SmogRank / Czechia / Zlín / Valašské Meziříčí

Valašské Meziříčí, month by month

Valašské Meziříčí has a measured daily mean on 632 days since 1 January 2023. Its worst month was December 2024, at 78 US AQI (23.7 µg/m³), 161st of 2,616 cities on that month's world ranking. Its cleanest was May 2024, at 52 US AQI (9.4 µg/m³).

Every month since 2023

2026too few days for a mean (a year needs 199)25 days measured
Jan8 daysFeb2 daysMarnoneApr1 dayMay5 daysJun3 daysJulnoneAugnoneSep1 dayOct5 days
2025too few days for a mean (a year needs 256)70 days measured
Jan13 daysFeb16 daysMar7 daysApr10 daysMay7 daysJun1 dayJulnoneAug3 daysSep7 daysOct5 daysNov1 dayDecnone
2024too few days for a mean (a year needs 257)213 days measured
Jan76#216Feb60#386Mar15 daysApr55#793May52#877JunnoneJul55#489Aug1 daySepnoneOct5 daysNov70#247Dec78#161
202361 for the year324 days measured134th of 1,355 in the world
Jan64#222Feb73#113Mar68#42Apr65#146May57#260Jun56#566Jul53#645Aug20 daysSep56#347Oct53#326Nov56#293Dec75#123
Each square is a month's mean PM2.5 in US AQI from Valašské Meziříčí'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 Valašské Meziříčí 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

28 months
MonthWhy
Oct 20265 of 11 days measured; a month needs 8. The others: 6 with readings for part of the day (a day needs 18 hours).
Sep 20261 of 30 days measured; a month needs 21. The others: 29 with readings for part of the day (a day needs 18 hours).
Aug 2026No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jul 2026No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jun 20263 of 30 days measured; a month needs 21. The others: 27 with under 18 hours of readings or readings that failed our checks.
May 20265 of 31 days measured; a month needs 22. The others: 26 with under 18 hours of readings or readings that failed our checks.
Apr 20261 of 30 days measured; a month needs 21. The others: 29 with under 18 hours of readings or readings that failed our checks.
Mar 2026No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Feb 20262 of 28 days measured; a month needs 20. The others: 26 with under 18 hours of readings or readings that failed our checks.
Jan 20268 of 31 days measured; a month needs 22. The others: 23 with under 18 hours of readings or readings that failed our checks.
Dec 2025No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Nov 20251 of 30 days measured; a month needs 21. The others: 29 with under 18 hours of readings or readings that failed our checks.
Oct 20255 of 31 days measured; a month needs 22. The others: 26 with under 18 hours of readings or readings that failed our checks.
Sep 20257 of 30 days measured; a month needs 21. The others: 23 with under 18 hours of readings or readings that failed our checks.
Aug 20253 of 31 days measured; a month needs 22. The others: 28 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 20251 of 30 days measured; a month needs 21. The others: 29 with under 18 hours of readings or readings that failed our checks.
May 20257 of 31 days measured; a month needs 22. The others: 24 with under 18 hours of readings or readings that failed our checks.
Apr 202510 of 30 days measured; a month needs 21. The others: 20 with under 18 hours of readings or readings that failed our checks.
Mar 20257 of 31 days measured; a month needs 22. The others: 24 with under 18 hours of readings or readings that failed our checks.
Feb 202516 of 28 days measured; a month needs 20. The others: 12 with under 18 hours of readings or readings that failed our checks.
Jan 202513 of 31 days measured; a month needs 22. The others: 18 with under 18 hours of readings or readings that failed our checks.
Oct 20245 of 31 days measured; a month needs 22. The others: 26 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 20241 of 31 days measured; a month needs 22. The others: 30 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.
Mar 202415 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks.
Aug 202320 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.

Valašské Meziříčí's worst months

MonthUS AQIDays measuredWorld rankEpisode
December 2024 7823.7 µg/m³24 of 31161stof 2,616Europe, 24 December 2024 to 3 January 2025
January 2024 7622.6 µg/m³28 of 31216thof 2,385Europe, 27 January to 2 February 2024
Europe, 8 to 27 January 2024and 1 more
December 2023 7522.1 µg/m³26 of 31123rdof 2,247Eastern Europe, December 2023
Czechia, Slovakia and 2 more countries, December 2023and 2 more
February 2023 7320.9 µg/m³28 of 28113thof 1,129Europe, 28 February to 4 March 2023
Europe, 6 to 25 February 2023
November 2024 7019.1 µg/m³27 of 30247thof 2,624Europe, November 2024
Eastern Europe, October and November 2024
March 2023 6818.2 µg/m³30 of 3142ndof 911Europe, 28 February to 4 March 2023

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.

Valašské Meziříčí's worst days

DayUS AQIEpisode
24 Jan 2026 257182.0 µg/m³Europe, January and February 2026
23 Jan 2026 17792.2 µg/m³Europe, January and February 2026
25 Jan 2026 17690.5 µg/m³Europe, January and February 2026
28 Dec 2024 17488.9 µg/m³Europe, 24 December 2024 to 3 January 2025
4 Feb 2026 16677.0 µg/m³Europe, January and February 2026
7 Dec 2023 16575.8 µg/m³Europe, December 2023
10 Jan 2024 16473.7 µg/m³Europe, 8 to 27 January 2024
9 Jan 2024 16372.4 µg/m³Europe, 8 to 27 January 2024
27 Dec 2024 16270.6 µg/m³Europe, 24 December 2024 to 3 January 2025
2 Mar 2023 15967.6 µg/m³Europe, 28 February to 4 March 2023

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, Valašské Meziříčí, Czechia, 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/cz/valasske-mezirici/history (accessed 12 Oct 2026).

Download chart (PNG)

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.

Valašské Meziříčí 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).