SmogRank / Norway / Nordland / Mo i Rana

Mo i Rana, month by month

Mo i Rana has a measured daily mean on 962 days since 1 January 2023. Its worst month was March 2024, at 55 US AQI (11.1 µg/m³), 292nd of 1,698 cities on that month's world ranking. Its cleanest was May 2026, at 19 US AQI (3.4 µg/m³). 2025 averaged 29 US AQI (5.3 µg/m³), against 37 US AQI (6.6 µg/m³) in 2024.

Every month since 2023

2026too few days for a mean (a year needs 200)163 days measured
Jan54#995Feb53#1,311Mar27#2,689Apr31#2,368May19#2,760Jun27#2,196Jul2 daysAug1 daySepnoneOctnone
202529 for the year301 days measured2,488th of 2,681 in the world
Jan45#1,379Feb45#1,556Mar30#2,406Apr26#2,650May19#2,692Jun22#2,399Jul32#2,378Aug23#2,798Sep27#2,690Oct9 daysNovnoneDec19 days
202437 for the year345 days measured1,626th of 2,097 in the world
Jan53#859Feb54#566Mar55#292Apr42#1,359May33#2,043Jun24#2,326Jul19#2,491Aug32#1,783Sep25#1,862Oct22#1,934Nov34#1,975Dec37#1,845
2023too few days for a mean (a year needs 256)153 days measured
Jan34#954Feb37#968Mar43#518Apr41#988May17 daysJun11 daysJul5 daysAug4 daysSep4 daysOctnoneNovnoneDecnone
Each square is a month's mean PM2.5 in US AQI from Mo i Rana'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 Mo i Rana marked; each year, the year's.
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

15 months
MonthWhy
Oct 2026No day measured. The others: 2 with no readings from the monitor, 10 with readings for part of the day (a day needs 18 hours).
Sep 2026No day measured. The others: 29 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.
Aug 20261 of 31 days measured; a month needs 22. The others: 30 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 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.

Mo i Rana's worst months

MonthUS AQIDays measuredWorld rank
March 2024 5511.1 µg/m³25 of 31292ndof 1,698
February 2024 5410.9 µg/m³27 of 29566thof 2,486
January 2026 5410.9 µg/m³28 of 31995thof 2,617
February 2026 5310.4 µg/m³25 of 281,311thof 2,866
January 2024 5310.2 µg/m³28 of 31859thof 2,385
January 2025 458.1 µg/m³31 of 311,379thof 2,474

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.

Mo i Rana's worst days

DayUS AQI
14 Feb 2024 9130.6 µg/m³
12 Mar 2024 8828.7 µg/m³
12 Feb 2024 8628.1 µg/m³
19 Jan 2024 8426.6 µg/m³
20 Jan 2025 8426.6 µg/m³
4 Mar 2024 8024.8 µg/m³
6 Mar 2024 8024.8 µg/m³
5 Mar 2023 7823.4 µg/m³
24 Jan 2026 7723.0 µg/m³
13 Mar 2024 7622.7 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, Mo i Rana, Norway, 1 Jan 2023 – 20 Aug 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/no/mo-i-rana/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.

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

Updated 2026-10-13 04:07 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).