Today | Weather | Wednesday, December 24, 2025
Active Weather Warnings

Weather in Santa Rosa, California

08:25 AM
Now
Cloudy Weather
52° F
Feels Like 46°
Precipitation 28 %
Wind 9 mph
UV Index (0 - 11+) 0
Humidity 92 %
Today
Rainy Weather
Day 57°
Night 48°
Precipitation 90 %
Wind 9 mph
UV Index (0 - 11+) 2

Santa Rosa Weather Forecast Updated

46 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (December 24, 2024)
Rainy Weather

Day

59°

Night

37°

Wind

7 mph

UV Index

2

Precipitation

100 %

Air Quality in Santa Rosa

NOW
48 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 0.99 µg/m³
PM10 4.18 µg/m³
O3 0.052 ppm
NO2 0.3 ppb
SO2 0.1 ppb
CO 0.10 ppm
NH3 0 µg/m³
NO 0 µg/m³
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide
NH3 – Ammonia
NO – Nitric oxide

Health Recommendations:

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

Show raw pollutant concentrations (µg/m³)
PM2.50.99 µg/m³
PM104.18 µg/m³
O3101.8 µg/m³
NO20.48 µg/m³
SO20.29 µg/m³
CO115.96 µg/m³
NH30 µg/m³
NO0 µg/m³

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, 7:38 AM Source: NWS Alert
Moderate Expected Likely

Wind Advisory

Wind Advisory issued December 24 at 5:08AM PST until December 24 at 8:00AM PST by NWS San Francisco CA
Dec 24, 5:08 AM Dec 24, 8:00 AM
WHAT: For the first Wind Advisory, southwest winds 20 to 30 mph
with gusts up to 50 mph. For the second Wind Advisory, south winds
20 to 30 mph with gusts up to 65 mph expected.

WHERE: The East Bay and San Francisco Bay Shoreline, The Santa
Clara Valley and Eastern Hills, The Santa Cruz Mountains, Most of
San Benito County and the Cholame Hills in Southeast Monterey
County, North Bay Interior Mountains, and North Bay Interior
Valleys.

WHEN: For the first Wind Advisory, until 8 AM PST this morning.
For the second Wind Advisory, 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, 5:48 AM Source: NWS Alert