What is the air quality trend in Monterey?

Over the past 15 days, Monterey had an average AQI of 27 based on station measurements. The worst day was 2026-05-17 with AQI 42.

How is Monterey air quality measured?

Air quality in Monterey 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 Monterey, United States

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

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

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

333h

PM2.5 Station

333h · 31 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-05-30	15	14–16	3.6 µg/m³	6h	32
2026-05-29	18	14–23	4.4 µg/m³	24h	31
2026-05-28	26	13–46	6.3 µg/m³	24h	29
2026-05-27	23	19–38	5.5 µg/m³	24h	31
2026-05-26	21	15–25	4.9 µg/m³	24h	31
2026-05-25	20	16–25	4.9 µg/m³	24h	32
2026-05-24	24	21–28	5.8 µg/m³	24h	32
2026-05-23	28	25–33	6.7 µg/m³	24h	31
2026-05-22	28	19–42	6.8 µg/m³	24h	31
2026-05-21	37	32–43	8.9 µg/m³	24h	32
2026-05-20	35	29–52	8.5 µg/m³	24h	32
2026-05-19	29	23–35	7.0 µg/m³	24h	32
2026-05-18	26	18–41	6.3 µg/m³	24h	32
2026-05-17	42	34–51	10.2 µg/m³	24h	31
2026-05-16	40	36–44	9.7 µg/m³	15h	31

Back to Monterey Air Quality