SmogRank / Portugal / Azores / Rabo de Peixe

Rabo de Peixe, month by month

Rabo de Peixe has a measured daily mean on 105 days since 26 May 2025.

Every month since 2025

2026too few days for a mean (a year needs 200)63 days measured
JannoneFebnoneMar21 daysApr11 daysMay5 daysJun3 daysJulnoneAug12 daysSep6 daysOct5 days
2025too few days for a mean (a year needs 256)42 days measured
JanFebMarAprMay4 daysJun4 daysJul11 daysAug15 daysSepnoneOct6 daysNovnoneDec2 days
Each square is a month's mean PM2.5 in US AQI from Rabo de Peixe'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 Rabo de Peixe 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

18 months
MonthWhy
Oct 20265 of 12 days measured; a month needs 9. The others: 1 with no readings from the monitor, 5 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 20266 of 30 days measured; a month needs 21. The others: 24 with readings for part of the day (a day needs 18 hours).
Aug 202612 of 31 days measured; a month needs 22. The others: 19 with readings for part of the day (a day needs 18 hours).
Jul 2026No day measured. The others: 31 with readings for part of the day (a day needs 18 hours).
Jun 20263 of 30 days measured; a month needs 21. The others: 27 with readings for part of the day (a day needs 18 hours).
May 20265 of 31 days measured; a month needs 22. The others: 26 with readings for part of the day (a day needs 18 hours).
Apr 202611 of 30 days measured; a month needs 21. The others: 19 with readings for part of the day (a day needs 18 hours).
Mar 202621 of 31 days measured; a month needs 22. The others: 1 with no readings from the monitor, 9 with readings for part of the day (a day needs 18 hours).
Feb 2026No day measured. The others: 20 with no readings from the monitor, 8 with readings for part of the day (a day needs 18 hours).
Jan 2026No day measured. The others: 19 with no readings from the monitor, 12 with readings for part of the day (a day needs 18 hours).
Dec 20252 of 31 days measured; a month needs 22. The others: 29 with readings for part of the day (a day needs 18 hours).
Nov 2025No day measured. The others: 1 with no readings from the monitor, 29 with readings for part of the day (a day needs 18 hours).
Oct 20256 of 31 days measured; a month needs 22. The others: 25 with readings for part of the day (a day needs 18 hours).
Sep 2025No day measured. The others: 30 with readings for part of the day (a day needs 18 hours).
Aug 202515 of 31 days measured; a month needs 22. The others: 16 with readings for part of the day (a day needs 18 hours).
Jul 202511 of 31 days measured; a month needs 22. The others: 20 with readings for part of the day (a day needs 18 hours).
Jun 20254 of 30 days measured; a month needs 21. The others: 26 with readings for part of the day (a day needs 18 hours).
May 20254 of 31 days measured; a month needs 22. The others: 2 with readings for part of the day (a day needs 18 hours).

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

Rabo de Peixe's worst days

DayUS AQI
28 Aug 2025 6818.4 µg/m³
25 Aug 2025 6114.5 µg/m³
19 Mar 2026 5410.9 µg/m³
20 Mar 2026 529.5 µg/m³
22 Mar 2026 498.9 µg/m³
14 Aug 2026 478.5 µg/m³
21 Mar 2026 468.2 µg/m³
27 Aug 2025 458.1 µg/m³
3 Mar 2026 458.1 µg/m³
22 Aug 2026 447.9 µg/m³

Daily means, the highest since 26 May 2025; 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, Rabo de Peixe, Portugal, 26 May 2025 – 11 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/pt/rabo-de-peixe/history (accessed 13 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.

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

Updated 2026-10-13 01:07 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).