What is the air quality in Napa today?

The current Air Quality Index (AQI) in Napa is 18 (Good). PM2.5 concentration is 4.15 µg/m³.

What is the temperature in Napa right now?

The current temperature in Napa is 27.1°C (feels like 27.1°C). Humidity is 16.9% and wind speed is 11.7 km/h.

Is it safe to go outside in Napa?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.0 (Low).

Air Quality in Napa, United States

Clear

27.1°C · 16.9% humidity

27.1°

Feels 27.1°

Good

Air quality is satisfactory. Enjoy outdoor activities.

Calibrated model

Nearby Monitoring Stations

AQI Forecast

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Air Quality Index Trend

45h · 19 stn

View full history →

Napa's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.

16.9%

Humidity

11.7 km/h

Wind SSE

1018.0 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

4.15 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Napa?

Temperature & Precipitation

PM2.5 Trend

45h · 19 stations

PM2.54.15 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.0

Low

What is the 7-day forecast for Napa?

10-20

29.9° 12.8°

10-21

25.4° 11.8°

10-22

29.6° 11.6°

10-23

23.0° 13.2°

10-24

25.2° 11.6°

10-25

25.9° 8.8°

4.63 mm

10-26

25.2° 12.6°

Both models agree Avg diff: 6.6°C

What cities are near Napa?

13 American Canyon 18 Agua Caliente 15 Vallejo 18 Suisun 20 Vacaville 15 Benicia 18 Hercules 17 Petaluma 19 Pinole 12 Novato

Get AQI alerts for Napa

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ModerateAQI > 50 Unhealthy for Sensitive GroupsAQI > 100 UnhealthyAQI > 150 Very UnhealthyAQI > 200

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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-10-20T20:05 UTC.