What is the air quality in San José today?

The current Air Quality Index (AQI) in San José is 25 (Good). PM2.5 concentration is 5.91 µg/m³.

What is the temperature in San José right now?

The current temperature in San José is 26.3°C (feels like 26.3°C). Humidity is 63.8% and wind speed is 21.7 km/h.

Is it safe to go outside in San José?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 24.9 (Extreme).

Air Quality in San José, Costa Rica

Drizzle

26.3°C · 63.8% humidity

26.3°

Feels 26.3°

Good

Air quality is satisfactory. Enjoy outdoor activities.

1 station

Nearby Monitoring Stations

AQI Forecast

25 9am

25 12pm

25 3pm

25 6pm

25 9pm

25 12am

25 3am

25 6am

Air Quality Index Trend

45h · 1 stn

View full history →

San José's air quality is influenced by vehicle emissions, industrial activity, and seasonal agricultural burning. Pollution patterns vary with dry and wet seasons.

63.8%

Humidity

21.7 km/h

Wind WSW

1012.6 hPa

Pressure

24.9

UV Extreme

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

5.91 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for San José?

Temperature & Precipitation

PM2.5 Trend

45h · 1 station

PM2.55.91 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX24.9

Extreme

Station readings (1 station within 25 km)

5.91

Median

5.91

Average

5.91

Low

5.91

High

PM2.5 µg/m³ · Model: 5.9 · Bias: -0.0

What is the 7-day forecast for San José?

09-05

26.3° 17.9°

8.5 mm

09-06

22.0° 18.1°

16.38 mm

09-07

27.1° 17.9°

11.63 mm

09-08

25.7° 18.1°

7.19 mm

09-09

24.6° 18.3°

17.19 mm

09-10

24.2° 17.7°

10.06 mm

09-11

21.2° 17.7°

14.56 mm

Both models agree Avg diff: 1.2°C

Where are air quality stations near San José?

NASA GSFC Rutgers Calib. N13

4.8 km PM2.5: 5.9 µg/m³

What cities are near San José?

25 Calle Blancos 25 Colima 25 San Juan 25 Guadalupe 25 San Pedro 25 San Felipe 25 San Vicente 25 San Vicente de Moravia 25 San Rafael 25 Curridabat

Get AQI alerts for San José

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ModerateAQI > 50 Unhealthy for Sensitive GroupsAQI > 100 UnhealthyAQI > 150 Very UnhealthyAQI > 200

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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 2026-09-05T18:59 UTC.