SmogRank / Finland / North Savo / Kuopio

Kuopio, month by month

Kuopio has a measured daily mean on 791 days since 11 January 2023. Its worst month was July 2025, at 46 US AQI (8.3 µg/m³), 1,704th of 2,889 cities on that month's world ranking. Its cleanest was December 2025, at 13 US AQI (2.4 µg/m³).

Every month since 2023

202628 so far248 days measured2,642nd of 2,798 in the world
Jan19 daysFeb41#2,138Mar39#2,362Apr46#1,480May22#2,666Jun23#2,271Jul20#2,726Aug21#2,861Sep14#2,971Oct16#2,710
202526 for the year270 days measured2,574th of 2,681 in the world
Jan22#2,372Feb11 daysMar18 daysApr36#2,156May23#2,569Jun17 daysJul46#1,704Aug17#2,878Sep23#2,893Oct21 daysNov20 daysDec13#2,979
2024too few days for a mean (a year needs 257)217 days measured
Jan3 daysFeb33#1,839Mar15 daysApr31#1,799May33#2,012Jun29#2,195Jul31#2,131Aug14 daysSepnoneOct6 daysNov17 daysDec18 days
2023too few days for a mean (a year needs 256)56 days measured
Jan7 daysFeb33#1,021Mar20 daysApr3 daysMaynoneJunnoneJul1 dayAugnoneSepnoneOctnoneNovnoneDecnone
Each square is a month's mean PM2.5 in US AQI from Kuopio'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 Kuopio marked; each year, the year's. A dashed square is the running month, so far.
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

24 months
MonthWhy
Jan 202619 of 31 days measured; a month needs 22. The others: 12 with under 18 hours of readings or readings that failed our checks.
Nov 202520 of 30 days measured; a month needs 21. The others: 10 with under 18 hours of readings or readings that failed our checks.
Oct 202521 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks.
Jun 202517 of 30 days measured; a month needs 21. The others: 13 with under 18 hours of readings or readings that failed our checks.
Mar 202518 of 31 days measured; a month needs 22. The others: 13 with under 18 hours of readings or readings that failed our checks.
Feb 202511 of 28 days measured; a month needs 20. The others: 17 with under 18 hours of readings or readings that failed our checks.
Dec 202418 of 31 days measured; a month needs 22. The others: 13 with under 18 hours of readings or readings that failed our checks.
Nov 202417 of 30 days measured; a month needs 21. The others: 13 with under 18 hours of readings or readings that failed our checks.
Oct 20246 of 31 days measured; a month needs 22. The others: 25 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 202414 of 31 days measured; a month needs 22. The others: 17 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.
Jan 20243 of 31 days measured; a month needs 22. The others: 28 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 2023No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Aug 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jul 20231 of 31 days measured; a month needs 22. The others: 30 with under 18 hours of readings or readings that failed our checks.
Jun 2023No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
May 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Apr 20233 of 30 days measured; a month needs 21. The others: 27 with under 18 hours of readings or readings that failed our checks.
Mar 202320 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks.
Jan 20237 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.

Kuopio's worst months

MonthUS AQIDays measuredWorld rank
July 2025 468.3 µg/m³29 of 311,704thof 2,889
April 2026 468.3 µg/m³29 of 301,480thof 2,941
February 2026 417.4 µg/m³24 of 282,138thof 2,866
March 2026 397.0 µg/m³31 of 312,362ndof 2,971
April 2025 366.5 µg/m³25 of 302,156thof 2,951
February 2024 336.0 µg/m³29 of 291,839thof 2,486

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.

Kuopio's worst days

DayUS AQI
11 Apr 2026 9432.2 µg/m³
22 Feb 2023 8929.7 µg/m³
10 Apr 2026 8527.1 µg/m³
13 Apr 2026 7723.0 µg/m³
16 Apr 2025 7722.8 µg/m³
24 Mar 2025 7622.4 µg/m³
24 Feb 2026 7522.2 µg/m³
13 Feb 2026 7521.8 µg/m³
23 Mar 2025 7421.6 µg/m³
11 Mar 2026 7321.1 µg/m³

Daily means, the highest since 11 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, Kuopio, Finland, 11 Jan 2023 – 12 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/fi/kuopio/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.

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

Updated 2026-10-13 00:07 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).