What is the air quality trend in Cheyenne?

Over the past 8 days, Cheyenne had an average AQI of 51 based on station measurements. The worst day was 2026-07-17 with AQI 74.

How is Cheyenne air quality measured?

Air quality in Cheyenne 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 Cheyenne, United States

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

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

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

75h

PM2.5 Station

75h · 1 station

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-21	52	13–86	14.7 µg/m³	9h	1
2026-07-20	63	16–147	20.3 µg/m³	5h	1
2026-07-19	39	9–92	10.8 µg/m³	7h	1
2026-07-18	58	12–198	23.9 µg/m³	11h	1
2026-07-17	74	13–281	42.1 µg/m³	12h	1
2026-07-16	40	10–161	13.0 µg/m³	11h	1
2026-07-15	45	8–159	12.8 µg/m³	19h	1
2026-07-14	43	43–43	10.3 µg/m³	1h	1

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