SmogRank / China / Jilin / Changchun

Changchun, month by month

We don't read China's government monitoring network: it publishes only on its own website. We are building the reader for it. Changchun's figures come from community low-cost sensors, not that network. What we measure in China.

Changchun has a measured daily mean on 449 days since 16 July 2025. Its worst month was November 2025, at 188 US AQI (108.4 µg/m³), 39th of 2,715 cities on that month's world ranking. Its cleanest was September 2026, at 62 US AQI (15.1 µg/m³).

Every month since 2025

2026113 so far285 days measured72nd of 2,798 in the world
Jan138#40Feb144#94Mar186#2Apr134#77May76#244Jun81#194Jul82#204Aug72#236Sep62#367Oct99#39
2025too few days for a mean (a year needs 256)164 days measured
JanFebMarAprMayJunJul16 daysAug71#215Sep76#169Oct149#66Nov188#39Dec140#193
Each square is a month's mean PM2.5 in US AQI from Changchun's measured days, with its place on that month's world ranking under it. A month has a mean once 70% of its days are measured, the rule the monthly rankings use; under that, the square gives the days measured. Each square opens that month's ranking with Changchun marked; each year, the year's. A dashed square is the running month, so far.
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

Months without a mean, and why

1 month
MonthWhy
Jul 202516 of 31 days measured; a month needs 22.

A day counts once 18 hours of it are measured; a month needs 70% of its days.

Changchun's worst months

MonthUS AQIDays measuredWorld rank
November 2025 188108.4 µg/m³29 of 3039thof 2,715
March 2026 186105.1 µg/m³31 of 312ndof 2,971
October 2025 14955.1 µg/m³31 of 3166thof 2,614
February 2026 14452.9 µg/m³28 of 2894thof 2,866
December 2025 14051.5 µg/m³31 of 31193rdof 3,006
January 2026 13850.4 µg/m³31 of 3140thof 2,617

Monthly means over the days measured; finished months only. World rank: its place on that month's world ranking of every city with enough days. Each month opens that ranking.

Changchun's worst days

DayUS AQI
3 Apr 2026 465308.0 µg/m³
24 Nov 2025 398274.0 µg/m³
25 Nov 2025 318234.0 µg/m³
15 Mar 2026 312231.0 µg/m³
17 Mar 2026 306228.0 µg/m³
20 Mar 2026 304227.0 µg/m³
29 Oct 2025 300225.0 µg/m³
8 Nov 2025 289214.5 µg/m³
26 Nov 2025 283208.0 µg/m³
21 Mar 2026 263188.5 µg/m³

Daily means, the highest since 16 Jul 2025; the WHO's daily guideline is 15 µg/m³. Each date opens that day's world ranking, and each episode the bad-air spell it was part of.

Use this history

SmogRank, PM2.5 monthly and daily means, Changchun, China, 16 Jul 2025 – 12 Oct 2026. Monitor data from AirGradient via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/cn/changchun/history (accessed 13 Oct 2026).

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You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.

Changchun now: the last 24 hours, its ranks today and the last 12 months day by day.

Updated 2026-10-13 00:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some low-cost readings: Sensor.Community, ODbL (data and licence). Some readings: Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Vietnam's government monitors; Aurassure; Umhverfisstofnun (Environment Agency of Iceland); RMCAB (Secretaría Distrital de Ambiente, Bogotá); Love My Air (City and County of Denver), no reuse terms published (why we use them).