SmogRank / Germany / North Rhine-Westphalia / Jüchen

Jüchen, month by month

Jüchen has a measured daily mean on 725 days since 11 January 2023. Its worst month was February 2025, at 71 US AQI (19.7 µg/m³), 592nd of 2,633 cities on that month's world ranking. Its cleanest was September 2025, at 31 US AQI (5.6 µg/m³).

Every month since 2023

202652 so far233 days measured1,078th of 2,791 in the world
Jan70#491Feb53#1,368Mar61#909Apr44#1,625May41#1,507Jun15 daysJul41#2,069Aug33#2,462Sep17 daysOct43#1,059
202552 for the year304 days measured1,147th of 2,681 in the world
Jan55#825Feb71#592Mar61#991Apr53#1,125May38#1,671Jun18 daysJul36#2,135Aug44#1,820Sep31#2,285Oct36#1,405Nov45#1,509Dec20 days
2024too few days for a mean (a year needs 257)137 days measured
JannoneFeb1 dayMarnoneAprnoneMaynoneJun48#1,082Jul38#1,765Aug15 daysSepnoneOct14 daysNov52#868Dec47#1,212
2023too few days for a mean (a year needs 256)51 days measured
Jan7 daysFeb62#361Mar20 daysApr3 daysMaynoneJunnoneJul1 dayAugnoneSepnoneOctnoneNovnoneDecnone
Each square is a month's mean PM2.5 in US AQI from Jüchen'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 Jüchen 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

23 months
MonthWhy
Sep 202617 of 30 days measured; a month needs 21. The others: 13 with readings for part of the day (a day needs 18 hours).
Jun 202615 of 30 days measured; a month needs 21. The others: 15 with under 18 hours of readings or readings that failed our checks.
Dec 202520 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks.
Jun 202518 of 30 days measured; a month needs 21. The others: 12 with under 18 hours of readings or readings that failed our checks.
Oct 202414 of 31 days measured; a month needs 22. The others: 17 with under 18 hours of readings or readings that failed our checks.
Sep 2024No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Aug 202415 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks.
May 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Apr 2024No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Mar 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Feb 20241 of 29 days measured; a month needs 21. The others: 28 with under 18 hours of readings or readings that failed our checks.
Jan 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Dec 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Nov 2023No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Oct 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Sep 2023No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Aug 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jul 20231 of 31 days measured; a month needs 22. The others: 30 with under 18 hours of readings or readings that failed our checks.
Jun 2023No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
May 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Apr 20233 of 30 days measured; a month needs 21. The others: 27 with under 18 hours of readings or readings that failed our checks.
Mar 202320 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks.
Jan 20237 of 31 days measured; a month needs 22. The others: 14 with under 18 hours of readings or readings that failed our checks.

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

Jüchen's worst months

MonthUS AQIDays measuredWorld rankEpisode
February 2025 7119.7 µg/m³23 of 28592ndof 2,633Europe, 14 February to 1 March 2025
Europe, 1 to 14 February 2025
January 2026 7019.1 µg/m³24 of 31491stof 2,617Europe, January and February 2026
February 2023 6214.8 µg/m³20 of 28361stof 1,129Europe, 28 February to 4 March 2023
Europe, 6 to 25 February 2023
March 2025 6114.5 µg/m³25 of 31991stof 2,862Germany, Poland and 25 more countries, March 2025
Europe, 14 February to 1 March 2025
March 2026 6114.3 µg/m³31 of 31909thof 2,971Europe, 18 to 25 March 2026
Europe, 1 to 12 March 2026
January 2025 5511.1 µg/m³29 of 31825thof 2,474Germany, France and 19 more countries, January 2025

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.

Jüchen's worst days

DayUS AQIEpisode
13 Feb 2025 13449.0 µg/m³Europe, 1 to 14 February 2025
26 Jan 2026 13047.2 µg/m³Europe, January and February 2026
10 Feb 2025 12445.0 µg/m³Europe, 1 to 14 February 2025
25 Jan 2026 12143.6 µg/m³Europe, January and February 2026
3 Mar 2023 11239.9 µg/m³Europe, 28 February to 4 March 2023
7 Mar 2026 10336.2 µg/m³Europe, 1 to 12 March 2026
14 Feb 2025 9733.9 µg/m³Europe, 14 February to 1 March 2025
Europe, 1 to 14 February 2025
11 Mar 2025 9733.8 µg/m³Germany, Poland and 25 more countries, March 2025
8 Mar 2026 9633.1 µg/m³Europe, 1 to 12 March 2026
24 Jan 2026 9432.4 µg/m³Europe, January and February 2026

Daily means, the highest since 11 Jan 2023; 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, Jüchen, Germany, 11 Jan 2023 – 10 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/de/juchen/history (accessed 12 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.

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

Updated 2026-10-12 19:07 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).