SmogRank / Armenia / Yerevan / Yerevan
Yerevan, month by month
Yerevan has a measured daily mean on 750 days since 24 January 2023. Its worst month was January 2026, at 174 US AQI (88.6 µg/m³), 14th of 2,617 cities on that month's world ranking. Its cleanest was June 2026, at 44 US AQI (7.9 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 |
|---|---|
| Jun 2025 | 13 of 30 days measured; a month needs 21. The others: 17 with under 18 hours of readings or readings that failed our checks. |
| May 2025 | 11 of 31 days measured; a month needs 22. The others: 20 with under 18 hours of readings or readings that failed our checks. |
| Jul 2024 | 13 of 31 days measured; a month needs 22. The others: 18 with under 18 hours of readings or readings that failed our checks. |
| Jun 2024 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| May 2024 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Apr 2024 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| Mar 2024 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Feb 2024 | No day measured. The others: 1 missing from OpenAQ's archive, 28 with under 18 hours of readings or readings that failed our checks. |
| Jan 2024 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Dec 2023 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Nov 2023 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| Oct 2023 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Sep 2023 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| Aug 2023 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Jul 2023 | No day measured. The others: 1 missing from OpenAQ's archive, 30 with under 18 hours of readings or readings that failed our checks. |
| Jun 2023 | No day measured. The others: 30 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 | 19 of 30 days measured; a month needs 21. The others: 3 missing from OpenAQ's archive, 8 with under 18 hours of readings or readings that failed our checks. |
| Mar 2023 | 10 of 31 days measured; a month needs 22. The others: 20 missing from OpenAQ's archive, 1 with under 18 hours of readings or readings that failed our checks. |
| Feb 2023 | 2 of 28 days measured; a month needs 20. The others: 25 missing from OpenAQ's archive, 1 with under 18 hours of readings or readings that failed our checks. |
| Jan 2023 | 4 of 31 days measured; a month needs 22. The others: 4 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.
Yerevan's worst months
| Month | US AQI | World rank |
|---|---|---|
| January 2026 | 17488.6 µg/m³ | 14thof 2,617 |
| December 2025 | 16373.1 µg/m³ | 97thof 3,006 |
| November 2025 | 15966.8 µg/m³ | 111thof 2,715 |
| December 2024 | 15764.3 µg/m³ | 19thof 2,616 |
| January 2025 | 14754.2 µg/m³ | 26thof 2,474 |
| February 2025 | 11641.4 µg/m³ | 85thof 2,633 |
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.
Yerevan's worst days
| Day | US AQI |
|---|---|
| 9 Jan 2026 | 311230.5 µg/m³ |
| 8 Jan 2026 | 263188.0 µg/m³ |
| 24 Jan 2026 | 261186.0 µg/m³ |
| 31 Jan 2026 | 261186.0 µg/m³ |
| 7 Dec 2025 | 237162.0 µg/m³ |
| 7 Jan 2026 | 236161.0 µg/m³ |
| 23 Jan 2026 | 231156.0 µg/m³ |
| 1 Feb 2026 | 229154.0 µg/m³ |
| 10 Jan 2026 | 227152.0 µg/m³ |
| 6 Dec 2025 | 209133.5 µg/m³ |
Daily means, the highest since 24 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, Yerevan, Armenia, 24 Jan 2023 – 12 Oct 2026. Monitor data from Clarity and AirGradient via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/am/yerevan/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.
Yerevan now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 20:07 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).