SmogRank / Spain / Andalusia / Huelva

Huelva, month by month

Huelva has a measured daily mean on 838 days since 1 January 2023. Its worst month was August 2026, at 63 US AQI (15.6 µg/m³), 365th of 2,896 cities on that month's world ranking. Its cleanest was March 2023, at 43 US AQI (7.8 µg/m³).

Every month since 2023

2026too few days for a mean (a year needs 200)100 days measured
Jan21 daysFeb7 daysMarnoneAprnoneMaynoneJun5 daysJul9 daysAug63#365Sep63#358Oct7 days
2025too few days for a mean (a year needs 256)217 days measured
Jan54#899Feb16 daysMar18 daysApr47#1,655May17 daysJun13 daysJul17 daysAug20 daysSep51#848Oct15 daysNov15 daysDec21 days
2024too few days for a mean (a year needs 257)211 days measured
Jan55#786Feb52#688Mar14 daysApr9 daysMay54#624Jun20 daysJul13 daysAug7 daysSepnoneOct11 daysNov60#460Dec58#595
202354 for the year310 days measured393rd of 1,355 in the world
Jan14 daysFeb49#748Mar43#518Apr54#327May54#406Jun55#625Jul58#316Aug18 daysSep52#631Oct58#165Nov52#668Dec57#429
Each square is a month's mean PM2.5 in US AQI from Huelva'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 Huelva 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

26 months
MonthWhy
Oct 20267 of 12 days measured; a month needs 9. The others: 2 with no readings from the monitors, 3 with readings for part of the day (a day needs 18 hours).
Jul 20269 of 31 days measured; a month needs 22. The others: 22 with under 18 hours of readings or readings that failed our checks.
Jun 20265 of 30 days measured; a month needs 21. The others: 25 with under 18 hours of readings or readings that failed our checks.
May 2026No day measured. The others: 31 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 20267 of 28 days measured; a month needs 20. The others: 21 with under 18 hours of readings or readings that failed our checks.
Jan 202621 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks.
Dec 202521 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks.
Nov 202515 of 30 days measured; a month needs 21. The others: 15 with under 18 hours of readings or readings that failed our checks.
Oct 202515 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks.
Aug 202520 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks.
Jul 202517 of 31 days measured; a month needs 22. The others: 14 with under 18 hours of readings or readings that failed our checks.
Jun 202513 of 30 days measured; a month needs 21. The others: 17 with under 18 hours of readings or readings that failed our checks.
May 202517 of 31 days measured; a month needs 22. The others: 14 with under 18 hours of readings or readings that failed our checks.
Mar 202518 of 31 days measured; a month needs 22. The others: 13 with under 18 hours of readings or readings that failed our checks.
Feb 202516 of 28 days measured; a month needs 20. The others: 12 with under 18 hours of readings or readings that failed our checks.
Oct 202411 of 31 days measured; a month needs 22. The others: 20 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 202413 of 31 days measured; a month needs 22. The others: 18 with under 18 hours of readings or readings that failed our checks.
Jun 202420 of 30 days measured; a month needs 21. The others: 10 with under 18 hours of readings or readings that failed our checks.
Apr 20249 of 30 days measured; a month needs 21. The others: 21 with under 18 hours of readings or readings that failed our checks.
Mar 202414 of 31 days measured; a month needs 22. The others: 17 with under 18 hours of readings or readings that failed our checks.
Aug 202318 of 31 days measured; a month needs 22. The others: 13 with under 18 hours of readings or readings that failed our checks.
Jan 202314 of 31 days measured; a month needs 22. The others: 17 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.

Huelva's worst months

MonthUS AQIDays measuredWorld rank
August 2026 6315.6 µg/m³23 of 31365thof 2,896
September 2026 6315.6 µg/m³28 of 30358thof 2,981
November 2024 6014.0 µg/m³27 of 30460thof 2,624
December 2024 5813.0 µg/m³23 of 31595thof 2,616
July 2023 5812.7 µg/m³26 of 31316thof 1,432
October 2023 5812.6 µg/m³23 of 31165thof 2,012

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.

Huelva's worst days

DayUS AQIEpisode
11 Aug 2026 11039.1 µg/m³–
28 Jul 2026 10838.5 µg/m³North-eastern Spain, July 2026
12 Aug 2026 10236.1 µg/m³–
31 Dec 2023 9030.3 µg/m³Spain, France and 2 more countries, December 2023 to January 2024
7 Aug 2023 8628.0 µg/m³–
6 Apr 2024 8426.6 µg/m³Spain, April 2024
1 Jul 2026 8225.9 µg/m³–
5 Sept 2026 8125.3 µg/m³–
2 Jul 2025 8024.8 µg/m³–
17 Sept 2026 8024.7 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, Huelva, 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/huelva/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.

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

Updated 2026-10-12 23:07 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).