SmogRank / Japan / Nara / Nara-shi
Nara-shi, month by month
Nara-shi has a measured daily mean on 872 days since 28 July 2023. Its worst month was July 2025, at 59 US AQI (13.5 µg/m³), 550th of 2,889 cities on that month's world ranking. Its cleanest was September 2026, at 31 US AQI (5.5 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
9 months
| Month | Why |
|---|---|
| Jun 2025 | 4 of 30 days measured; a month needs 21. The others: 26 with under 18 hours of readings or readings that failed our checks. |
| May 2025 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Apr 2025 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| Mar 2025 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Feb 2025 | No day measured. The others: 28 with under 18 hours of readings or readings that failed our checks. |
| Jan 2025 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Dec 2024 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Nov 2024 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| Jul 2023 | 3 of 31 days measured; a month needs 22. The others: 1 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.
Nara-shi's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| July 2025 | 5913.5 µg/m³ | 550thof 2,889 | Japan and South Korea, June and July 2025 |
| August 2025 | 5712.5 µg/m³ | 676thof 2,901 | – |
| November 2023 | 5712.4 µg/m³ | 270thof 2,243 | Japan, November 2023 |
| July 2026 | 5611.6 µg/m³ | 974thof 2,784 | – |
| April 2024 | 5511.0 µg/m³ | 866thof 2,520 | Japan and South Korea, April 2024 |
| October 2023 | 5410.7 µg/m³ | 278thof 2,012 | – |
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.
Nara-shi's worst days
| Day | US AQI | Episode |
|---|---|---|
| 4 Jul 2025 | 12745.9 µg/m³ | Japan and South Korea, June and July 2025 |
| 5 Jul 2025 | 11039.2 µg/m³ | Japan and South Korea, June and July 2025 |
| 2 Jul 2025 | 10537.0 µg/m³ | Japan and South Korea, June and July 2025 |
| 3 Jul 2025 | 10336.4 µg/m³ | Japan and South Korea, June and July 2025 |
| 18 Apr 2024 | 9834.5 µg/m³ | Japan and South Korea, April 2024 |
| 9 Jul 2025 | 9532.9 µg/m³ | Japan and South Korea, June and July 2025 |
| 4 Nov 2023 | 9432.1 µg/m³ | Japan, November 2023 |
| 5 Nov 2023 | 8929.5 µg/m³ | Japan, November 2023 |
| 3 Nov 2023 | 8225.7 µg/m³ | Japan, November 2023 |
| 17 Apr 2024 | 8024.7 µg/m³ | Japan and South Korea, April 2024 |
Daily means, the highest since 28 Jul 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, Nara-shi, Japan, 28 Jul 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/nara-shi/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.
Nara-shi now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-13 05:07 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).