SmogRank / Ghana / Greater Accra / Accra
Accra, month by month
Accra has a measured daily mean on 835 days since 1 January 2023. Its worst month was January 2023, at 153 US AQI (59.0 µg/m³), 21st of 1,261 cities on that month's world ranking. Its cleanest was September 2023, at 54 US AQI (10.6 µg/m³). 2025 averaged 76 US AQI (22.6 µg/m³), against 71 US AQI (19.8 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
21 months
| Month | Why |
|---|---|
| Aug 2026 | 13 of 31 days measured; a month needs 22. The others: 18 with under 18 hours of readings or readings that failed our checks. |
| Jul 2026 | 11 of 31 days measured; a month needs 22. The others: 20 with under 18 hours of readings or readings that failed our checks. |
| Jun 2026 | 7 of 30 days measured; a month needs 21. The others: 23 with under 18 hours of readings or readings that failed our checks. |
| May 2026 | 13 of 31 days measured; a month needs 22. The others: 18 with under 18 hours of readings or readings that failed our checks. |
| Apr 2026 | 9 of 30 days measured; a month needs 21. The others: 21 with under 18 hours of readings or readings that failed our checks. |
| Jun 2025 | 19 of 30 days measured; a month needs 21. The others: 11 with under 18 hours of readings or readings that failed our checks. |
| May 2025 | 15 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks. |
| Apr 2024 | 16 of 30 days measured; a month needs 21. The others: 14 with under 18 hours of readings or readings that failed our checks. |
| Mar 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. |
| 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 | 9 of 31 days measured; a month needs 22. The others: 22 with under 18 hours of readings or readings that failed our checks. |
| Aug 2023 | 8 of 31 days measured; a month needs 22. The others: 23 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 | 10 of 30 days measured; a month needs 21. The others: 3 missing from OpenAQ's archive, 17 with under 18 hours of readings or readings that failed our checks. |
| Mar 2023 | No day measured. The others: 20 missing from OpenAQ's archive, 11 with under 18 hours of readings or readings that failed our checks. |
| Feb 2023 | 3 of 28 days measured; a month needs 20. The others: 25 missing from OpenAQ's archive. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Accra's worst months
| Month | US AQI | World rank |
|---|---|---|
| January 2023 | 15359.0 µg/m³ | 21stof 1,261 |
| December 2024 | 11942.9 µg/m³ | 33rdof 2,616 |
| January 2025 | 10738.1 µg/m³ | 58thof 2,474 |
| January 2026 | 9230.9 µg/m³ | 167thof 2,617 |
| February 2025 | 9130.4 µg/m³ | 209thof 2,633 |
| July 2025 | 8326.1 µg/m³ | 127thof 2,889 |
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.
Accra's worst days
| Day | US AQI |
|---|---|
| 1 Jan 2023 | 269194.0 µg/m³ |
| 3 Jan 2023 | 213138.0 µg/m³ |
| 2 Jan 2023 | 206131.0 µg/m³ |
| 5 Jan 2023 | 17793.0 µg/m³ |
| 6 Jan 2023 | 17082.0 µg/m³ |
| 22 Dec 2024 | 16879.3 µg/m³ |
| 4 Jan 2023 | 16778.0 µg/m³ |
| 21 Dec 2024 | 16676.6 µg/m³ |
| 9 Jan 2023 | 16372.8 µg/m³ |
| 23 Dec 2024 | 16372.5 µg/m³ |
Daily means, the highest since 1 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, Accra, Ghana, 1 Jan 2023 – 11 Oct 2026. Monitor data from AirGradient and Clarity via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/gh/accra/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.
Accra 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).