SmogRank / United States / Alaska / Palmer

Palmer, month by month

Palmer has a measured daily mean on 645 days since 1 January 2023. Its worst month was January 2023, at 53 US AQI (10.0 µg/m³), 482nd of 1,261 cities on that month's world ranking. Its cleanest was April 2026, at 8 US AQI (1.4 µg/m³).

Every month since 2023

202622 so far271 days measured2,751st of 2,798 in the world
Jan42#1,644Feb34#2,410Mar32#2,563Apr8#2,938May12#2,862Jun17#2,412Jul15#2,770Aug19#2,869Sep18#2,905Oct17#2,702
2025too few days for a mean (a year needs 256)88 days measured
JannoneFebnoneMarnoneAprnoneMaynoneJunnoneJulnoneAugnoneSep19 daysOct15#2,589Nov12 daysDec38#2,179
2024too few days for a mean (a year needs 257)0 days measured
JannoneFebnoneMarnoneAprnoneMaynoneJunnoneJulnoneAugnoneSepnoneOctnoneNovnoneDecnone
202325 for the year286 days measured1,295th of 1,355 in the world
Jan53#482Feb1 dayMar10 daysApr13#1,604May17#1,579Jun14#1,584Jul14#1,408Aug17#1,970Sep14#2,164Oct37#1,264Nov38#1,467Dec43#1,346
Each square is a month's mean PM2.5 in US AQI from Palmer'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 Palmer 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
Nov 202512 of 30 days measured; a month needs 21. The others: 8 with no readings from the monitor, 7 with readings for part of the day (a day needs 18 hours), 3 with under 18 hours of readings or readings that failed our checks.
Sep 202519 of 30 days measured; a month needs 21. The others: 1 with readings for part of the day (a day needs 18 hours), 10 with under 18 hours of readings or readings that failed our checks.
Aug 2025No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jul 2025No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jun 2025No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
May 2025No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Apr 2025No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Mar 2025No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Feb 2025No day measured. The others: 28 with under 18 hours of readings or readings that failed our checks.
Jan 2025No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
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.
Mar 202310 of 31 days measured; a month needs 22. The others: 1 with readings for part of the day (a day needs 18 hours), 20 missing from OpenAQ's archive.
Feb 20231 of 28 days measured; a month needs 20. The others: 2 with readings for part of the day (a day needs 18 hours), 25 missing from OpenAQ's archive.

A day counts once 18 hours of it are measured; a month needs 70% of its days.

Palmer's worst months

MonthUS AQIDays measuredWorld rank
January 2023 5310.0 µg/m³23 of 31482ndof 1,261
December 2023 437.7 µg/m³26 of 311,346thof 2,247
January 2026 427.5 µg/m³31 of 311,644thof 2,617
November 2023 386.9 µg/m³27 of 301,467thof 2,243
December 2025 386.9 µg/m³30 of 312,179thof 3,006
October 2023 376.6 µg/m³30 of 311,264thof 2,012

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.

Palmer's worst days

DayUS AQI
7 Jan 2023 10235.8 µg/m³
18 Nov 2023 8226.0 µg/m³
8 Jan 2023 7622.7 µg/m³
23 Jan 2026 7421.4 µg/m³
19 Nov 2023 7320.7 µg/m³
3 Jan 2026 7220.3 µg/m³
6 Jan 2023 7119.6 µg/m³
28 Feb 2026 7019.3 µg/m³
25 Nov 2025 6918.5 µg/m³
18 Jan 2023 6818.0 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, Palmer, 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/palmer-alaska/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.

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

Updated 2026-10-13 01:07 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).