SmogRank / Canada / Alberta / Medicine Hat
Medicine Hat, month by month
Medicine Hat has a measured daily mean on 1,283 days since 1 January 2023. Its worst month was July 2024, at 65 US AQI (16.7 µg/m³), 141st of 2,566 cities on that month's world ranking. Its cleanest was December 2023, at 12 US AQI (2.1 µg/m³). 2025 averaged 43 US AQI (7.7 µg/m³), against 39 US AQI (7.1 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
2 months
| Month | Why |
|---|---|
| Mar 2023 | 11 of 31 days measured; a month needs 22. The others: 20 missing from OpenAQ's archive. |
| Feb 2023 | 3 of 28 days measured; a month needs 20. The others: 25 missing from OpenAQ's archive. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Medicine Hat's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| July 2024 | 6516.7 µg/m³ | 141stof 2,566 | North-western United States and Canada, July 2024 |
| June 2025 | 6215.2 µg/m³ | 426thof 2,508 | North-western Canada and United States, June 2025 |
| September 2023 | 6114.6 µg/m³ | 187thof 2,176 | Northern United States and Canada, August and September 2023 North-western Canada and United States, September 2023 |
| July 2026 | 6114.6 µg/m³ | 544thof 2,784 | North-western United States and Canada, July and August 2026 |
| July 2023 | 6114.5 µg/m³ | 165thof 1,432 | United States and Canada, July 2023 North-western Canada and United States, July 2023and 1 more |
| September 2025 | 6114.2 µg/m³ | 365thof 3,104 | North-western United States and Canada, August and September 2025 |
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.
Medicine Hat's worst days
| Day | US AQI | Episode |
|---|---|---|
| 4 Sept 2023 | 189109.0 µg/m³ | Northern United States and Canada, August and September 2023 |
| 20 May 2023 | 185104.0 µg/m³ | North-western United States and Canada, May 2023 |
| 16 Jul 2023 | 17792.0 µg/m³ | United States and Canada, July 2023 |
| 11 Jun 2025 | 17285.1 µg/m³ | North-western Canada and United States, June 2025 |
| 5 Sept 2023 | 16778.6 µg/m³ | Northern United States and Canada, August and September 2023 |
| 15 Aug 2024 | 16778.3 µg/m³ | North-western Canada and United States, August 2024 |
| 21 May 2023 | 16474.7 µg/m³ | North-western United States and Canada, May 2023 |
| 15 Jul 2023 | 16270.7 µg/m³ | United States and Canada, July 2023 |
| 10 Jun 2025 | 16069.0 µg/m³ | North-western Canada and United States, June 2025 |
| 15 Jul 2025 | 15967.6 µg/m³ | North-western Canada and United States, 14 to 17 July 2025 |
Daily means, the highest since 1 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, Medicine Hat, Canada, 1 Jan 2023 – 11 Oct 2026. Monitor data from AirNow, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/ca/medicine-hat/history (accessed 13 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.
Medicine Hat now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-13 01:07 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).