Air Quality in Napa, United States
Windy
27.6°C · 24.6% humidity
27.6°
Feels 27.6°
27
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station
Nearby Monitoring Stations
Napa's air quality — share it
AQI Forecast
24
11am
24
24
27
2pm
24
25
25
5pm
27
27
27
8pm
34
34
34
11pm
34
34
34
2am
34
34
34
5am
25
25
25
8am
25
25
Air Quality Index Trend
46h · 25 stnNapa's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration. Current PM2.5 concentration in Napa is 1.3× the WHO annual guideline of 5 µg/m³.
24.6%
Humidity
42.3 km/h
Wind W
1015.2 hPa
Pressure
19.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
6.5 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for Napa?
Temperature & Precipitation
PM2.5 Trend
46h · 25 stationsPM2.56.5 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX19.9
Extreme
Station readings (1 station within 25 km)
6.5
Median
6.5
Average
6.5
Low
6.5
High
PM2.5 µg/m³ · Model: 6.15 · Bias: -0.3
What is the 7-day forecast for Napa?
05-28
25.9° 6.3°
05-29
27.6° 11.3°
05-30
25.0° 13.9°
05-31
32.6° 16.1°
0.06 mm
06-01
33.6° 15.0°
06-02
28.0° 11.2°
06-03
30.3° 4.5°
Both models agree
Avg diff: 4.6°C
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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 2026-05-28T21:46 UTC.