SmogRank / Norway / Innlandet / Lillehammer

Lillehammer, month by month

Lillehammer has a measured daily mean on 963 days since 1 January 2023. Its worst month was February 2026, at 66 US AQI (17.1 µg/m³), 676th of 2,866 cities on that month's world ranking. Its cleanest was May 2026, at 18 US AQI (3.2 µg/m³). 2025 averaged 41 US AQI (7.4 µg/m³), against 36 US AQI (6.4 µg/m³) in 2024.

Every month since 2023

2026too few days for a mean (a year needs 200)170 days measured
Jan62#756Feb66#676Mar51#1,860Apr38#1,950May18#2,788Jun21#2,337Jul2 daysAugnoneSepnoneOct4 days
202541 for the year301 days measured1,957th of 2,681 in the world
Jan64#433Feb58#970Mar51#1,735Apr29#2,479May18#2,727Jun20#2,444Jul34#2,236Aug21#2,831Sep25#2,806Oct9 daysNovnoneDec19 days
202436 for the year339 days measured1,671st of 2,097 in the world
Jan50#1,022Feb39#1,478Mar33#1,186Apr26#2,089May35#1,921Jun27#2,253Jul24#2,381Aug30#1,836Sep32#1,562Oct28#1,775Nov37#1,825Dec16 days
2023too few days for a mean (a year needs 256)153 days measured
Jan51#552Feb41#881Mar27#809Apr32#1,241May17 daysJun11 daysJul5 daysAug4 daysSep4 daysOctnoneNovnoneDecnone
Each square is a month's mean PM2.5 in US AQI from Lillehammer'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 Lillehammer 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

16 months
MonthWhy
Oct 20264 of 12 days measured; a month needs 9. The others: 7 with readings for part of the day (a day needs 18 hours), 1 with under 18 hours of readings or readings that failed our checks.
Sep 2026No day measured. The others: 30 with readings for part of the day (a day needs 18 hours).
Aug 2026No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jul 20262 of 31 days measured; a month needs 22. The others: 29 with under 18 hours of readings or readings that failed our checks.
Dec 202519 of 31 days measured; a month needs 22. The others: 12 with under 18 hours of readings or readings that failed our checks.
Nov 2025No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Oct 20259 of 31 days measured; a month needs 22. The others: 22 with under 18 hours of readings or readings that failed our checks.
Dec 202416 of 31 days measured; a month needs 22. The others: 15 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 20234 of 30 days measured; a month needs 21. The others: 26 with under 18 hours of readings or readings that failed our checks.
Aug 20234 of 31 days measured; a month needs 22. The others: 27 with under 18 hours of readings or readings that failed our checks.
Jul 20235 of 31 days measured; a month needs 22. The others: 26 with under 18 hours of readings or readings that failed our checks.
Jun 202311 of 30 days measured; a month needs 21. The others: 19 with under 18 hours of readings or readings that failed our checks.
May 202317 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.

Lillehammer's worst months

MonthUS AQIDays measuredWorld rankEpisode
February 2026 6617.1 µg/m³25 of 28676thof 2,866–
January 2025 6416.1 µg/m³31 of 31433rdof 2,474Southern Norway, 12 to 13 January 2025
January 2026 6215.0 µg/m³29 of 31756thof 2,617–
February 2025 5812.9 µg/m³28 of 28970thof 2,633–
January 2023 519.2 µg/m³30 of 31552ndof 1,261–
March 2025 519.2 µg/m³31 of 311,735thof 2,862–

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.

Lillehammer's worst days

DayUS AQIEpisode
21 Feb 2026 14954.9 µg/m³–
12 Jan 2026 9733.7 µg/m³–
13 Jan 2025 9231.2 µg/m³Southern Norway, 12 to 13 January 2025
20 Feb 2025 9030.1 µg/m³–
20 Jan 2025 9030.0 µg/m³–
8 Feb 2025 9029.9 µg/m³–
16 Jan 2025 8829.2 µg/m³–
15 Jan 2025 8829.0 µg/m³–
25 Dec 2024 8828.7 µg/m³–
14 Jan 2025 8728.6 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, Lillehammer, Norway, 1 Jan 2023 – 11 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/no/lillehammer/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.

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

Updated 2026-10-12 21:07 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).