SmogRank / Japan / Tottori / Kurayoshi
Kurayoshi, month by month
Kurayoshi has a measured daily mean on 826 days since 2 December 2023. Its worst month was July 2026, at 58 US AQI (13.1 µg/m³), 712th of 2,784 cities on that month's world ranking. Its cleanest was December 2024, at 30 US AQI (5.4 µg/m³).
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
7 months
| Month | Why |
|---|---|
| Sep 2026 | 8 of 30 days measured; a month needs 21. The others: 15 with no readings from the monitor, 6 with readings for part of the day (a day needs 18 hours), 1 with under 18 hours of readings or readings that failed our checks. |
| Nov 2024 | 4 of 30 days measured; a month needs 21. The others: 26 with under 18 hours of readings or readings that failed our checks. |
| Oct 2024 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Sep 2024 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| Aug 2024 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Jul 2024 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Jun 2024 | No day measured. The others: 30 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.
Kurayoshi's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| July 2026 | 5813.1 µg/m³ | 712thof 2,784 | – |
| July 2025 | 5812.9 µg/m³ | 662ndof 2,889 | Japan and South Korea, June and July 2025 |
| April 2024 | 5812.7 µg/m³ | 635thof 2,520 | Japan and South Korea, April 2024 |
| April 2025 | 5712.4 µg/m³ | 716thof 2,951 | Japan and South Korea, April 2025 |
| June 2025 | 5712.2 µg/m³ | 774thof 2,508 | Japan and South Korea, June and July 2025 |
| May 2025 | 5712.1 µg/m³ | 576thof 2,826 | Japan, May 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.
Kurayoshi's worst days
| Day | US AQI | Episode |
|---|---|---|
| 18 Apr 2024 | 10035.3 µg/m³ | Japan and South Korea, April 2024 |
| 4 Jul 2025 | 9733.9 µg/m³ | Japan and South Korea, June and July 2025 |
| 25 Mar 2025 | 9633.4 µg/m³ | Japan and South Korea, March 2025 |
| 2 Jul 2025 | 9532.5 µg/m³ | Japan and South Korea, June and July 2025 |
| 26 Mar 2025 | 9331.9 µg/m³ | Japan and South Korea, March 2025 |
| 19 May 2025 | 9331.4 µg/m³ | – |
| 25 Apr 2025 | 9130.8 µg/m³ | Japan and South Korea, April 2025 |
| 31 Jan 2025 | 9030.3 µg/m³ | Japan and South Korea, 31 January to 1 February 2025 |
| 28 Mar 2026 | 8728.6 µg/m³ | Japan and South Korea, March 2026 |
| 24 Mar 2026 | 8628.0 µg/m³ | Japan and South Korea, March 2026 |
Daily means, the highest since 2 Dec 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, Kurayoshi, Japan, 2 Dec 2023 – 12 Oct 2026. Monitor data from Ministry of the Environment Air Pollutant Wide Area Monitoring System via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/jp/kurayoshi/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.
Kurayoshi 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).