SmogRank / United States / Illinois / Skokie
Skokie, month by month
Skokie has a measured daily mean on 132 days since 31 January 2026. Its worst month was February 2026, at 62 US AQI (15.0 µg/m³), 774th of 2,866 cities on that month's world ranking. Its cleanest was September 2026, at 45 US AQI (8.1 µg/m³).
Every month since 2026
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
6 months
| Month | Why |
|---|---|
| Aug 2026 | 16 of 31 days measured; a month needs 22. The others: 15 with under 18 hours of readings or readings that failed our checks. |
| Jul 2026 | 12 of 31 days measured; a month needs 22. The others: 19 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 | 11 of 31 days measured; a month needs 22. The others: 20 with under 18 hours of readings or readings that failed our checks. |
| Apr 2026 | 3 of 30 days measured; a month needs 21. The others: 27 with under 18 hours of readings or readings that failed our checks. |
| Jan 2026 | 1 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.
Skokie's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| February 2026 | 6215.0 µg/m³ | 774thof 2,866 | North-eastern United States and Canada, 14 to 19 February 2026 |
| March 2026 | 5611.6 µg/m³ | 1,296thof 2,971 | North-eastern United States and Canada, March 2026 |
| September 2026 | 458.1 µg/m³ | 971stof 2,981 | – |
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.
Skokie's worst days
| Day | US AQI | Episode |
|---|---|---|
| 16 Jul 2026 | 280205.0 µg/m³ | – |
| 15 Feb 2026 | 8829.2 µg/m³ | North-eastern United States and Canada, 14 to 19 February 2026 |
| 4 Mar 2026 | 8728.2 µg/m³ | North-eastern United States and Canada, March 2026 |
| 5 Feb 2026 | 7924.0 µg/m³ | – |
| 19 Mar 2026 | 7723.2 µg/m³ | – |
| 2 Feb 2026 | 7622.5 µg/m³ | – |
| 18 Jul 2026 | 7522.1 µg/m³ | – |
| 14 Feb 2026 | 7522.0 µg/m³ | North-eastern United States and Canada, 14 to 19 February 2026 |
| 9 Feb 2026 | 7521.9 µg/m³ | – |
| 26 Mar 2026 | 7220.5 µg/m³ | – |
Daily means, the highest since 31 Jan 2026; 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, Skokie, United States, 31 Jan 2026 – 11 Oct 2026. Monitor data from Clarity via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/us/skokie/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.
Skokie now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 23:07 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).