SmogRank / Spain / Aragon / Zaragoza

Zaragoza, month by month

Zaragoza, Aragon has a measured daily mean on 717 days since 11 January 2023. Its worst month was February 2023, at 61 US AQI (14.5 µg/m³), 387th of 1,129 cities on that month's world ranking. Its cleanest was May 2024, at 29 US AQI (5.2 µg/m³).

Every month since 2023

2026too few days for a mean (a year needs 199)126 days measured
Jan39#1,786Feb8 daysMarnoneAprnoneMay2 daysJun9 daysJul18 daysAug54#774Sep53#657Oct7 days
202545 for the year285 days measured1,722nd of 2,681 in the world
Jan52#1,099Feb54#1,114Mar34#2,260Apr31#2,417May20 daysJunnoneJul42#1,870Aug57#692Sep38#1,767Oct46#797Nov37#1,996Dec48#1,637
2024too few days for a mean (a year needs 257)252 days measured
Jan53#870Feb51#812Mar15 daysApr39#1,450May29#2,222Jun33#2,022Jul14 daysAug7 daysSepnoneOct15 daysNov51#1,013Dec42#1,505
2023too few days for a mean (a year needs 256)54 days measured
Jan7 daysFeb61#387Mar19 daysApr3 daysMaynoneJunnoneJul1 dayAugnoneSepnoneOctnoneNovnoneDec2 days
Each square is a month's mean PM2.5 in US AQI from Zaragoza'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 Zaragoza 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

25 months
MonthWhy
Oct 20267 of 11 days measured; a month needs 8. The others: 1 with no readings from the monitors, 3 with readings for part of the day (a day needs 18 hours).
Jul 202618 of 31 days measured; a month needs 22. The others: 13 with under 18 hours of readings or readings that failed our checks.
Jun 20269 of 30 days measured; a month needs 21. The others: 21 with under 18 hours of readings or readings that failed our checks.
May 20262 of 31 days measured; a month needs 22. The others: 29 with under 18 hours of readings or readings that failed our checks.
Apr 2026No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Mar 2026No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Feb 20268 of 28 days measured; a month needs 20. The others: 20 with under 18 hours of readings or readings that failed our checks.
Jun 2025No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
May 202520 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks.
Oct 202415 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks.
Sep 2024No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Aug 20247 of 31 days measured; a month needs 22. The others: 24 with under 18 hours of readings or readings that failed our checks.
Jul 202414 of 31 days measured; a month needs 22. The others: 17 with under 18 hours of readings or readings that failed our checks.
Mar 202415 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks.
Dec 20232 of 31 days measured; a month needs 22. The others: 29 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 2023No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Aug 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jul 20231 of 31 days measured; a month needs 22. The others: 30 with under 18 hours of readings or readings that failed our checks.
Jun 2023No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
May 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Apr 20233 of 30 days measured; a month needs 21. The others: 27 with under 18 hours of readings or readings that failed our checks.
Mar 202319 of 31 days measured; a month needs 22. The others: 1 missing from OpenAQ's archive, 11 with under 18 hours of readings or readings that failed our checks.
Jan 20237 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.

Zaragoza's worst months

MonthUS AQIDays measuredWorld rankEpisode
February 2023 6114.5 µg/m³22 of 28387thof 1,129Spain, France and Portugal, February 2023
August 2025 5712.4 µg/m³31 of 31692ndof 2,901Spain, Portugal and Andorra, August 2025
February 2025 5410.8 µg/m³21 of 281,114thof 2,633–
August 2026 5410.6 µg/m³25 of 31774thof 2,896–
January 2024 5310.1 µg/m³31 of 31870thof 2,385–
September 2026 5310.0 µg/m³28 of 30657thof 2,981–

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.

Zaragoza's worst days

DayUS AQIEpisode
20 Feb 2023 8728.4 µg/m³Spain, France and Portugal, February 2023
22 Feb 2023 8628.0 µg/m³Spain, France and Portugal, February 2023
17 Aug 2025 8627.8 µg/m³Spain, Portugal and Andorra, August 2025
17 Feb 2023 8326.5 µg/m³Spain, France and Portugal, February 2023
14 Jan 2024 7823.5 µg/m³–
21 Feb 2023 7823.4 µg/m³Spain, France and Portugal, February 2023
19 Feb 2023 7722.9 µg/m³Spain, France and Portugal, February 2023
18 Dec 2024 7522.0 µg/m³–
16 Feb 2023 7521.8 µg/m³Spain, France and Portugal, February 2023
16 Aug 2025 7521.8 µg/m³Spain, Portugal and Andorra, August 2025

Daily means, the highest since 11 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, Zaragoza, Aragon, Spain, 11 Jan 2023 – 9 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/es/zaragoza/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.

Zaragoza 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).