SmogRank / Canada / Manitoba / Winnipeg
Winnipeg, month by month
Winnipeg has a measured daily mean on 359 days since 2 August 2025. Its worst month was August 2025, at 74 US AQI (21.3 µg/m³), 181st of 2,901 cities on that month's world ranking. Its cleanest was September 2026, at 17 US AQI (3.1 µg/m³).
Every month since 2025
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
3 months
| Month | Why |
|---|---|
| May 2026 | 19 of 31 days measured; a month needs 22. The others: 12 with under 18 hours of readings or readings that failed our checks. |
| Jan 2026 | 21 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks. |
| Sep 2025 | 18 of 30 days measured; a month needs 21. The others: 12 with under 18 hours of readings or readings that failed our checks. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Winnipeg's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| August 2025 | 7421.3 µg/m³ | 181stof 2,901 | Northern United States and Canada, August 2025 North-eastern United States and Canada, 29 July to 9 August 2025 |
| July 2026 | 7019.2 µg/m³ | 365thof 2,784 | Northern United States and Canada, July 2026 |
| August 2026 | 488.7 µg/m³ | 1,296thof 2,896 | – |
| February 2026 | 386.9 µg/m³ | 2,253rdof 2,866 | – |
| March 2026 | 234.2 µg/m³ | 2,779thof 2,971 | – |
| June 2026 | 224.0 µg/m³ | 2,300thof 2,497 | – |
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.
Winnipeg's worst days
| Day | US AQI | Episode |
|---|---|---|
| 7 Aug 2025 | 18197.7 µg/m³ | North-eastern United States and Canada, 29 July to 9 August 2025 |
| 8 Aug 2025 | 17691.0 µg/m³ | North-eastern United States and Canada, 29 July to 9 August 2025 |
| 16 Jul 2026 | 17082.1 µg/m³ | Northern United States and Canada, July 2026 |
| 11 Aug 2025 | 16473.6 µg/m³ | Northern United States and Canada, August 2025 |
| 2 Aug 2025 | 14754.3 µg/m³ | North-eastern United States and Canada, 29 July to 9 August 2025 |
| 3 Aug 2025 | 12946.8 µg/m³ | North-eastern United States and Canada, 29 July to 9 August 2025 |
| 23 Jul 2026 | 10838.3 µg/m³ | – |
| 14 Feb 2026 | 10537.1 µg/m³ | – |
| 4 Aug 2025 | 10436.9 µg/m³ | North-eastern United States and Canada, 29 July to 9 August 2025 |
| 5 Aug 2025 | 9935.0 µg/m³ | North-eastern United States and Canada, 29 July to 9 August 2025 |
Daily means, the highest since 2 Aug 2025; 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, Winnipeg, Canada, 2 Aug 2025 – 11 Oct 2026. Monitor data from AirGradient via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/ca/winnipeg/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.
Winnipeg now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 22:07 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).