Air Quality in San Francisco, El Salvador
Drizzle
31.5°C · 43.7% humidity
31.5°
Feels 34.2°
24
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station
Nearby Monitoring Stations
San Francisco's air quality — share it
AQI Forecast
Calibrated
0
10am
0
17
24
1pm
22
21
20
4pm
19
18
1
7pm
1
17
17
10pm
0
0
17
1am
17
17
17
4am
17
17
0
7am
0
0
Station readings
33
15
CAMS model
adj -37
34
34
54
54
54
54
54
54
54
34
34
54
54
34
34
54
54
54
54
54
54
34
34
34
Air Quality Index Trend
20h · 1 stnSan Francisco's air quality is influenced by vehicle emissions, industrial activity, and seasonal agricultural burning. Pollution patterns vary with dry and wet seasons.
43.7%
Humidity
39.2 km/h
Wind ESE
1012.5 hPa
Pressure
24.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
5.75 µg/m³
PM10
20.55 µg/m³
050100150200300500
What is the weather forecast for San Francisco?
Temperature & Precipitation
PM2.5 Trend
20h · 1 stationPM2.55.75 µg/m³
✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX24.9
Extreme
Station readings (1 station within 25 km)
5.75
Median
5.75
Average
5.75
Low
5.75
High
PM2.5 µg/m³ · Model: 9.65 · Bias: +3.9
What is the 7-day forecast for San Francisco?
09-05
31.5° 21.6°
25.88 mm
09-06
33.7° 20.4°
15.62 mm
09-07
34.5° 20.1°
3.0 mm
09-08
31.7° 21.1°
0.5 mm
09-09
31.4° 19.9°
23.62 mm
09-10
34.4° 20.5°
7.06 mm
09-11
31.8° 19.9°
22.94 mm
Both models agree
Avg diff: 3.7°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 2026-09-05T19:39 UTC.