What is the air quality trend in Cary?

Over the past 8 days, Cary had an average AQI of 51 based on station measurements. The worst day was 2026-07-17 with AQI 86.

How is Cary air quality measured?

Air quality in Cary 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 Cary, United States

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

Historical PM2.5 and AQI trend from monitoring stations near Cary, United States.

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

146h

PM2.5 Station

146h · 4 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-21	40	5–61	9.7 µg/m³	17h	3
2026-07-20	44	9–70	11.5 µg/m³	20h	2
2026-07-19	40	15–66	9.8 µg/m³	19h	3
2026-07-18	51	23–90	13.6 µg/m³	19h	3
2026-07-17	86	20–276	42.5 µg/m³	23h	3
2026-07-16	68	17–300	30.3 µg/m³	24h	3
2026-07-15	46	21–130	12.4 µg/m³	21h	2
2026-07-14	40	26–51	9.6 µg/m³	3h	3

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