SmogRank / North Macedonia / Ilinden / Ilinden
Ilinden, month by month
Ilinden has a measured daily mean on 772 days since 11 January 2023. Its worst month was December 2025, at 132 US AQI (48.0 µg/m³), 212th of 3,006 cities on that month's world ranking. Its cleanest was May 2024, at 37 US AQI (6.7 µg/m³).
Every month since 2023
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
21 months
| Month | Why |
|---|---|
| Sep 2025 | 12 of 30 days measured; a month needs 21. The others: 18 with under 18 hours of readings or readings that failed our checks. |
| Aug 2025 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Jul 2025 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Jun 2025 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| May 2025 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Apr 2025 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| Mar 2025 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Feb 2025 | No day measured. The others: 28 with under 18 hours of readings or readings that failed our checks. |
| Jan 2025 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Dec 2024 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Nov 2024 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| Oct 2024 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Sep 2024 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| Aug 2024 | 15 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks. |
| Mar 2024 | 15 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks. |
| Sep 2023 | 18 of 30 days measured; a month needs 21. The others: 12 with under 18 hours of readings or readings that failed our checks. |
| Jun 2023 | 4 of 30 days measured; a month needs 21. The others: 26 with under 18 hours of readings or readings that failed our checks. |
| May 2023 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Apr 2023 | 3 of 30 days measured; a month needs 21. The others: 27 with under 18 hours of readings or readings that failed our checks. |
| Mar 2023 | 19 of 31 days measured; a month needs 22. The others: 1 missing from OpenAQ's archive, 11 with under 18 hours of readings or readings that failed our checks. |
| Jan 2023 | 7 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.
Ilinden's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| December 2025 | 13248.0 µg/m³ | 212thof 3,006 | North Macedonia, Bulgaria and 2 more countries, December 2025 Eastern Europe, 16 to 21 December 2025and 1 more |
| December 2023 | 12545.1 µg/m³ | 34thof 2,247 | – |
| January 2026 | 11541.1 µg/m³ | 78thof 2,617 | Europe, January and February 2026 |
| January 2024 | 10436.7 µg/m³ | 78thof 2,385 | Europe, 8 to 27 January 2024 |
| February 2023 | 9633.0 µg/m³ | 20thof 1,129 | Europe, 6 to 25 February 2023 |
| February 2024 | 8828.7 µg/m³ | 114thof 2,486 | South-eastern Europe, February 2024 |
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.
Ilinden's worst days
| Day | US AQI | Episode |
|---|---|---|
| 24 Aug 2023 | 191112.0 µg/m³ | – |
| 10 Feb 2024 | 191112.0 µg/m³ | – |
| 11 Dec 2025 | 18197.8 µg/m³ | Southern Europe, December 2025 |
| 18 Dec 2025 | 18096.9 µg/m³ | Eastern Europe, 16 to 21 December 2025 |
| 17 Dec 2025 | 17996.0 µg/m³ | Eastern Europe, 16 to 21 December 2025 |
| 19 Dec 2025 | 17893.9 µg/m³ | Eastern Europe, 16 to 21 December 2025 |
| 22 Jan 2024 | 17589.9 µg/m³ | Europe, 8 to 27 January 2024 |
| 23 Dec 2025 | 17184.0 µg/m³ | North Macedonia, Bulgaria and 2 more countries, December 2025 |
| 16 Dec 2025 | 17082.5 µg/m³ | Eastern Europe, 16 to 21 December 2025 |
| 6 Jan 2024 | 16981.7 µg/m³ | – |
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, Ilinden, North Macedonia, 11 Jan 2023 – 11 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/mk/ilinden/history (accessed 12 Oct 2026).
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.
Ilinden 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).