SmogRank / Singapore / Singapore
Singapore, month by month
Singapore has a measured daily mean on 1,339 days since 11 January 2023. Its worst month was September 2026, at 111 US AQI (39.4 µg/m³), 59th of 2,997 cities on that month's world ranking. Its cleanest was February 2023, at 39 US AQI (7.1 µg/m³). 2025 averaged 57 US AQI (12.4 µg/m³), against 56 US AQI (12.0 µg/m³) in 2024.
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
1 month
| Month | Why |
|---|---|
| Jan 2023 | 21 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.
Singapore's worst months
| Month | US AQI | World rank |
|---|---|---|
| September 2026 | 11139.4 µg/m³ | 59thof 2,997 |
| August 2026 | 7823.7 µg/m³ | 182ndof 2,896 |
| October 2023 | 6919.0 µg/m³ | 74thof 2,012 |
| July 2026 | 6717.6 µg/m³ | 406thof 2,784 |
| September 2023 | 6516.7 µg/m³ | 140thof 2,176 |
| July 2024 | 6215.2 µg/m³ | 176thof 2,566 |
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.
Singapore's worst days
| Day | US AQI |
|---|---|
| 9 Oct 2026 | 192113.9 µg/m³ |
| 10 Oct 2026 | 18097.0 µg/m³ |
| 12 Oct 2026 | 17894.0 µg/m³ |
| 11 Oct 2026 | 17488.3 µg/m³ |
| 7 Oct 2026 | 17285.4 µg/m³ |
| 29 Sept 2026 | 16981.5 µg/m³ |
| 14 Sept 2026 | 16473.7 µg/m³ |
| 8 Oct 2026 | 16068.6 µg/m³ |
| 5 Oct 2026 | 15967.6 µg/m³ |
| 28 Sept 2026 | 15764.3 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, Singapore, 11 Jan 2023 – 12 Oct 2026. Monitor data from National Environment Agency, Singapore, read from the publisher; sources listed at smogrank.com/sources. smogrank.com/sg/singapore/history (accessed 13 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.
Singapore now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-13 01:07 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).