SmogRank / Iceland / Capital Region / Garðabær

Garðabær, month by month

Garðabær has a measured daily mean on 1,009 days since 18 November 2023. Its worst month was January 2024, at 21 US AQI (3.8 µg/m³), 2,268th of 2,385 cities on that month's world ranking. Its cleanest was August 2026, at 9 US AQI (1.6 µg/m³). 2025 averaged 14 US AQI (2.6 µg/m³), against 15 US AQI (2.7 µg/m³) in 2024.

Every month since 2023

202613 so far278 days measured2,791st of 2,791 in the world
Jan13#2,605Feb9#2,864Mar13#2,957Apr21#2,765May16#2,823Jun14#2,460Jul15#2,770Aug9#2,893Sep9#2,975Oct11#2,715
202514 for the year359 days measured2,678th of 2,681 in the world
Jan13#2,461Feb16#2,612Mar20#2,723Apr21#2,834May17#2,743Jun16#2,490Jul13#2,878Aug14#2,896Sep11#3,097Oct10#2,611Nov10#2,712Dec13#2,979
202415 for the year329 days measured2,095th of 2,097 in the world
Jan21#2,268Feb13#2,462Mar13#1,673Apr17#2,430May13#2,640Jun17 daysJul16#2,539Aug11#2,009Sep15#1,998Oct11#2,014Nov18#2,541Dec16#2,566
2023too few days for a mean (a year needs 256)43 days measured
JanFebMarAprMayJunJulAugSepOctNov13 daysDec13#2,229
Each square is a month's mean PM2.5 in US AQI from Garðabær'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 Garðabær 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

2 months
MonthWhy
Jun 202417 of 30 days measured; a month needs 21. The others: 13 with under 18 hours of readings or readings that failed our checks.
Nov 202313 of 30 days measured; a month needs 21.

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

Garðabær's worst months

MonthUS AQIDays measuredWorld rank
January 2024 213.8 µg/m³23 of 312,268thof 2,385
April 2026 213.8 µg/m³30 of 302,765thof 2,941
April 2025 213.7 µg/m³30 of 302,834thof 2,951
March 2025 203.6 µg/m³31 of 312,723rdof 2,862
November 2024 183.3 µg/m³30 of 302,541stof 2,624
May 2025 173.1 µg/m³31 of 312,743rdof 2,826

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.

Garðabær's worst days

DayUS AQI
1 Jan 2024 9029.8 µg/m³
1 Jan 2026 8226.0 µg/m³
19 Apr 2026 7320.9 µg/m³
1 Jan 2025 6717.8 µg/m³
23 Aug 2025 5913.6 µg/m³
16 May 2026 5913.4 µg/m³
16 Jun 2026 5913.4 µg/m³
24 Jul 2026 5511.4 µg/m³
31 Dec 2025 5410.6 µg/m³
13 Nov 2024 529.6 µg/m³

Daily means, the highest since 18 Nov 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, Garðabær, Iceland, 18 Nov 2023 – 11 Oct 2026. Monitor data from EEA and Umhverfisstofnun, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/is/gardabaer/history (accessed 12 Oct 2026). Contains readings from Umhverfisstofnun (Environment Agency of Iceland), no reuse terms published.

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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.

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

Updated 2026-10-12 20:07 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).