SmogRank / Canada / Saskatchewan / Regina
Regina, month by month
Regina has a measured daily mean on 1,191 days since 26 April 2023. Its worst month was September 2023, at 109 US AQI (38.8 µg/m³), 20th of 2,176 cities on that month's world ranking. Its cleanest was June 2024, at 21 US AQI (3.8 µg/m³). 2025 averaged 54 US AQI (10.7 µg/m³), against 52 US AQI (9.8 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
4 months
| Month | Why |
|---|---|
| Jul 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. |
| Nov 2025 | 20 of 30 days measured; a month needs 21. The others: 10 with under 18 hours of readings or readings that failed our checks. |
| Jul 2023 | 21 of 31 days measured; a month needs 22. The others: 1 missing from OpenAQ's archive, 9 with under 18 hours of readings or readings that failed our checks. |
| Apr 2023 | 5 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.
Regina's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| September 2023 | 10938.8 µg/m³ | 20thof 2,176 | Alberta, Saskatchewan and British Columbia, Canada, September 2023 Northern United States and Canada, August and September 2023and 1 more |
| July 2025 | 7924.0 µg/m³ | 148thof 2,889 | North-western Canada and United States, 19 to 22 July 2025 |
| August 2023 | 7923.9 µg/m³ | 85thof 1,980 | Northern United States and Canada, August and September 2023 North-western United States and Canada, August 2023 |
| July 2024 | 7823.5 µg/m³ | 81stof 2,566 | North-western United States and Canada, July 2024 Alberta, Saskatchewan and Manitoba, Canada, July 2024 |
| June 2025 | 7119.9 µg/m³ | 232ndof 2,508 | North-western Canada and United States, June 2025 Alberta, Saskatchewan and Manitoba, Canada, May and June 2025 |
| August 2024 | 6818.1 µg/m³ | 121stof 2,010 | Alberta, Saskatchewan and Manitoba, Canada, 22 to 23 August 2024 North-western Canada and United States, August 2024 |
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.
Regina's worst days
Daily means, the highest since 26 Apr 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, Regina, Canada, 26 Apr 2023 – 11 Oct 2026. Monitor data from AirNow, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/ca/regina/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.
Regina now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 18:07 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).