SmogRank / Czechia / South Bohemian Region / České Budějovice

České Budějovice, month by month

České Budějovice has a measured daily mean on 737 days since 1 January 2023. Its worst month was January 2024, at 76 US AQI (22.5 µg/m³), 220th of 2,385 cities on that month's world ranking. Its cleanest was May 2024, at 39 US AQI (7.1 µg/m³).

Every month since 2023

2026too few days for a mean (a year needs 200)61 days measured
Jan10 daysFeb7 daysMar6 daysApr10 daysMay16 daysJun5 daysJulnoneAugnoneSep1 dayOct6 days
2025too few days for a mean (a year needs 256)163 days measured
Jan14 daysFeb19 daysMar9 daysApr10 daysMay11 daysJun3 daysJul9 daysAug52#1,311Sep18 daysOct10 daysNov15 daysDec20 days
2024too few days for a mean (a year needs 257)212 days measured
Jan76#220Feb55#545Mar15 daysApr45#1,297May39#1,654JunnoneJul48#1,103Aug1 daySepnoneOct9 daysNov59#494Dec63#436
202355 for the year301 days measured310th of 1,355 in the world
Jan57#335Feb61#398Mar58#139Apr54#338May54#406Jun54#709Jul49#775Aug49#812Sep52#631Oct53#303Nov19 daysDec21 days
Each square is a month's mean PM2.5 in US AQI from České Budějovice'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 České Budějovice 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 20266 of 12 days measured; a month needs 9. 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 20265 of 30 days measured; a month needs 21. The others: 25 with under 18 hours of readings or readings that failed our checks.
May 202616 of 31 days measured; a month needs 22. The others: 15 with under 18 hours of readings or readings that failed our checks.
Apr 202610 of 30 days measured; a month needs 21. The others: 20 with under 18 hours of readings or readings that failed our checks.
Mar 20266 of 31 days measured; a month needs 22. The others: 25 with under 18 hours of readings or readings that failed our checks.
Feb 20267 of 28 days measured; a month needs 20. The others: 21 with under 18 hours of readings or readings that failed our checks.
Jan 202610 of 31 days measured; a month needs 22. The others: 21 with under 18 hours of readings or readings that failed our checks.
Dec 202520 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks.
Nov 202515 of 30 days measured; a month needs 21. The others: 15 with under 18 hours of readings or readings that failed our checks.
Oct 202510 of 31 days measured; a month needs 22. The others: 21 with under 18 hours of readings or readings that failed our checks.
Sep 202518 of 30 days measured; a month needs 21. The others: 12 with under 18 hours of readings or readings that failed our checks.
Jul 20259 of 31 days measured; a month needs 22. The others: 22 with under 18 hours of readings or readings that failed our checks.
Jun 20253 of 30 days measured; a month needs 21. The others: 27 with under 18 hours of readings or readings that failed our checks.
May 202511 of 31 days measured; a month needs 22. The others: 20 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 20259 of 31 days measured; a month needs 22. The others: 22 with under 18 hours of readings or readings that failed our checks.
Feb 202519 of 28 days measured; a month needs 20. The others: 9 with under 18 hours of readings or readings that failed our checks.
Jan 202514 of 31 days measured; a month needs 22. The others: 17 with under 18 hours of readings or readings that failed our checks.
Oct 20249 of 31 days measured; a month needs 22. The others: 22 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.
Dec 202321 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks.
Nov 202319 of 30 days measured; a month needs 21. 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.

České Budějovice's worst months

MonthUS AQIDays measuredWorld rankEpisode
January 2024 7622.5 µg/m³23 of 31220thof 2,385Europe, 27 January to 2 February 2024
Europe, 8 to 27 January 2024
December 2024 6315.5 µg/m³24 of 31436thof 2,616Europe, 24 December 2024 to 3 January 2025
February 2023 6114.2 µg/m³27 of 28398thof 1,129Europe, 28 February to 4 March 2023
Europe, 6 to 25 February 2023
November 2024 5913.3 µg/m³27 of 30494thof 2,624Europe, November 2024
March 2023 5812.6 µg/m³24 of 31139thof 911Europe, 28 February to 4 March 2023
January 2023 5712.1 µg/m³22 of 31335thof 1,261–

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.

České Budějovice's worst days

DayUS AQIEpisode
11 Jan 2024 16068.0 µg/m³Europe, 8 to 27 January 2024
23 Feb 2025 14553.4 µg/m³Europe, 14 February to 1 March 2025
31 Mar 2024 14453.0 µg/m³Europe, March and April 2024
10 Jan 2024 14151.8 µg/m³Europe, 8 to 27 January 2024
30 Mar 2024 13649.7 µg/m³Europe, March and April 2024
8 Nov 2024 12645.8 µg/m³Europe, November 2024
29 Dec 2024 12344.3 µg/m³Europe, 24 December 2024 to 3 January 2025
31 Dec 2024 12244.2 µg/m³Europe, 24 December 2024 to 3 January 2025
9 Jan 2024 12143.6 µg/m³Europe, 8 to 27 January 2024
28 Dec 2024 12043.1 µg/m³Europe, 24 December 2024 to 3 January 2025

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, České Budějovice, Czechia, 1 Jan 2023 – 12 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/cz/ceske-budejovice/history (accessed 13 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.

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

Updated 2026-10-13 02:07 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).