SmogRank / United States / Wisconsin / La Crosse

La Crosse, month by month

La Crosse has a measured daily mean on 346 days since 1 January 2023. Its worst month was June 2023, at 81 US AQI (25.2 µg/m³), 175th of 1,603 cities on that month's world ranking. Its cleanest was October 2023, at 27 US AQI (4.8 µg/m³).

Every month since 2023

2026too few days for a mean (a year needs 199)0 days measured
JannoneFebnoneMarnoneAprnoneMaynoneJunnoneJulnoneAugnoneSepnoneOctnone
2025too few days for a mean (a year needs 256)0 days measured
JannoneFebnoneMarnoneAprnoneMaynoneJunnoneJulnoneAugnoneSepnoneOctnoneNovnoneDecnone
2024too few days for a mean (a year needs 257)0 days measured
JannoneFebnoneMarnoneAprnoneMaynoneJunnoneJulnoneAugnoneSepnoneOctnoneNovnoneDecnone
202352 for the year346 days measured520th of 1,355 in the world
Jan62#244Feb44#822Mar42#542Apr41#957May49#720Jun81#175Jul53#663Aug54#534Sep41#1,385Oct27#1,806Nov34#1,690Dec18 days
Each square is a month's mean PM2.5 in US AQI from La Crosse'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 La Crosse 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

35 months
MonthWhy
Oct 2026No day measured.
Sep 2026No day measured.
Aug 2026No day measured.
Jul 2026No day measured.
Jun 2026No day measured.
May 2026No day measured.
Apr 2026No day measured.
Mar 2026No day measured.
Feb 2026No day measured.
Jan 2026No day measured.
Dec 2025No day measured.
Nov 2025No day measured.
Oct 2025No day measured.
Sep 2025No day measured.
Aug 2025No day measured.
Jul 2025No day measured.
Jun 2025No day measured.
May 2025No day measured.
Apr 2025No day measured.
Mar 2025No day measured.
Feb 2025No day measured.
Jan 2025No day measured.
Dec 2024No day measured.
Nov 2024No day measured.
Oct 2024No day measured.
Sep 2024No day measured.
Aug 2024No day measured.
Jul 2024No day measured.
Jun 2024No day measured.
May 2024No day measured.
Apr 2024No day measured.
Mar 2024No day measured.
Feb 2024No day measured.
Jan 2024No day measured.
Dec 202318 of 31 days measured; a month needs 22. The others: 13 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.

La Crosse's worst months

MonthUS AQIDays measuredWorld rankEpisode
June 2023 8125.2 µg/m³29 of 30175thof 1,603Eastern United States and Canada, June and July 2023
United States and Canada, June 2023and 1 more
January 2023 6215.0 µg/m³26 of 31244thof 1,261–
August 2023 5410.5 µg/m³31 of 31534thof 1,980–
July 2023 5310.0 µg/m³31 of 31663rdof 1,432United States and Canada, July 2023
Eastern United States and Canada, June and July 2023
May 2023 498.8 µg/m³31 of 31720thof 1,600Eastern United States and Canada, May and June 2023
February 2023 448.0 µg/m³28 of 28822ndof 1,129–

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.

La Crosse's worst days

DayUS AQIEpisode
28 Jun 2023 17995.1 µg/m³Eastern United States and Canada, June and July 2023
27 Jun 2023 16980.9 µg/m³Eastern United States and Canada, June and July 2023
29 Jun 2023 15763.5 µg/m³Eastern United States and Canada, June and July 2023
5 Jun 2023 15358.9 µg/m³Eastern United States and Canada, May and June 2023
6 Jun 2023 12244.1 µg/m³Eastern United States and Canada, May and June 2023
15 Jun 2023 9935.1 µg/m³United States and Canada, June 2023
15 Jul 2023 9834.4 µg/m³United States and Canada, July 2023
16 Jul 2023 9633.0 µg/m³United States and Canada, July 2023
11 Jan 2023 9532.6 µg/m³–
7 Jan 2023 8929.3 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, La Crosse, United States, 1 Jan 2023 – 11 Oct 2026. Monitor data from AirNow, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/us/la-crosse/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.

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

Updated 2026-10-12 17:07 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).