What is the air quality trend in San Rafael?

Over the past 3 days, San Rafael had an average AQI of 24 based on station measurements. The worst day was 2026-10-19 with AQI 25.

How is San Rafael air quality measured?

Air quality in San Rafael is measured by ground-level monitoring stations that report PM2.5 and PM10 concentrations hourly. CERNS.IO aggregates readings from nearby stations and converts PM2.5 to the US EPA Air Quality Index (AQI) scale.

Air Quality History for San Rafael, Costa Rica

Name: San Rafael Air Quality History
Creator: CERNS.IO
License: https://creativecommons.org/licenses/by/4.0/

Historical PM2.5 and AQI trend from monitoring stations near San Rafael, Costa Rica.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

42h

PM2.5 Station

42h · 1 station

Temperature GFS model

8pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-21	22	19–27	5.3 µg/m³	19h	1
2026-10-20	25	23–29	6.1 µg/m³	21h	1
2026-10-19	25	25–25	6.1 µg/m³	2h	1

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