SmogRank / United States / Indiana / Michigan City
Michigan City, month by month
Michigan City has a measured daily mean on 892 days since 15 April 2024. Its worst month was July 2026, at 71 US AQI (19.6 µg/m³), 349th of 2,784 cities on that month's world ranking. Its cleanest was May 2026, at 30 US AQI (5.4 µg/m³). 2025 averaged 50 US AQI (9.0 µg/m³), against 41 US AQI (7.3 µg/m³) in 2024.
Every month since 2024
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 |
|---|---|
| Apr 2024 | 16 of 30 days measured; a month needs 21. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Michigan City's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| July 2026 | 7119.6 µg/m³ | 349thof 2,784 | Northern United States and Canada, July 2026 |
| June 2025 | 6315.8 µg/m³ | 380thof 2,508 | Northern United States and Canada, June 2025 Northern United States and Canada, May and June 2025 |
| July 2025 | 6014.1 µg/m³ | 491stof 2,889 | North-eastern United States and Canada, 29 July to 9 August 2025 Northern United States and Canada, July 2025 |
| August 2025 | 5913.4 µg/m³ | 508thof 2,901 | North-eastern United States and Canada, 29 July to 9 August 2025 |
| August 2026 | 5410.9 µg/m³ | 718thof 2,896 | – |
| February 2026 | 529.8 µg/m³ | 1,455thof 2,866 | – |
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.
Michigan City's worst days
| Day | US AQI | Episode |
|---|---|---|
| 17 Jul 2026 | 225150.0 µg/m³ | Northern United States and Canada, July 2026 |
| 19 Jul 2026 | 15560.7 µg/m³ | Northern United States and Canada, July 2026 |
| 31 Jul 2025 | 15256.9 µg/m³ | North-eastern United States and Canada, 29 July to 9 August 2025 |
| 5 Jun 2025 | 14553.4 µg/m³ | Northern United States and Canada, May and June 2025 |
| 20 Jul 2026 | 13047.2 µg/m³ | Northern United States and Canada, July 2026 |
| 15 Mar 2025 | 12645.8 µg/m³ | Eastern United States, March 2025 |
| 1 Aug 2025 | 12545.3 µg/m³ | North-eastern United States and Canada, 29 July to 9 August 2025 |
| 4 Jun 2025 | 10236.1 µg/m³ | Northern United States and Canada, May and June 2025 |
| 14 Jul 2025 | 9734.0 µg/m³ | Northern United States and Canada, July 2025 |
| 18 Jul 2026 | 9733.7 µg/m³ | Northern United States and Canada, July 2026 |
Daily means, the highest since 15 Apr 2024; 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, Michigan City, United States, 15 Apr 2024 – 11 Oct 2026. Monitor data from AirNow, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/us/michigan-city/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.
Michigan City 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).