SmogRank / Serbia / Central Serbia / Valjevo

Valjevo, month by month

Valjevo has a measured daily mean on 465 days since 31 March 2023. Its worst month was February 2025, at 164 US AQI (74.0 µg/m³), 13th of 2,633 cities on that month's world ranking. Its cleanest was September 2025, at 58 US AQI (13.0 µg/m³).

Every month since 2023

2026too few days for a mean (a year needs 199)0 days measured
JannoneFebnoneMarnoneAprnoneMaynoneJunnoneJulnoneAugnoneSepnoneOctnone
2025too few days for a mean (a year needs 256)175 days measured
Jan16 daysFeb164#13Mar108#177Apr19 daysMay19 daysJun63#422JulnoneAug6 daysSep58#403Oct3 daysNov9 daysDec1 day
2024too few days for a mean (a year needs 257)237 days measured
JannoneFeb13 daysMar12 daysApr69#276May59#355Jun62#201Jul58#298Aug1 daySep16 daysOct97#26Nov157#17Dec154#20
2023too few days for a mean (a year needs 256)53 days measured
JanFebMar1 dayApr20 daysMay13 daysJun11 daysJul2 daysAug2 daysSep4 daysOctnoneNovnoneDecnone
Each square is a month's mean PM2.5 in US AQI from Valjevo'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 Valjevo marked; each year, the year's.
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

33 months
MonthWhy
Oct 2026No day measured.
Sep 2026No day measured.
Aug 2026No day measured.
Jul 2026No day measured.
Jun 2026No day measured.
May 2026No day measured.
Apr 2026No day measured.
Mar 2026No day measured.
Feb 2026No day measured.
Jan 2026No day measured.
Dec 20251 of 31 days measured; a month needs 22. The others: 30 with under 18 hours of readings or readings that failed our checks.
Nov 20259 of 30 days measured; a month needs 21. The others: 21 with under 18 hours of readings or readings that failed our checks.
Oct 20253 of 31 days measured; a month needs 22. The others: 28 with under 18 hours of readings or readings that failed our checks.
Aug 20256 of 31 days measured; a month needs 22. The others: 25 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.
May 202519 of 31 days measured; a month needs 22. The others: 12 with under 18 hours of readings or readings that failed our checks.
Apr 202519 of 30 days measured; a month needs 21. The others: 11 with under 18 hours of readings or readings that failed our checks.
Jan 202516 of 31 days measured; a month needs 22. The others: 15 with under 18 hours of readings or readings that failed our checks.
Sep 202416 of 30 days measured; a month needs 21. The others: 14 with under 18 hours of readings or readings that failed our checks.
Aug 20241 of 31 days measured; a month needs 22. The others: 30 with under 18 hours of readings or readings that failed our checks.
Mar 202412 of 31 days measured; a month needs 22. The others: 19 with under 18 hours of readings or readings that failed our checks.
Feb 202413 of 29 days measured; a month needs 21. The others: 1 missing from OpenAQ's archive, 15 with under 18 hours of readings or readings that failed our checks.
Jan 2024No day measured. The others: 31 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 20234 of 30 days measured; a month needs 21. The others: 26 with under 18 hours of readings or readings that failed our checks.
Aug 20232 of 31 days measured; a month needs 22. The others: 29 with under 18 hours of readings or readings that failed our checks.
Jul 20232 of 31 days measured; a month needs 22. The others: 1 missing from OpenAQ's archive, 28 with under 18 hours of readings or readings that failed our checks.
Jun 202311 of 30 days measured; a month needs 21. The others: 19 with under 18 hours of readings or readings that failed our checks.
May 202313 of 31 days measured; a month needs 22. The others: 18 with under 18 hours of readings or readings that failed our checks.
Apr 202320 of 30 days measured; a month needs 21. The others: 3 missing from OpenAQ's archive, 7 with under 18 hours of readings or readings that failed our checks.
Mar 20231 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.

Valjevo's worst months

MonthUS AQIDays measuredWorld rankEpisode
February 2025 16474.0 µg/m³24 of 2813thof 2,633Europe, 1 to 14 February 2025
November 2024 15763.8 µg/m³30 of 3017thof 2,624Southern Europe, November 2024
Europe, November 2024
December 2024 15459.8 µg/m³24 of 3120thof 2,616–
March 2025 10838.5 µg/m³29 of 31177thof 2,862–
October 2024 9733.9 µg/m³27 of 3126thof 2,020–
April 2024 6918.5 µg/m³28 of 30276thof 2,520–

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.

Valjevo's worst days

DayUS AQIEpisode
5 Jan 2025 221146.0 µg/m³–
11 Feb 2025 214139.0 µg/m³Europe, 1 to 14 February 2025
19 Nov 2024 208133.0 µg/m³Southern Europe, November 2024
13 Feb 2025 198122.0 µg/m³Europe, 1 to 14 February 2025
18 Nov 2024 195118.0 µg/m³Southern Europe, November 2024
28 Nov 2024 190111.0 µg/m³–
22 Dec 2024 187107.0 µg/m³–
6 Jan 2025 186105.0 µg/m³–
25 Nov 2024 18198.2 µg/m³–
10 Feb 2025 18197.9 µg/m³Europe, 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, Valjevo, Serbia, 31 Mar 2023 – 11 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/rs/valjevo/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.

Valjevo 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).