SmogRank / Portugal / Aveiro / Beduido

Beduido, month by month

Beduido has a measured daily mean on 259 days since 1 January 2023. Its worst month was November 2023, at 54 US AQI (10.7 µg/m³), 485th of 2,243 cities on that month's world ranking. Its cleanest was May 2023, at 27 US AQI (4.8 µg/m³).

Every month since 2023

2026too few days for a mean (a year needs 199)0 days measured
JannoneFebnoneMarnoneAprnoneMaynoneJunnoneJulnoneAugnoneSepnoneOctnone
2025too few days for a mean (a year needs 256)0 days measured
JannoneFebnoneMarnoneAprnoneMaynoneJunnoneJulnoneAugnoneSepnoneOctnoneNovnoneDecnone
2024too few days for a mean (a year needs 257)0 days measured
JannoneFebnoneMarnoneAprnoneMaynoneJunnoneJulnoneAugnoneSepnoneOctnoneNovnoneDecnone
202341 for the year259 days measured995th of 1,355 in the world
Jan8 daysFeb3 daysMar11 daysApr31#1,292May27#1,450Jun31#1,360Jul28#1,216Aug32#1,704Sep34#1,761Oct51#430Nov54#485Dec19 days
Each square is a month's mean PM2.5 in US AQI from Beduido'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 Beduido 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

38 months
MonthWhy
Oct 2026No day measured.
Sep 2026No day measured.
Aug 2026No day measured.
Jul 2026No day measured.
Jun 2026No day measured.
May 2026No day measured.
Apr 2026No day measured.
Mar 2026No day measured.
Feb 2026No day measured.
Jan 2026No day measured.
Dec 2025No day measured.
Nov 2025No day measured.
Oct 2025No day measured.
Sep 2025No day measured.
Aug 2025No day measured.
Jul 2025No day measured.
Jun 2025No day measured.
May 2025No day measured.
Apr 2025No day measured.
Mar 2025No day measured.
Feb 2025No day measured.
Jan 2025No day measured.
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.
Dec 202319 of 31 days measured; a month needs 22. The others: 11 with no readings from the monitor, 1 with readings for part of the day (a day needs 18 hours).
Mar 202311 of 31 days measured; a month needs 22. The others: 20 missing from OpenAQ's archive.
Feb 20233 of 28 days measured; a month needs 20. The others: 25 missing from OpenAQ's archive.
Jan 20238 of 31 days measured; a month needs 22. The others: 4 with no readings from the monitor, 12 with readings for part of the day (a day needs 18 hours), 7 missing from OpenAQ's archive.

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

Beduido's worst months

MonthUS AQIDays measuredWorld rank
November 2023 5410.7 µg/m³29 of 30485thof 2,243
October 2023 519.3 µg/m³23 of 31430thof 2,012
September 2023 346.1 µg/m³29 of 301,761stof 2,176
August 2023 325.7 µg/m³24 of 311,704thof 1,980
June 2023 315.6 µg/m³30 of 301,360thof 1,603
April 2023 315.5 µg/m³27 of 301,292ndof 1,622

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.

Beduido's worst days

DayUS AQI
19 Dec 2023 10738.0 µg/m³
1 Feb 2023 10637.5 µg/m³
26 Nov 2023 10135.7 µg/m³
25 Nov 2023 9331.9 µg/m³
18 Dec 2023 9029.8 µg/m³
27 Nov 2023 8728.2 µg/m³
17 Dec 2023 8426.6 µg/m³
17 Apr 2023 8125.2 µg/m³
5 May 2023 7823.5 µg/m³
14 Dec 2023 7522.2 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, Beduido, Portugal, 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/pt/beduido/history (accessed 12 Oct 2026).

Download chart (PNG)

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.

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

Updated 2026-10-12 19:07 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).