What is the air quality trend in San Marino?

Over the past 8 days, San Marino had an average AQI of 32 based on station measurements. The worst day was 2026-06-08 with AQI 42.

How is San Marino air quality measured?

Air quality in San Marino 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 Marino, San Marino

Name: San Marino 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 Marino, San Marino.

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

168h

PM2.5 Station

168h · 2 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-06-09	25	14–35	6.0 µg/m³	5.1	13h	6
2026-06-08	42	11–155	12.5 µg/m³	4.3	24h	7
2026-06-07	37	18–197	13.0 µg/m³	3.7	24h	7
2026-06-06	34	18–86	8.8 µg/m³	3.5	24h	6
2026-06-05	24	8–46	5.7 µg/m³	3.2	24h	6
2026-06-04	26	15–55	6.2 µg/m³	4.6	24h	6
2026-06-03	39	17–147	11.0 µg/m³	6.1	24h	6
2026-06-02	29	14–38	6.9 µg/m³	8.0	11h	6

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