SmogRank / Norway / Vestland / Bergen

Bergen, month by month

Bergen has a measured daily mean on 980 days since 1 January 2023. Its worst month was January 2026, at 61 US AQI (14.3 µg/m³), 793rd of 2,617 cities on that month's world ranking. Its cleanest was September 2025, at 18 US AQI (3.3 µg/m³). 2025 averaged 32 US AQI (5.8 µg/m³), against 31 US AQI (5.5 µg/m³) in 2024.

Every month since 2023

2026too few days for a mean (a year needs 200)172 days measured
Jan61#793Feb52#1,559Mar52#1,799Apr21#2,780May22#2,666Jun22#2,317Jul2 daysAug1 daySepnoneOct5 days
202532 for the year301 days measured2,403rd of 2,681 in the world
Jan46#1,359Feb43#1,643Mar41#2,052Apr26#2,629May25#2,464Jun28#2,300Jul35#2,207Aug23#2,792Sep18#3,036Oct9 daysNovnoneDec19 days
202431 for the year354 days measured1,883rd of 2,097 in the world
Jan55#767Feb33#1,839Mar29#1,278Apr25#2,118May33#2,012Jun26#2,297Jul20#2,484Aug28#1,869Sep32#1,594Oct23#1,922Nov33#2,017Dec26#2,357
2023too few days for a mean (a year needs 256)153 days measured
Jan42#768Feb35#992Mar25#843Apr25#1,421May17 daysJun11 daysJul5 daysAug4 daysSep4 daysOctnoneNovnoneDecnone
Each square is a month's mean PM2.5 in US AQI from Bergen'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 Bergen 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

15 months
MonthWhy
Oct 20265 of 12 days measured; a month needs 9. The others: 6 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 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.

Bergen's worst months

MonthUS AQIDays measuredWorld rankEpisode
January 2026 6114.3 µg/m³29 of 31793rdof 2,617–
January 2024 5511.3 µg/m³28 of 31767thof 2,385Southern Norway, 5 to 10 January 2024
February 2026 529.4 µg/m³25 of 281,559thof 2,866–
March 2026 529.4 µg/m³27 of 311,799thof 2,971Europe, 1 to 12 March 2026
January 2025 468.2 µg/m³31 of 311,359thof 2,474–
February 2025 437.8 µg/m³28 of 281,643rdof 2,633–

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.

Bergen's worst days

DayUS AQIEpisode
9 Jan 2026 12043.4 µg/m³–
6 Jan 2026 11340.5 µg/m³–
4 Jan 2026 10436.7 µg/m³–
1 Jan 2023 9733.7 µg/m³–
5 Jan 2026 9532.8 µg/m³–
8 Jan 2024 9231.2 µg/m³Southern Norway, 5 to 10 January 2024
3 Feb 2026 9130.6 µg/m³–
6 Jan 2024 9130.4 µg/m³Southern Norway, 5 to 10 January 2024
20 Jan 2023 8929.7 µg/m³–
7 Jan 2024 8728.2 µg/m³Southern Norway, 5 to 10 January 2024

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, Bergen, 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/bergen/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.

Bergen 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).