What is the air quality trend in Yellowknife?

Over the past 7 days, Yellowknife had an average AQI of 51 based on station measurements. The worst day was 2026-07-16 with AQI 71.

How is Yellowknife air quality measured?

Air quality in Yellowknife 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 Yellowknife, Canada

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

Historical PM2.5 and AQI trend from monitoring stations near Yellowknife, Canada.

Current AQI
Moderate CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

104h

PM2.5 Station

104h · 2 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-21	62	13–123	19.7 µg/m³	11h	2
2026-07-20	32	6–55	7.8 µg/m³	17h	2
2026-07-19	50	13–155	14.5 µg/m³	20h	2
2026-07-18	38	1–65	9.7 µg/m³	14h	2
2026-07-17	53	18–294	23.0 µg/m³	18h	2
2026-07-16	71	11–252	36.7 µg/m³	10h	2
2026-07-15	57	32–161	16.9 µg/m³	14h	2

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