SmogRank / Poland / Subcarpathia / Krosno

Krosno, month by month

Krosno has a measured daily mean on 878 days since 1 January 2023. Its worst month was January 2024, at 81 US AQI (25.3 µg/m³), 172nd of 2,385 cities on that month's world ranking. Its cleanest was August 2025, at 31 US AQI (5.6 µg/m³). 2025 averaged 53 US AQI (10.0 µg/m³), against 53 US AQI (10.4 µg/m³) in 2024.

Every month since 2023

2026too few days for a mean (a year needs 199)151 days measured
Jan6 daysFeb16 daysMar12 daysApr12 daysMaynoneJun11 daysJul43#1,939Aug46#1,481Sep44#1,020Oct5 days
202553 for the year256 days measured967th of 2,681 in the world
Jan58#636Feb76#390Mar57#1,156Apr55#849May38#1,641Jun47#1,740Jul2 daysAug31#2,595Sep19 daysOct18 daysNov18 daysDec16 days
202453 for the year331 days measured520th of 2,097 in the world
Jan81#172Feb52#710Mar21 daysApr49#1,195May34#1,978Jun32#2,080Jul43#1,459Aug45#1,194Sep48#679Oct52#588Nov62#404Dec55#720
2023too few days for a mean (a year needs 256)140 days measured
Jan59#302Feb76#79Mar66#56Apr58#215May17 daysJun11 daysJul2 daysAug2 daysSep2 daysOctnoneNovnoneDecnone
Each square is a month's mean PM2.5 in US AQI from Krosno'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 Krosno 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

21 months
MonthWhy
Oct 20265 of 11 days measured; a month needs 8. The others: 2 with no readings from the monitor, 4 with readings for part of the day (a day needs 18 hours).
Jun 202611 of 30 days measured; a month needs 21. The others: 19 with under 18 hours of readings or readings that failed our checks.
May 2026No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Apr 202612 of 30 days measured; a month needs 21. The others: 18 with under 18 hours of readings or readings that failed our checks.
Mar 202612 of 31 days measured; a month needs 22. The others: 19 with under 18 hours of readings or readings that failed our checks.
Feb 202616 of 28 days measured; a month needs 20. The others: 12 with under 18 hours of readings or readings that failed our checks.
Jan 20266 of 31 days measured; a month needs 22. The others: 25 with under 18 hours of readings or readings that failed our checks.
Dec 202516 of 31 days measured; a month needs 22. The others: 15 with under 18 hours of readings or readings that failed our checks.
Nov 202518 of 30 days measured; a month needs 21. The others: 12 with under 18 hours of readings or readings that failed our checks.
Oct 202518 of 31 days measured; a month needs 22. The others: 13 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.
Jul 20252 of 31 days measured; a month needs 22. The others: 29 with under 18 hours of readings or readings that failed our checks.
Mar 202421 of 31 days measured; a month needs 22. The others: 10 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 20232 of 30 days measured; a month needs 21. The others: 28 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: 29 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 202317 of 31 days measured; a month needs 22. The others: 14 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.

Krosno's worst months

MonthUS AQIDays measuredWorld rankEpisode
January 2024 8125.3 µg/m³22 of 31172ndof 2,385Europe, 8 to 27 January 2024
February 2023 7622.5 µg/m³28 of 2879thof 1,129Europe, 28 February to 4 March 2023
Europe, 6 to 25 February 2023
February 2025 7622.4 µg/m³21 of 28390thof 2,633Europe, 14 February to 1 March 2025
Europe, 1 to 14 February 2025
March 2023 6616.9 µg/m³29 of 3156thof 911Europe, 17 to 22 March 2023
Europe, 28 February to 4 March 2023
November 2024 6215.1 µg/m³30 of 30404thof 2,624Eastern Europe, 30 November to 8 December 2024
Europe, November 2024and 1 more
January 2023 5913.2 µg/m³28 of 31302ndof 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.

Krosno's worst days

DayUS AQIEpisode
10 Jan 2024 226151.0 µg/m³Europe, 8 to 27 January 2024
11 Jan 2024 206131.0 µg/m³Europe, 8 to 27 January 2024
9 Feb 2023 16879.5 µg/m³Europe, 6 to 25 February 2023
9 Jan 2024 16372.1 µg/m³Europe, 8 to 27 January 2024
23 Jan 2026 15358.3 µg/m³Europe, January and February 2026
7 Feb 2023 15358.0 µg/m³Europe, 6 to 25 February 2023
2 Mar 2023 14955.1 µg/m³Europe, 28 February to 4 March 2023
1 Mar 2023 14051.2 µg/m³Europe, 28 February to 4 March 2023
8 Feb 2023 13951.1 µg/m³Europe, 6 to 25 February 2023
18 Feb 2025 13348.6 µg/m³Europe, 14 February to 1 March 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, Krosno, Poland, 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/pl/krosno/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.

Krosno 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).