SmogRank / Bosnia and Herzegovina / Srpska / Banja Luka
Banja Luka, month by month
Banja Luka has a measured daily mean on 1,207 days since 1 January 2023. Its worst month was December 2023, at 175 US AQI (89.1 µg/m³), 12th of 2,247 cities on that month's world ranking. Its cleanest was May 2026, at 51 US AQI (9.1 µg/m³). 2025 averaged 96 US AQI (33.3 µg/m³), against 104 US AQI (36.8 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
2 months
| Month | Why |
|---|---|
| Aug 2025 | 8 of 31 days measured; a month needs 22. The others: 23 with under 18 hours of readings or readings that failed our checks. |
| Mar 2025 | 20 of 31 days measured; a month needs 22. The others: 11 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.
Banja Luka's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| December 2023 | 17589.1 µg/m³ | 12thof 2,247 | South-eastern Europe, 28 December 2023 to 1 January 2024 Eastern Europe, December 2023and 3 more |
| December 2025 | 17487.9 µg/m³ | 70thof 3,006 | Eastern Europe, 16 to 21 December 2025 Southern Europe, December 2025 |
| February 2025 | 16879.9 µg/m³ | 9thof 2,633 | Europe, 14 February to 1 March 2025 Europe, 1 to 14 February 2025 |
| December 2024 | 16879.7 µg/m³ | 14thof 2,616 | Europe, 24 December 2024 to 3 January 2025 Eastern Europe, 30 November to 8 December 2024 |
| November 2024 | 16879.5 µg/m³ | 9thof 2,624 | Eastern Europe, 30 November to 8 December 2024 Eastern Europe, 25 to 29 November 2024and 3 more |
| January 2024 | 16778.1 µg/m³ | 11thof 2,385 | Europe, 27 January to 2 February 2024 Europe, 8 to 27 January 2024and 2 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.
Banja Luka's worst days
| Day | US AQI | Episode |
|---|---|---|
| 18 Dec 2025 | 445298.0 µg/m³ | Eastern Europe, 16 to 21 December 2025 |
| 19 Nov 2024 | 316233.0 µg/m³ | Southern Europe, November 2024 |
| 30 Dec 2024 | 306228.0 µg/m³ | Europe, 24 December 2024 to 3 January 2025 |
| 24 Jan 2026 | 302226.0 µg/m³ | Europe, January and February 2026 |
| 31 Dec 2024 | 284209.0 µg/m³ | Europe, 24 December 2024 to 3 January 2025 |
| 19 Dec 2025 | 283208.0 µg/m³ | Eastern Europe, 16 to 21 December 2025 |
| 19 Dec 2023 | 265190.0 µg/m³ | Eastern Europe, December 2023 |
| 18 Dec 2023 | 264189.0 µg/m³ | Eastern Europe, December 2023 |
| 5 Jan 2025 | 259184.0 µg/m³ | – |
| 6 Jan 2024 | 257182.0 µg/m³ | Eastern Europe, January 2024 |
Daily means, the highest since 1 Jan 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, Banja Luka, Bosnia and Herzegovina, 1 Jan 2023 – 12 Oct 2026. Monitor data from AirNow and EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/ba/banja-luka/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.
Banja Luka now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-13 00:07 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).