Air Quality in Alajuela, Costa Rica
Rain
18.4°C · 98.4% humidity
18.4°
Feels 18.4°
20
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station
Nearby Monitoring Stations
Alajuela's air quality — share it
AQI Forecast
27
11pm
27
25
20
2am
21
22
23
5am
24
24
24
8am
25
25
24
11am
25
25
25
2pm
25
34
34
5pm
25
27
27
8pm
34
34
Air Quality Index Trend
44h · 1 stnAlajuela's air quality is influenced by vehicle emissions, industrial activity, and seasonal agricultural burning. Pollution patterns vary with dry and wet seasons.
98.4%
Humidity
10.6 km/h
Wind NE
1012.9 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
4.75 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for Alajuela?
Temperature & Precipitation
PM2.5 Trend
44h · 1 stationPM2.54.75 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
Station readings (1 station within 25 km)
4.75
Median
4.75
Average
4.75
Low
4.75
High
PM2.5 µg/m³ · Model: 6.0 · Bias: +1.2
What is the 7-day forecast for Alajuela?
07-22
22.8° 18.0°
25.13 mm
07-23
23.0° 17.9°
15.94 mm
07-24
23.3° 18.4°
21.94 mm
07-25
27.3° 18.1°
13.94 mm
07-26
24.7° 17.5°
10.25 mm
07-27
26.0° 16.9°
10.44 mm
07-28
25.5° 17.2°
8.56 mm
Both models agree
Avg diff: 1.3°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 2026-07-22T08:29 UTC.