SmogRank / Austria / Styria / Knittelfeld

Knittelfeld, month by month

Knittelfeld has a measured daily mean on 255 days since 2 January 2026. Its worst month was January 2026, at 77 US AQI (22.8 µg/m³), 307th of 2,617 cities on that month's world ranking. Its cleanest was September 2026, at 43 US AQI (7.8 µg/m³).

Every month since 2026

202658 so far255 days measured681st of 2,791 in the world
Jan77#307Feb63#756Mar64#748Apr57#715May52#882Jun53#637Jul46#1,821Aug54#718Sep43#1,051Octnone
Each square is a month's mean PM2.5 in US AQI from Knittelfeld'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 Knittelfeld 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

1 month
MonthWhy
Oct 2026No day measured. The others: 10 with no readings from the monitors, 1 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.

Knittelfeld's worst months

MonthUS AQIDays measuredWorld rankEpisode
January 2026 7722.8 µg/m³28 of 31307thof 2,617Europe, January and February 2026
March 2026 6416.2 µg/m³31 of 31748thof 2,971–
February 2026 6315.4 µg/m³28 of 28756thof 2,866Europe, January and February 2026
April 2026 5712.1 µg/m³30 of 30715thof 2,941–
August 2026 5410.9 µg/m³30 of 31718thof 2,896–
June 2026 5310.2 µg/m³26 of 30637thof 2,497–

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.

Knittelfeld's worst days

DayUS AQIEpisode
23 Jan 2026 11039.0 µg/m³Europe, January and February 2026
25 Jan 2026 10737.8 µg/m³Europe, January and February 2026
24 Jan 2026 9934.9 µg/m³Europe, January and February 2026
13 Jan 2026 9633.0 µg/m³Europe, January and February 2026
22 Jan 2026 9532.6 µg/m³Europe, January and February 2026
17 Jan 2026 9331.8 µg/m³Europe, January and February 2026
16 Jan 2026 9331.5 µg/m³Europe, January and February 2026
21 Jan 2026 9231.1 µg/m³Europe, January and February 2026
5 Apr 2026 8628.1 µg/m³–
21 Feb 2026 8527.5 µg/m³–

Daily means, the highest since 2 Jan 2026; 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, Knittelfeld, Austria, 2 Jan 2026 – 24 Sep 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/at/knittelfeld/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.

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

Updated 2026-10-12 20:07 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).