What is the air quality trend in San Clemente?

Over the past 15 days, San Clemente had an average AQI of 48 based on station measurements. The worst day was 2026-08-04 with AQI 75.

How is San Clemente air quality measured?

Air quality in San Clemente 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 Clemente, United States

Name: San Clemente 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 Clemente, United States.

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

256h

PM2.5 Station

256h · 2 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-08-08	41	35–45	9.9 µg/m³	3h	2
2026-08-07	55	17–148	16.1 µg/m³	17h	2
2026-08-06	63	12–160	21.0 µg/m³	18h	2
2026-08-05	72	17–163	25.8 µg/m³	15h	2
2026-08-04	75	20–171	29.9 µg/m³	16h	2
2026-08-03	47	2–144	14.1 µg/m³	17h	1
2026-08-02	43	5–80	11.4 µg/m³	15h	2
2026-08-01	52	25–70	14.0 µg/m³	17h	2
2026-07-31	43	9–117	11.3 µg/m³	20h	2
2026-07-30	48	2–87	12.8 µg/m³	12h	2
2026-07-29	41	14–69	10.4 µg/m³	20h	1
2026-07-28	50	20–102	13.9 µg/m³	20h	2
2026-07-27	33	17–68	8.2 µg/m³	24h	2
2026-07-26	32	13–54	7.8 µg/m³	24h	2
2026-07-25	38	20–62	9.4 µg/m³	18h	2

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