Hourly Weather | Today Wednesday, December 24, 2025
Active Weather Warnings
Santa Rosa, California
11 AM
Cloudy Weather
55°
Feels Like 57°
37
Humidity: 77%
Wind: 7 mph
UV Index: 2
12 PM
Cloudy Weather
55°
Feels Like 55°
34
Humidity: 75%
Wind: 8 mph
UV Index: 2
1 PM
Cloudy Weather
57°
Feels Like 54°
34
Humidity: 74%
Wind: 9 mph
UV Index: 1
2 PM
Cloudy Weather
57°
Feels Like 55°
34
Humidity: 72%
Wind: 9 mph
UV Index: 1
3 PM
Cloudy Weather
55°
Feels Like 54°
40
Humidity: 74%
Wind: 8 mph
UV Index: 0
4 PM
Rainy Weather
55°
Feels Like 48°
85
Humidity: 78%
Wind: 8 mph
UV Index: 0
5 PM
Rainy Weather
54°
Feels Like 46°
85
Humidity: 82%
Wind: 9 mph
UV Index: 0
6 PM
Rainy Weather
54°
Feels Like 45°
85
Humidity: 83%
Wind: 12 mph
UV Index: 0
7 PM
Rainy Weather
52°
Feels Like 39°
75
Humidity: 93%
Wind: 15 mph
UV Index: 0
8 PM
Rainy Weather
50°
Feels Like 37°
75
Humidity: 99%
Wind: 15 mph
UV Index: 0
9 PM
Rainy Weather
50°
Feels Like 36°
75
Humidity: 99%
Wind: 22 mph
UV Index: 0
10 PM
Rainy Weather
52°
Feels Like 37°
75
Humidity: 99%
Wind: 22 mph
UV Index: 0
11 PM
Rainy Weather
52°
Feels Like 37°
75
Humidity: 98%
Wind: 21 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 1.07 µg/m³
  • PM10: 4.23 µg/m³
  • O3: 0.051 ppm
  • NO2: 0.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.27 µg/m³
  • PM10: 4.82 µg/m³
  • O3: 0.051 ppm
  • NO2: 0.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.56 µg/m³
  • PM10: 5.67 µg/m³
  • O3: 0.051 ppm
  • NO2: 0.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.65 µg/m³
  • PM10: 5.24 µg/m³
  • O3: 0.050 ppm
  • NO2: 0.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

3 PM
45 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.8 µg/m³
  • PM10: 4.92 µg/m³
  • O3: 0.049 ppm
  • NO2: 0.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.95 µg/m³
  • PM10: 4.77 µg/m³
  • O3: 0.047 ppm
  • NO2: 0.5 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.93 µg/m³
  • PM10: 4.5 µg/m³
  • O3: 0.045 ppm
  • NO2: 0.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.76 µg/m³
  • PM10: 4.6 µg/m³
  • O3: 0.044 ppm
  • NO2: 0.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.7 µg/m³
  • PM10: 5.3 µg/m³
  • O3: 0.042 ppm
  • NO2: 0.3 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.89 µg/m³
  • PM10: 6.4 µg/m³
  • O3: 0.043 ppm
  • NO2: 0.2 ppb
  • SO2: 0.1 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: 2.23 µg/m³
  • PM10: 7.64 µg/m³
  • O3: 0.046 ppm
  • NO2: 0.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.56 µg/m³
  • PM10: 8.8 µg/m³
  • O3: 0.048 ppm
  • NO2: 0.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.66 µg/m³
  • PM10: 8.03 µg/m³
  • O3: 0.049 ppm
  • NO2: 0.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

Weather Alerts and Warnings for Santa Rosa

Severe Future Possible

Flood Watch

Flood Watch issued December 23 at 11:39PM PST until December 26 at 10:00PM PST by NWS San Francisco CA
Dec 23, 11:39 PM Dec 26, 10:00 PM
WHAT: Flooding caused by excessive rainfall continues to be
possible from multiple lines of showers and thunderstorms, strong
at times, moving across the area.

WHERE: The Northern San Francisco Bay Area (Napa, Sonoma, and
Marin counties).

WHEN: Through Friday evening.

IMPACTS: Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Creeks and streams may rise out of their banks. Low water crossings
may become flooded. Flooding may occur in poor drainage and urban
areas.

ADDITIONAL DETAILS:
- Multiple rounds of moderate to heavy rainfall are expected across
the North Bay through Friday evening. An additional 3-5" is
possible over the North Bay Mountains and 2-3" over the North Bay
Valleys by Friday. Nuisance flooding will increase throughout the
week with sharp rises in smaller creeks and minor flooding along
some of the mainstream rivers (Russian River, Napa River). Debris
flows are possible particularly for the Pickett Burn Scar.
- http://www.weather.gov/safety/flood
+ Read More
You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.
Updated: Dec 24, 9:30 AM Source: NWS Alert
Moderate Expected Likely

Wind Advisory

Wind Advisory issued December 24 at 7:31AM PST until December 25 at 10:00AM PST by NWS San Francisco CA
Dec 24, 8:00 PM Dec 25, 10:00 AM
WHAT: South winds 20 to 30 mph with gusts up to 55 mph expected.

WHERE: The East Bay and San Francisco Bay Shoreline, The Santa
Clara Valley and Eastern Hills, The Marin Hills, The Santa Cruz
Mountains, Most of San Benito County and the Cholame Hills in
Southeast Monterey County, North Bay Interior Mountains, North Bay
Interior Valleys, and Southern Salinas Valley/Arroyo Seco and Lake
San Antonio.

WHEN: From 8 PM this evening to 10 AM PST Thursday.

IMPACTS: Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.
Strong winds may move loose debris, result in minor damage
property, and cause sporadic power outages. Travel could become
difficult, especially for high profile vehicles. The combination of
wind and moist soils will increase the risk for downed trees.
+ Read More
Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution.
Updated: Dec 24, 9:30 AM Source: NWS Alert