Air Quality in Napa, United States

Clear
31.5°C · 20.3% humidity
31.5°
Feels 31.5°
91
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
Model forecast

Nearby Monitoring Stations

AQI Forecast
27 1pm
34
34
91 4pm
75
63
55 7pm
69
65
62 10pm
60
58
57 1am
56
55
35 4am
35
28
27 7am
27
34
34 10am
34
34
AD 728×90

Air Quality Index Trend

46h · 20 stn

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. Current PM2.5 concentration in Napa is 2.1× the WHO 24-hour guideline of 15 µg/m³.

20.3%
Humidity
18.0 km/h
Wind SSW
1009.7 hPa
Pressure
17.4
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
91
30.95 µg/m³
PM10
65
84.3 µg/m³
050100150200300500

What is the weather forecast for Napa?

Temperature & Precipitation

PM2.5 Trend

46h · 20 stations
PM2.530.95 µg/m³ ×2.1 WHO
Moderate
PM1084.3 µg/m³
Moderate
UV INDEX17.4
Extreme
AD 300×250

What is the 7-day forecast for Napa?

08-03
36.9° 10.6°
08-04
27.9° 11.0°
08-05
37.0° 12.2°
08-06
33.7° 10.9°
08-07
32.6° 13.4°
08-08
34.5° 9.5°
08-09
37.2° 10.0°
Both models agree Avg diff: 4.2°C

Where are air quality stations near Napa?

30
Vallejo, Solano, California
22.0 km PM2.5: 7.2 µg/m³
28
Vallejo, Solano, California
22.0 km PM2.5: 6.7 µg/m³
18
Vallejo, Solano, California
22.0 km PM2.5: 4.3 µg/m³

What cities are near Napa?

91 American Canyon 37 Agua Caliente 91 Vallejo 64 Suisun 63 Vacaville 96 Benicia 91 Hercules 91 Petaluma 91 Pinole 91 Novato
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Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-08-07T23:56 UTC.