Air Quality in San José, Costa Rica
Overcast
18.2°C · 93.2% humidity
18.2°
Feels 18.2°
18
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station
Nearby Monitoring Stations
San José's air quality — share it
AQI Forecast
24
5am
24
24
18
8am
20
21
22
11am
25
26
24
2pm
26
25
34
5pm
27
27
27
8pm
34
54
54
11pm
34
25
25
2am
25
25
Air Quality Index Trend
46h · 1 stnSan José's air quality is influenced by vehicle emissions, industrial activity, and seasonal agricultural burning. Pollution patterns vary with dry and wet seasons.
93.2%
Humidity
22.1 km/h
Wind NE
1013.0 hPa
Pressure
1.4
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
4.23 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for San José?
Temperature & Precipitation
PM2.5 Trend
46h · 1 stationPM2.54.23 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX1.4
Low
Station readings (1 station within 25 km)
4.23
Median
4.23
Average
4.23
Low
4.23
High
PM2.5 µg/m³ · Model: 6.0 · Bias: +1.8
Both models agree
Avg diff: 1.0°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 2026-06-09T14:36 UTC.