Air Quality in San Luis Obispo, United States
Windy
20.5°C · 58.7% humidity
20.5°
Feels 20.5°
61
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
Calibrated model
Nearby Monitoring Stations
San Luis Obispo's air quality — share it
AQI Forecast
54
6pm
54
54
61
9pm
59
58
57
12am
56
55
55
3am
55
54
54
6am
54
54
54
9am
54
54
54
12pm
54
54
54
3pm
54
54
Air Quality Index Trend
24h · 1 stnSan Luis Obispo'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 San Luis Obispo is 1.1× the WHO 24-hour guideline of 15 µg/m³.
58.7%
Humidity
40.2 km/h
Wind W
1011.6 hPa
Pressure
17.4
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
16.75 µg/m³
PM10
34.3 µg/m³
050100150200300500
What is the weather forecast for San Luis Obispo?
Temperature & Precipitation
PM2.5 Trend
24h · 1 stationPM2.516.75 µg/m³
×1.1 WHO
Moderate
PM1034.3 µg/m³
Good
UV INDEX17.4
Extreme
What is the 7-day forecast for San Luis Obispo?
08-03
20.5° 12.7°
0.06 mm
08-04
21.5° 16.6°
08-05
25.1° 13.6°
08-06
22.1° 12.7°
08-07
21.6° 13.5°
08-08
21.7° 13.8°
0.06 mm
08-09
23.1° 12.6°
0.06 mm
Both models agree
Avg diff: 2.3°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 2026-08-08T04:00 UTC.