SmogRank / Hungary / Szabolcs-Szatmár-Bereg / Nyíregyháza
Nyíregyháza, month by month
Nyíregyháza has a measured daily mean on 962 days since 31 March 2023. Its worst month was February 2025, at 111 US AQI (39.5 µg/m³), 105th of 2,633 cities on that month's world ranking. Its cleanest was July 2026, at 37 US AQI (6.7 µg/m³). 2025 averaged 64 US AQI (16.2 µg/m³), against 64 US AQI (15.9 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
12 months
| Month | Why |
|---|---|
| Oct 2026 | No day measured. The others: 11 with no readings from the monitor. |
| Apr 2024 | 16 of 30 days measured; a month needs 21. The others: 14 with under 18 hours of readings or readings that failed our checks. |
| Mar 2024 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Feb 2024 | No day measured. The others: 1 missing from OpenAQ's archive, 28 with under 18 hours of readings or readings that failed our checks. |
| Jan 2024 | 17 of 31 days measured; a month needs 22. The others: 14 with under 18 hours of readings or readings that failed our checks. |
| Oct 2023 | 18 of 31 days measured; a month needs 22. The others: 13 with under 18 hours of readings or readings that failed our checks. |
| Aug 2023 | 9 of 31 days measured; a month needs 22. The others: 22 with under 18 hours of readings or readings that failed our checks. |
| Jul 2023 | No day measured. The others: 1 missing from OpenAQ's archive, 30 with under 18 hours of readings or readings that failed our checks. |
| Jun 2023 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| May 2023 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Apr 2023 | 5 of 30 days measured; a month needs 21. The others: 3 missing from OpenAQ's archive, 22 with under 18 hours of readings or readings that failed our checks. |
| Mar 2023 | 1 of 31 days measured; a month needs 22. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Nyíregyháza's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| February 2025 | 11139.5 µg/m³ | 105thof 2,633 | Europe, 14 February to 1 March 2025 Europe, 1 to 14 February 2025 |
| January 2026 | 9130.5 µg/m³ | 172ndof 2,617 | Europe, January and February 2026 Eastern Europe, January 2026 |
| November 2024 | 9029.8 µg/m³ | 69thof 2,624 | Eastern Europe, 30 November to 8 December 2024 Eastern Europe, 25 to 29 November 2024and 3 more |
| December 2024 | 7723.0 µg/m³ | 176thof 2,616 | Eastern Europe, 30 November to 8 December 2024 |
| December 2025 | 7722.9 µg/m³ | 407thof 3,006 | Eastern Europe, 16 to 21 December 2025 Eastern Europe, 3 to 7 December 2025 |
| March 2025 | 7722.8 µg/m³ | 473rdof 2,862 | Europe, March 2025 Germany, Poland and 25 more countries, March 2025and 1 more |
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.
Nyíregyháza's worst days
| Day | US AQI | Episode |
|---|---|---|
| 6 Sept 2026 | 16575.0 µg/m³ | – |
| 22 Jun 2024 | 16574.9 µg/m³ | – |
| 12 Feb 2025 | 15966.6 µg/m³ | Europe, 1 to 14 February 2025 |
| 9 Mar 2025 | 15866.1 µg/m³ | Germany, Poland and 25 more countries, March 2025 |
| 23 Feb 2025 | 15865.8 µg/m³ | Europe, 14 February to 1 March 2025 |
| 13 Feb 2025 | 15662.8 µg/m³ | Europe, 1 to 14 February 2025 |
| 18 Dec 2025 | 15662.5 µg/m³ | Eastern Europe, 16 to 21 December 2025 |
| 11 Jan 2024 | 15662.1 µg/m³ | Europe, 8 to 27 January 2024 |
| 7 Nov 2024 | 15459.7 µg/m³ | Europe, November 2024 |
| 10 Feb 2025 | 15459.6 µg/m³ | Europe, 1 to 14 February 2025 |
Daily means, the highest since 31 Mar 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, Nyíregyháza, Hungary, 31 Mar 2023 – 21 Sep 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/hu/nyiregyhaza/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.
Nyíregyháza now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 20:07 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).