SmogRank / Spain / Galicia / Cee

Cee, month by month

Cee has a measured daily mean on 651 days since 1 January 2023. Its worst month was February 2024, at 56 US AQI (11.8 µg/m³), 492nd of 2,486 cities on that month's world ranking. Its cleanest was July 2023, at 41 US AQI (7.4 µg/m³).

Every month since 2023

2026too few days for a mean (a year needs 199)31 days measured
Jan10 daysFeb4 daysMarnoneAprnoneMay2 daysJun3 daysJul4 daysAugnoneSep5 daysOct3 days
2025too few days for a mean (a year needs 256)105 days measured
Jan17 daysFeb1 dayMar13 daysApr18 daysMay7 daysJun1 dayJul5 daysAug17 daysSep19 daysOct3 daysNov1 dayDec3 days
2024too few days for a mean (a year needs 257)250 days measured
Jan55#762Feb56#492Mar15 daysApr52#1,085May46#1,202Jun52#788Jul14 daysAug7 daysSepnoneOct14 daysNov55#698Dec54#782
202352 for the year265 days measured591st of 1,355 in the world
Jan5 daysFeb3 daysMar11 daysApr51#545May54#383Jun54#701Jul41#930Aug46#958Sep44#1,165Oct51#430Nov52#744Dec53#695
Each square is a month's mean PM2.5 in US AQI from Cee'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 Cee 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

30 months
MonthWhy
Oct 20263 of 11 days measured; a month needs 8. The others: 2 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 20265 of 30 days measured; a month needs 21. The others: 25 with readings for part of the day (a day needs 18 hours).
Aug 2026No day measured. The others: 31 with readings for part of the day (a day needs 18 hours).
Jul 20264 of 31 days measured; a month needs 22. The others: 27 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 20262 of 31 days measured; a month needs 22. The others: 10 with no readings from the monitor, 19 with readings for part of the day (a day needs 18 hours).
Apr 2026No day measured. The others: 25 with no readings from the monitor, 5 with readings for part of the day (a day needs 18 hours).
Mar 2026No day measured. The others: 31 with no readings from the monitor.
Feb 20264 of 28 days measured; a month needs 20. The others: 19 with no readings from the monitor, 5 with readings for part of the day (a day needs 18 hours).
Jan 202610 of 31 days measured; a month needs 22. The others: 21 with readings for part of the day (a day needs 18 hours).
Dec 20253 of 31 days measured; a month needs 22. The others: 28 with readings for part of the day (a day needs 18 hours).
Nov 20251 of 30 days measured; a month needs 21. The others: 29 with readings for part of the day (a day needs 18 hours).
Oct 20253 of 31 days measured; a month needs 22. The others: 28 with readings for part of the day (a day needs 18 hours).
Sep 202519 of 30 days measured; a month needs 21. The others: 11 with readings for part of the day (a day needs 18 hours).
Aug 202517 of 31 days measured; a month needs 22. The others: 14 with readings for part of the day (a day needs 18 hours).
Jul 20255 of 31 days measured; a month needs 22. The others: 26 with readings for part of the day (a day needs 18 hours).
Jun 20251 of 30 days measured; a month needs 21. The others: 29 with readings for part of the day (a day needs 18 hours).
May 20257 of 31 days measured; a month needs 22. The others: 1 with no readings from the monitor, 23 with readings for part of the day (a day needs 18 hours).
Apr 202518 of 30 days measured; a month needs 21. The others: 12 with readings for part of the day (a day needs 18 hours).
Mar 202513 of 31 days measured; a month needs 22. The others: 18 with readings for part of the day (a day needs 18 hours).
Feb 20251 of 28 days measured; a month needs 20. The others: 27 with readings for part of the day (a day needs 18 hours).
Jan 202517 of 31 days measured; a month needs 22. The others: 14 with readings for part of the day (a day needs 18 hours).
Oct 202414 of 31 days measured; a month needs 22. The others: 17 with readings for part of the day (a day needs 18 hours).
Sep 2024No day measured. The others: 30 with readings for part of the day (a day needs 18 hours).
Aug 20247 of 31 days measured; a month needs 22. The others: 1 with no readings from the monitor, 23 with readings for part of the day (a day needs 18 hours).
Jul 202414 of 31 days measured; a month needs 22. The others: 17 with readings for part of the day (a day needs 18 hours).
Mar 202415 of 31 days measured; a month needs 22. The others: 10 with no readings from the monitor, 6 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 20235 of 31 days measured; a month needs 22. The others: 19 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.

Cee's worst months

MonthUS AQIDays measuredWorld rank
February 2024 5611.8 µg/m³28 of 29492ndof 2,486
January 2024 5511.4 µg/m³30 of 31762ndof 2,385
November 2024 5511.0 µg/m³27 of 30698thof 2,624
December 2024 5410.8 µg/m³26 of 31782ndof 2,616
May 2023 5410.7 µg/m³31 of 31383rdof 1,600
June 2023 5410.6 µg/m³28 of 30701stof 1,603

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.

Cee's worst days

DayUS AQIEpisode
29 Nov 2024 8326.4 µg/m³–
31 Oct 2024 8125.1 µg/m³Northern Spain, October 2024
18 Dec 2024 8024.5 µg/m³–
30 Jan 2024 7924.2 µg/m³–
24 Jun 2023 7723.0 µg/m³–
25 Feb 2024 7421.3 µg/m³–
7 Feb 2024 7320.9 µg/m³–
24 Jun 2026 7220.5 µg/m³–
14 Feb 2023 7220.3 µg/m³–
29 Jan 2024 7120.1 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, Cee, Spain, 1 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/cee/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.

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

Updated 2026-10-12 17:07 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).