SmogRank / United States / South Dakota / Aberdeen
Aberdeen, month by month
Aberdeen, South Dakota has a measured daily mean on 1,331 days since 6 January 2023. Its worst month was September 2023, at 57 US AQI (12.4 µg/m³), 303rd of 2,176 cities on that month's world ranking. Its cleanest was June 2026, at 8 US AQI (1.5 µg/m³). 2025 averaged 35 US AQI (6.3 µg/m³), against 31 US AQI (5.6 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 |
|---|---|
| Oct 2026 | 5 of 11 days measured; a month needs 8. The others: 5 with no readings from the monitor, 1 with readings for part of the day (a day needs 18 hours). |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Aberdeen's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| September 2023 | 5712.4 µg/m³ | 303rdof 2,176 | Northern United States, September 2023 Northern United States and Canada, August and September 2023 |
| June 2023 | 5511.3 µg/m³ | 611thof 1,603 | Eastern United States and Canada, June and July 2023 United States and Canada, June 2023 |
| May 2023 | 5410.5 µg/m³ | 406thof 1,600 | Northern United States and Canada, May 2023 |
| August 2025 | 529.6 µg/m³ | 1,329thof 2,901 | Northern United States and Canada, August 2025 North-eastern United States and Canada, 29 July to 9 August 2025 |
| August 2023 | 529.4 µg/m³ | 719thof 1,980 | Northern United States and Canada, August and September 2023 Northern United States, August 2023 |
| July 2024 | 488.6 µg/m³ | 1,137thof 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.
Aberdeen's worst days
Daily means, the highest since 6 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, Aberdeen, South Dakota, United States, 6 Jan 2023 – 11 Oct 2026. Monitor data from AirNow, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/us/aberdeen/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.
Aberdeen 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).