SmogRank / Czechia / Hradec Králové Region / Hradec Králové

Hradec Králové, month by month

Hradec Králové has a measured daily mean on 760 days since 1 January 2023. Its worst month was January 2024, at 70 US AQI (19.4 µg/m³), 294th of 2,385 cities on that month's world ranking. Its cleanest was November 2023, at 44 US AQI (8.0 µg/m³).

Every month since 2023

2026too few days for a mean (a year needs 200)54 days measured
Jan8 daysFeb5 daysMar8 daysApr7 daysMay14 daysJun5 daysJulnoneAugnoneSep1 dayOct6 days
2025too few days for a mean (a year needs 256)156 days measured
Jan13 daysFeb18 daysMar9 daysApr10 daysMay11 daysJun3 daysJul9 daysAug21 daysSep19 daysOct10 daysNov14 daysDec19 days
2024too few days for a mean (a year needs 257)216 days measured
Jan70#294Feb58#427Mar15 daysApr51#1,132May51#906JunnoneJul52#832Aug1 daySepnoneOct8 daysNov70#247Dec60#528
202358 for the year334 days measured184th of 1,355 in the world
Jan59#296Feb67#206Mar60#106Apr58#211May55#303Jun56#556Jul53#619Aug54#474Sep57#293Oct58#161Nov44#1,143Dec63#272
Each square is a month's mean PM2.5 in US AQI from Hradec Králové'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 Hradec Králové marked; each year, the year's.
Good0–50
Moderate51–100
Unhealthy for 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

27 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 202614 of 31 days measured; a month needs 22. The others: 17 with under 18 hours of readings or readings that failed our checks.
Apr 20267 of 30 days measured; a month needs 21. The others: 23 with under 18 hours of readings or readings that failed our checks.
Mar 20268 of 31 days measured; a month needs 22. The others: 23 with under 18 hours of readings or readings that failed our checks.
Feb 20265 of 28 days measured; a month needs 20. The others: 23 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 202519 of 31 days measured; a month needs 22. The others: 12 with under 18 hours of readings or readings that failed our checks.
Nov 202514 of 30 days measured; a month needs 21. The others: 16 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 202519 of 30 days measured; a month needs 21. The others: 11 with under 18 hours of readings or readings that failed our checks.
Aug 202521 of 31 days measured; a month needs 22. The others: 10 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 202518 of 28 days measured; a month needs 20. The others: 10 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 20248 of 31 days measured; a month needs 22. The others: 23 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.

A day counts once 18 hours of it are measured; a month needs 70% of its days.

Hradec Králové's worst months

MonthUS AQIDays measuredWorld rankEpisode
January 2024 7019.4 µg/m³31 of 31294thof 2,385Europe, 27 January to 2 February 2024
Europe, 8 to 27 January 2024and 1 more
November 2024 7019.1 µg/m³26 of 30247thof 2,624Eastern Europe, 25 to 29 November 2024
Europe, November 2024and 1 more
February 2023 6717.7 µg/m³28 of 28206thof 1,129Europe, 28 February to 4 March 2023
Europe, 6 to 25 February 2023
December 2023 6315.4 µg/m³29 of 31272ndof 2,247Eastern Europe, December 2023
Europe, December 2023and 1 more
December 2024 6014.0 µg/m³24 of 31528thof 2,616Europe, 24 December 2024 to 3 January 2025
March 2023 6013.7 µg/m³29 of 31106thof 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.

Hradec Králové's worst days

DayUS AQIEpisode
24 Jan 2026 16677.3 µg/m³Europe, January and February 2026
11 Jan 2024 15257.2 µg/m³Europe, 8 to 27 January 2024
23 Jan 2026 14854.5 µg/m³Europe, January and February 2026
31 Mar 2024 13750.2 µg/m³Europe, March and April 2024
8 Nov 2024 13649.8 µg/m³Europe, November 2024
10 Jan 2024 13348.4 µg/m³Europe, 8 to 27 January 2024
15 Jan 2026 12645.8 µg/m³Europe, January and February 2026
20 Oct 2023 12445.0 µg/m³Czechia, Austria and 2 more countries, October 2023
7 Dec 2023 12043.3 µg/m³Europe, December 2023
31 Jan 2024 12043.2 µg/m³Europe, 27 January to 2 February 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, Hradec Králové, 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/hradec-kralove/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.

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

Updated 2026-10-13 04:07 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).