Hourly Weather | Today › Tuesday, October 13, 2026
Active Weather Warnings
Napa, California
7 PM
Night
66°
Feels Like 64°
0
Humidity: 29%
UV Index: 0
Wind: 6 mph
8 PM
Cloudy Night
63°
Feels Like 63°
0
Humidity: 40%
UV Index: 0
Wind: 6 mph
9 PM
Night
59°
Feels Like 59°
0
Humidity: 47%
UV Index: 0
Wind: 5 mph
10 PM
Night
55°
Feels Like 55°
0
Humidity: 55%
UV Index: 0
Wind: 4 mph
11 PM
Night
52°
Feels Like 54°
0
Humidity: 63%
UV Index: 0
Wind: 2 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 4.29 µg/m³
  • PM10: 11.39 µg/m³
  • O3: 0.042 ppm
  • NO2: 0.6 ppb
  • SO2: 0.4 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.24 µg/m³
  • PM10: 11.12 µg/m³
  • O3: 0.041 ppm
  • NO2: 0.6 ppb
  • SO2: 0.4 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.04 µg/m³
  • PM10: 10.25 µg/m³
  • O3: 0.041 ppm
  • NO2: 0.6 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 PM
38 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.03 µg/m³
  • PM10: 10.01 µg/m³
  • O3: 0.041 ppm
  • NO2: 0.6 ppb
  • SO2: 0.3 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.1 µg/m³
  • PM10: 10.03 µg/m³
  • O3: 0.040 ppm
  • NO2: 0.6 ppb
  • SO2: 0.3 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

Weather Alerts and Warnings for Napa

Minor Expected Likely

Coastal Flood Advisory

Coastal Flood Advisory issued October 13 at 2:36PM PDT until October 14 at 4:00PM PDT by NWS San Francisco CA
Oct 13, 2:36 PM → Oct 14, 4:00 PM
WHAT: Up to 0.8 ft of inundation above ground level is
possible in low-lying areas near shorelines and tidal waterways.

WHERE: Bayshore locations along the San Pablo Bay.

WHEN: Until 4 PM PDT Wednesday.

IMPACTS: Flooding of lots, parks, and roads with only
isolated road closures expected. High tides will result in
flooding along coastal trails, cut off access to some low-
lying beaches and coastal areas, and bring water and waves
farther up the beach than typical. Dangerous conditions are
forecast along the shoreline. Hazards include sneaker waves,
strong rip currents, and large breaking waves.

ADDITIONAL DETAILS: At the San Francisco tidal gauge, high tide
is expected to be 0.8 ft above normal (6.62 ft MLLW) at 1:46 PM
Wednesday 10/14. This prediction includes up to 0.9 ft of surge
that will enhance the astronomical tide and flooding threat.
High tide varies up to 90 minutes earlier or later along the
Pacific Coast and through the San Francisco Bay, respectively.
+ Read More
If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property.
Updated: Oct 13, 4:32 PM Source: NWS Alert