Air Quality in San Francisco, El Salvador
Rain
21.1°C · 96.1% humidity
21.1°
Feels 21.1°
19
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station
Nearby Monitoring Stations
San Francisco's air quality — share it
AQI Forecast
Calibrated
44
11pm
44
44
19
2am
26
31
35
5am
37
39
41
8am
22
13
14
11am
14
14
17
2pm
17
24
24
5pm
24
44
44
8pm
44
44
Station readings
22
16
CAMS model
adj -10
54
54
54
54
54
54
54
54
54
54
34
25
25
25
25
27
27
34
34
34
54
54
54
54
Air Quality Index Trend
21h · 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.
96.1%
Humidity
19.3 km/h
Wind ENE
1011.1 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
4.53 µg/m³
PM10
20.55 µg/m³
050100150200300500
What is the weather forecast for San Francisco?
Temperature & Precipitation
PM2.5 Trend
21h · 1 stationPM2.54.53 µg/m³
✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX0.7
Low
Station readings (1 station within 25 km)
4.53
Median
4.53
Average
4.53
Low
4.53
High
PM2.5 µg/m³ · Model: 10.0 · Bias: +5.5
What is the 7-day forecast for San Francisco?
07-22
33.4° 20.8°
12.44 mm
07-23
33.4° 19.8°
3.38 mm
07-24
32.3° 20.6°
9.75 mm
07-25
34.0° 20.1°
2.5 mm
07-26
32.7° 20.1°
0.06 mm
07-27
30.9° 19.1°
2.69 mm
07-28
33.4° 20.1°
14.94 mm
Both models agree
Avg diff: 3.3°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 2026-07-22T08:31 UTC.