: May 15, 8:56 AM Source: NWS Alert
Severe Expected Likely

Red Flag Warning

Red Flag Warning issued May 17 at 12:07PM PDT until May 18 at 8:00PM PDT by NWS Sacramento CA
May 17, 12:07 PM → May 18, 8:00 PM
* Winds...North winds 20 to 30 mph. Gusts 35 to 45 mph, locally
up to 50 mph around the Delta and the western Sacramento
Valley.

* Humidity...Daytime minimum humidities of 7 to 15%. Overnight
maximum relative humidities of 20 to 45%.

* Highest Threat...Along and west of the Interstate 5 corridor
in the Sacramento Valley. Strongest winds are expected today.

* Impacts...The combination of gusty winds and low humidity can
cause fire to rapidly grow in size and intensity. Outdoor
burning is not recommended.
+ Read More
A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.
Updated: May 18, 4:07 AM Source: NWS Alert

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