What is the air quality trend in Guaratinguetá?

Over the past 21 days, Guaratinguetá had an average AQI of 65 based on station measurements. The worst day was 2026-06-04 with AQI 99.

How is Guaratinguetá air quality measured?

Air quality in Guaratinguetá 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 Guaratinguetá, Brazil

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

Historical PM2.5 and AQI trend from monitoring stations near Guaratinguetá, Brazil.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

361h

PM2.5 Station

361h · 2 stations

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-06-09	54	8–102	16.2 µg/m³	8h	2
2026-06-08	77	8–156	25.3 µg/m³	17h	2
2026-06-07	74	20–157	24.6 µg/m³	17h	2
2026-06-06	81	14–256	35.3 µg/m³	23h	2
2026-06-05	77	20–155	25.2 µg/m³	21h	2
2026-06-04	99	8–296	46.9 µg/m³	19h	2
2026-06-03	78	13–151	26.1 µg/m³	18h	2
2026-06-02	84	22–185	31.9 µg/m³	22h	2
2026-06-01	41	9–114	11.9 µg/m³	17h	2
2026-05-31	29	12–75	7.4 µg/m³	17h	1
2026-05-30	38	12–59	9.4 µg/m³	16h	1
2026-05-29	41	18–97	11.3 µg/m³	17h	1
2026-05-28	71	34–157	22.6 µg/m³	20h	1
2026-05-27	58	31–167	17.9 µg/m³	16h	1
2026-05-26	58	2–140	17.1 µg/m³	17h	2
2026-05-25	78	11–191	31.0 µg/m³	17h	2
2026-05-24	93	16–235	44.7 µg/m³	16h	1
2026-05-23	73	3–231	33.9 µg/m³	18h	1
2026-05-22	50	13–161	15.6 µg/m³	15h	2
2026-05-21	73	2–347	33.0 µg/m³	20h	1
2026-05-20	56	16–147	17.6 µg/m³	10h	1

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