SmogRank / Slovakia / Nitra Region / Šahy
Šahy, month by month
Šahy has a measured daily mean on 877 days since 29 January 2024. Its worst month was February 2025, at 138 US AQI (50.6 µg/m³), 40th of 2,852 cities on that month's world ranking. Its cleanest was September 2026, at 37 US AQI (6.6 µg/m³).
Every month since 2024
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
6 months
| Month | Why |
|---|---|
| Oct 2024 | 13 of 31 days measured; a month needs 22. The others: 18 with readings for part of the day (a day needs 18 hours). |
| Sep 2024 | No day measured. The others: 30 with readings for part of the day (a day needs 18 hours). |
| Aug 2024 | 15 of 31 days measured; a month needs 22. The others: 6 with no readings from the monitor, 10 with readings for part of the day (a day needs 18 hours). |
| Apr 2024 | 20 of 30 days measured; a month needs 21. The others: 10 with readings for part of the day (a day needs 18 hours). |
| Mar 2024 | 12 of 31 days measured; a month needs 22. The others: 10 with no readings from the monitor, 9 with readings for part of the day (a day needs 18 hours). |
| Jan 2024 | 3 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.
Šahy's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| February 2025 | 13850.6 µg/m³ | 40thof 2,852 | Europe, 14 February to 1 March 2025 Europe, 1 to 14 February 2025 |
| January 2026 | 13649.7 µg/m³ | 50thof 2,978 | – |
| December 2024 | 11641.6 µg/m³ | 38thof 2,616 | Europe, 24 December 2024 to 3 January 2025 |
| January 2025 | 10336.4 µg/m³ | 84thof 2,754 | Europe, 24 December 2024 to 3 January 2025 |
| November 2024 | 9934.6 µg/m³ | 55thof 2,624 | Europe, November 2024 Eastern Europe, October and November 2024 |
| February 2024 | 8929.7 µg/m³ | 107thof 2,486 | – |
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.
Šahy's worst days
| Day | US AQI | Episode |
|---|---|---|
| 2 Jan 2026 | 186104.9 µg/m³ | – |
| 21 Jan 2026 | 183101.7 µg/m³ | – |
| 29 Dec 2024 | 182100.0 µg/m³ | Europe, 24 December 2024 to 3 January 2025 |
| 28 Dec 2024 | 17387.2 µg/m³ | Europe, 24 December 2024 to 3 January 2025 |
| 20 Jan 2026 | 16778.6 µg/m³ | – |
| 27 Dec 2024 | 16778.1 µg/m³ | Europe, 24 December 2024 to 3 January 2025 |
| 6 Feb 2025 | 16576.0 µg/m³ | Europe, 1 to 14 February 2025 |
| 19 Jan 2026 | 16575.8 µg/m³ | – |
| 17 Jan 2025 | 16575.5 µg/m³ | – |
| 30 Dec 2024 | 16372.3 µg/m³ | Europe, 24 December 2024 to 3 January 2025 |
Daily means, the highest since 29 Jan 2024; 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, Šahy, Slovakia, 29 Jan 2024 – 13 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/sk/sahy/history (accessed 14 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.
Šahy now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-14 03:07 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).