SmogRank / Montenegro / Bar / Bar

Bar, month by month

Bar has a measured daily mean on 456 days since 1 January 2023. Its worst month was August 2026, at 52 US AQI (9.8 µg/m³), 938th of 2,896 cities on that month's world ranking. Its cleanest was May 2026, at 23 US AQI (4.2 µg/m³).

Every month since 2023

202636 so far266 days measured2,378th of 2,791 in the world
Jan41#1,675Feb29#2,575Mar43#2,221Apr27#2,552May23#2,599Jun32#1,981Jul34#2,374Aug52#938Sep48#867Oct27#2,226
2025too few days for a mean (a year needs 256)99 days measured
JannoneFebnoneMarnoneAprnoneMaynoneJunnoneJulnoneAugnoneSep34#2,012Oct25#2,250Nov24#2,531Dec44#1,872
2024too few days for a mean (a year needs 257)71 days measured
Jan45#1,207Feb51#774Mar16 daysAprnoneMaynoneJunnoneJulnoneAugnoneSepnoneOctnoneNovnoneDecnone
2023too few days for a mean (a year needs 256)20 days measured
Jan10 daysFebnoneMarnoneAprnoneMaynoneJunnoneJul3 daysAug4 daysSep3 daysOctnoneNovnoneDecnone
Each square is a month's mean PM2.5 in US AQI from Bar's measured days, with its place on that month's world ranking under it. A month has a mean once 70% of its days are measured, the rule the monthly rankings use; under that, the square gives the days measured. Each square opens that month's ranking with Bar marked; each year, the year's. A dashed square is the running month, so far.
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

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

30 months
MonthWhy
Aug 2025No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jul 2025No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jun 2025No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
May 2025No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Apr 2025No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Mar 2025No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Feb 2025No day measured. The others: 28 with under 18 hours of readings or readings that failed our checks.
Jan 2025No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Dec 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Nov 2024No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Oct 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Sep 2024No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Aug 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jul 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jun 2024No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
May 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Apr 2024No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Mar 202416 of 31 days measured; a month needs 22. The others: 15 with under 18 hours of readings or readings that failed our checks.
Dec 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Nov 2023No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Oct 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Sep 20233 of 30 days measured; a month needs 21. The others: 27 with under 18 hours of readings or readings that failed our checks.
Aug 20234 of 31 days measured; a month needs 22. The others: 27 with under 18 hours of readings or readings that failed our checks.
Jul 20233 of 31 days measured; a month needs 22. The others: 1 missing from OpenAQ's archive, 27 with under 18 hours of readings or readings that failed our checks.
Jun 2023No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
May 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Apr 2023No day measured. The others: 3 missing from OpenAQ's archive, 27 with under 18 hours of readings or readings that failed our checks.
Mar 2023No day measured. The others: 20 missing from OpenAQ's archive, 11 with under 18 hours of readings or readings that failed our checks.
Feb 2023No day measured. The others: 25 missing from OpenAQ's archive, 3 with under 18 hours of readings or readings that failed our checks.
Jan 202310 of 31 days measured; a month needs 22. The others: 6 missing from OpenAQ's archive, 15 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.

Bar's worst months

MonthUS AQIDays measuredWorld rankEpisode
August 2026 529.8 µg/m³27 of 31938thof 2,896–
February 2024 519.3 µg/m³28 of 29774thof 2,486–
September 2026 488.6 µg/m³27 of 30867thof 2,981Montenegro, North Macedonia and 2 more countries, September 2026
January 2024 458.1 µg/m³27 of 311,207thof 2,385–
December 2025 447.9 µg/m³27 of 311,872ndof 3,006–
March 2026 437.7 µg/m³31 of 312,221stof 2,971–

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.

Bar's worst days

DayUS AQIEpisode
9 Sept 2026 8326.2 µg/m³Montenegro, North Macedonia and 2 more countries, September 2026
6 Jan 2023 7823.6 µg/m³–
13 Jan 2026 7622.7 µg/m³–
4 Jan 2023 7421.6 µg/m³–
8 Sept 2026 7421.5 µg/m³–
14 Jan 2026 7421.4 µg/m³–
22 Dec 2025 6918.5 µg/m³–
16 Dec 2025 6818.2 µg/m³–
5 Feb 2024 6516.5 µg/m³–
6 Feb 2024 6516.4 µg/m³–

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, Bar, Montenegro, 1 Jan 2023 – 11 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/me/bar/history (accessed 12 Oct 2026).

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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.

Bar now: the last 24 hours, its ranks today and the last 12 months day by day.

Updated 2026-10-12 17:07 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).