SmogRank / Finland / Pirkanmaa / Tampere

Tampere, month by month

Tampere has a measured daily mean on 1,234 days since 1 January 2023. Its worst month was April 2023, at 38 US AQI (6.8 µg/m³), 1,075th of 1,622 cities on that month's world ranking. Its cleanest was November 2024, at 13 US AQI (2.3 µg/m³). 2025 averaged 22 US AQI (3.9 µg/m³), against 22 US AQI (4.0 µg/m³) in 2024.

Every month since 2023

202623 so far275 days measured2,734th of 2,798 in the world
Jan30#2,271Feb28#2,588Mar28#2,666Apr26#2,592May23#2,627Jun22#2,317Jul19#2,734Aug22#2,838Sep16#2,942Oct16#2,710
202522 for the year325 days measured2,638th of 2,681 in the world
Jan18#2,430Feb27#2,394Mar27#2,508Apr21#2,814May21#2,645Jun22#2,399Jul37#2,104Aug18#2,866Sep22#2,940Oct17#2,564Nov15#2,683Dec15#2,972
202422 for the year276 days measured2,048th of 2,097 in the world
Jan24#2,208Feb23#2,288Mar15 daysApr21#2,292May31#2,156Jun26#2,297Jul23#2,429Aug15 daysSepnoneOct15 daysNov13#2,605Dec17#2,560
202323 for the year358 days measured1,319th of 1,355 in the world
Jan18#1,221Feb26#1,077Mar20#871Apr38#1,075May25#1,478Jun24#1,466Jul20#1,364Aug23#1,911Sep25#2,053Oct14#1,997Nov16#2,214Dec29#1,973
Each square is a month's mean PM2.5 in US AQI from Tampere'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 Tampere marked; each year, the year's. A dashed square is the running month, so far.
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

4 months
MonthWhy
Oct 202415 of 31 days measured; a month needs 22. The others: 16 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 202415 of 31 days measured; a month needs 22. The others: 16 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.

Tampere's worst months

MonthUS AQIDays measuredWorld rank
April 2023 386.8 µg/m³30 of 301,075thof 1,622
July 2025 376.6 µg/m³31 of 312,104thof 2,889
May 2024 315.5 µg/m³31 of 312,156thof 2,684
January 2026 305.4 µg/m³29 of 312,271stof 2,617
December 2023 295.3 µg/m³31 of 311,973rdof 2,247
February 2026 285.1 µg/m³27 of 282,588thof 2,866

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.

Tampere's worst days

DayUS AQI
1 Jan 2026 6918.8 µg/m³
22 Feb 2023 6416.3 µg/m³
23 Feb 2025 6415.9 µg/m³
7 Jan 2024 6315.4 µg/m³
31 Mar 2023 6215.0 µg/m³
11 Mar 2026 6114.5 µg/m³
24 Aug 2026 6014.1 µg/m³
22 Jun 2023 5913.4 µg/m³
11 Dec 2023 5813.1 µg/m³
10 Dec 2023 5812.9 µg/m³

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, Tampere, Finland, 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/fi/tampere/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.

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

Updated 2026-10-13 03:07 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).