SmogRank / Croatia / Zagreb / Zagreb
Zagreb, month by month
Zagreb has a measured daily mean on 662 days since 12 November 2024. Its worst month was December 2024, at 148 US AQI (54.5 µg/m³), 22nd of 2,616 cities on that month's world ranking. Its cleanest was July 2025, at 52 US AQI (9.5 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
3 months
| Month | Why |
|---|---|
| Feb 2025 | 17 of 28 days measured; a month needs 20. The others: 11 with under 18 hours of readings or readings that failed our checks. |
| Jan 2025 | 9 of 31 days measured; a month needs 22. The others: 22 with under 18 hours of readings or readings that failed our checks. |
| Nov 2024 | 19 of 30 days measured; a month needs 21. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Zagreb's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| December 2024 | 14854.5 µg/m³ | 22ndof 2,616 | Europe, 24 December 2024 to 3 January 2025 |
| January 2026 | 14151.6 µg/m³ | 37thof 2,617 | Europe, January and February 2026 Eastern Europe, January 2026 |
| December 2025 | 13750.0 µg/m³ | 200thof 3,006 | Eastern Europe, 16 to 21 December 2025 |
| February 2026 | 10637.6 µg/m³ | 171stof 2,866 | Europe, January and February 2026 |
| November 2025 | 9130.4 µg/m³ | 254thof 2,715 | Europe, 8 to 10 November 2025 |
| March 2025 | 8426.6 µg/m³ | 389thof 2,862 | Germany, Poland and 25 more countries, March 2025 Europe, 14 February to 1 March 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.
Zagreb's worst days
| Day | US AQI | Episode |
|---|---|---|
| 31 Dec 2024 | 264189.0 µg/m³ | Europe, 24 December 2024 to 3 January 2025 |
| 30 Dec 2024 | 235159.5 µg/m³ | Europe, 24 December 2024 to 3 January 2025 |
| 24 Jan 2026 | 206131.0 µg/m³ | Europe, January and February 2026 |
| 29 Dec 2024 | 197121.0 µg/m³ | Europe, 24 December 2024 to 3 January 2025 |
| 1 Jan 2025 | 191112.5 µg/m³ | Europe, 24 December 2024 to 3 January 2025 |
| 12 Dec 2025 | 191112.0 µg/m³ | – |
| 11 Dec 2025 | 17894.1 µg/m³ | – |
| 9 Jan 2026 | 17792.0 µg/m³ | Eastern Europe, January 2026 |
| 24 Feb 2025 | 17691.6 µg/m³ | Europe, 14 February to 1 March 2025 |
| 28 Dec 2024 | 17387.2 µg/m³ | Europe, 24 December 2024 to 3 January 2025 |
Daily means, the highest since 12 Nov 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, Zagreb, Croatia, 12 Nov 2024 – 11 Oct 2026. Monitor data from AirGradient via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/hr/zagreb/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.
Zagreb now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 19:07 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).