Air Quality in Fairfield, United States
Cloudy
20.8°C · 82.1% humidity
20.8°
Feels 20.8°
62
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
3 stations
Nearby Monitoring Stations
Fairfield's air quality — share it
AQI Forecast
54
6am
54
54
62
9am
60
58
57
12pm
56
56
55
3pm
35
35
34
6pm
34
34
34
9pm
27
25
25
12am
25
25
25
3am
25
25
Air Quality Index Trend
39h · 4 stnFairfield'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 Fairfield is 1.1× the WHO 24-hour guideline of 15 µg/m³.
82.1%
Humidity
8.3 km/h
Wind ENE
1017.7 hPa
Pressure
4.4
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5
17.16 µg/m³
PM10▲
141.15 µg/m³
050100150200300500
What is the weather forecast for Fairfield?
Temperature & Precipitation
PM2.5 Trend
39h · 4 stationsPM2.517.16 µg/m³
×1.1 WHO
Moderate
PM10141.15 µg/m³
Moderate
UV INDEX4.4
Moderate
Station readings (3 stations within 25 km)
17.16
Median
17.33
Average
15.9
Low
18.8
High
PM2.5 µg/m³ · Model: 56.72 · Bias: +39.6
What is the 7-day forecast for Fairfield?
07-21
29.6° 20.8°
1.5 mm
07-22
25.6° 21.0°
1.31 mm
07-23
21.4° 17.2°
2.0 mm
07-24
25.0° 17.7°
2.63 mm
07-25
21.4° 19.1°
10.37 mm
07-26
28.4° 18.6°
2.63 mm
07-27
27.5° 20.8°
1.31 mm
Both models agree
Avg diff: 3.4°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 2026-07-21T13:19 UTC.